627 lines
23 KiB
Objective-C
627 lines
23 KiB
Objective-C
#import "RCTCameraManager.h"
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#import "RCTCamera.h"
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#import "RCTBridge.h"
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#import "RCTEventDispatcher.h"
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#import "RCTUtils.h"
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#import "RCTLog.h"
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#import "UIView+React.h"
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#import "NSMutableDictionary+ImageMetadata.m"
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#import <AssetsLibrary/ALAssetsLibrary.h>
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#import <AVFoundation/AVFoundation.h>
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#import <ImageIO/ImageIO.h>
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@implementation RCTCameraManager
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RCT_EXPORT_MODULE();
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- (UIView *)view
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{
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return [[RCTCamera alloc] initWithManager:self];
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}
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RCT_EXPORT_VIEW_PROPERTY(aspect, NSInteger);
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RCT_EXPORT_VIEW_PROPERTY(type, NSInteger);
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RCT_EXPORT_VIEW_PROPERTY(orientation, NSInteger);
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RCT_EXPORT_VIEW_PROPERTY(flashMode, NSInteger);
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RCT_EXPORT_VIEW_PROPERTY(torchMode, NSInteger);
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- (NSDictionary *)constantsToExport
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{
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return @{
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@"Aspect": @{
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@"stretch": @(RCTCameraAspectStretch),
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@"fit": @(RCTCameraAspectFit),
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@"fill": @(RCTCameraAspectFill)
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},
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@"BarCodeType": @{
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@"upce": AVMetadataObjectTypeUPCECode,
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@"code39": AVMetadataObjectTypeCode39Code,
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@"code39mod43": AVMetadataObjectTypeCode39Mod43Code,
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@"ean13": AVMetadataObjectTypeEAN13Code,
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@"ean8": AVMetadataObjectTypeEAN8Code,
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@"code93": AVMetadataObjectTypeCode93Code,
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@"code138": AVMetadataObjectTypeCode128Code,
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@"pdf417": AVMetadataObjectTypePDF417Code,
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@"qr": AVMetadataObjectTypeQRCode,
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@"aztec": AVMetadataObjectTypeAztecCode
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},
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@"Type": @{
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@"front": @(RCTCameraTypeFront),
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@"back": @(RCTCameraTypeBack)
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},
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@"CaptureMode": @{
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@"still": @(RCTCameraCaptureModeStill),
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@"video": @(RCTCameraCaptureModeVideo)
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},
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@"CaptureTarget": @{
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@"memory": @(RCTCameraCaptureTargetMemory),
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@"disk": @(RCTCameraCaptureTargetDisk),
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@"cameraRoll": @(RCTCameraCaptureTargetCameraRoll)
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},
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@"Orientation": @{
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@"auto": @(RCTCameraOrientationAuto),
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@"landscapeLeft": @(RCTCameraOrientationLandscapeLeft),
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@"landscapeRight": @(RCTCameraOrientationLandscapeRight),
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@"portrait": @(RCTCameraOrientationPortrait),
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@"portraitUpsideDown": @(RCTCameraOrientationPortraitUpsideDown)
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},
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@"FlashMode": @{
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@"off": @(RCTCameraFlashModeOff),
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@"on": @(RCTCameraFlashModeOn),
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@"auto": @(RCTCameraFlashModeAuto)
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},
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@"TorchMode": @{
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@"off": @(RCTCameraTorchModeOff),
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@"on": @(RCTCameraTorchModeOn),
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@"auto": @(RCTCameraTorchModeAuto)
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}
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};
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}
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- (NSArray *)getBarCodeTypes {
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return @[
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AVMetadataObjectTypeUPCECode,
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AVMetadataObjectTypeCode39Code,
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AVMetadataObjectTypeCode39Mod43Code,
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AVMetadataObjectTypeEAN13Code,
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AVMetadataObjectTypeEAN8Code,
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AVMetadataObjectTypeCode93Code,
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AVMetadataObjectTypeCode128Code,
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AVMetadataObjectTypePDF417Code,
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AVMetadataObjectTypeQRCode,
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AVMetadataObjectTypeAztecCode
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];
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}
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- (id)init {
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if ((self = [super init])) {
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self.session = [AVCaptureSession new];
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self.session.sessionPreset = AVCaptureSessionPresetHigh;
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self.previewLayer = [AVCaptureVideoPreviewLayer layerWithSession:self.session];
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self.previewLayer.needsDisplayOnBoundsChange = YES;
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self.sessionQueue = dispatch_queue_create("cameraManagerQueue", DISPATCH_QUEUE_SERIAL);
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dispatch_async(self.sessionQueue, ^{
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if (self.presetCamera == AVCaptureDevicePositionUnspecified) {
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self.presetCamera = AVCaptureDevicePositionBack;
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}
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AVCaptureStillImageOutput *stillImageOutput = [[AVCaptureStillImageOutput alloc] init];
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if ([self.session canAddOutput:stillImageOutput])
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{
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stillImageOutput.outputSettings = @{AVVideoCodecKey : AVVideoCodecJPEG};
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[self.session addOutput:stillImageOutput];
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self.stillImageOutput = stillImageOutput;
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}
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AVCaptureMovieFileOutput *movieFileOutput = [[AVCaptureMovieFileOutput alloc] init];
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if ([self.session canAddOutput:movieFileOutput])
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{
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[self.session addOutput:movieFileOutput];
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self.movieFileOutput = movieFileOutput;
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}
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AVCaptureMetadataOutput *metadataOutput = [[AVCaptureMetadataOutput alloc] init];
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if ([self.session canAddOutput:metadataOutput]) {
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[metadataOutput setMetadataObjectsDelegate:self queue:self.sessionQueue];
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[self.session addOutput:metadataOutput];
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[metadataOutput setMetadataObjectTypes:metadataOutput.availableMetadataObjectTypes];
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self.metadataOutput = metadataOutput;
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}
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__weak RCTCameraManager *weakSelf = self;
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[self setRuntimeErrorHandlingObserver:[NSNotificationCenter.defaultCenter addObserverForName:AVCaptureSessionRuntimeErrorNotification object:self.session queue:nil usingBlock:^(NSNotification *note) {
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RCTCameraManager *strongSelf = weakSelf;
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dispatch_async(strongSelf.sessionQueue, ^{
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// Manually restarting the session since it must have been stopped due to an error.
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[strongSelf.session startRunning];
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});
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}]];
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[self.session startRunning];
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});
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}
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return self;
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}
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RCT_EXPORT_METHOD(checkDeviceAuthorizationStatus:(RCTResponseSenderBlock) callback)
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{
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NSString *mediaType = AVMediaTypeVideo;
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[AVCaptureDevice requestAccessForMediaType:mediaType completionHandler:^(BOOL granted) {
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callback(@[[NSNull null], @(granted)]);
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}];
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}
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RCT_EXPORT_METHOD(changeCamera:(NSInteger)camera) {
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dispatch_async(self.sessionQueue, ^{
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AVCaptureDevice *currentCaptureDevice = [self.videoCaptureDeviceInput device];
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AVCaptureDevicePosition position = (AVCaptureDevicePosition)camera;
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AVCaptureDevice *captureDevice = [self deviceWithMediaType:AVMediaTypeVideo preferringPosition:(AVCaptureDevicePosition)position];
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if (captureDevice == nil) {
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return;
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}
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self.presetCamera = camera;
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NSError *error = nil;
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AVCaptureDeviceInput *captureDeviceInput = [AVCaptureDeviceInput deviceInputWithDevice:captureDevice error:&error];
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if (error || captureDeviceInput == nil)
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{
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NSLog(@"%@", error);
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return;
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}
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[self.session beginConfiguration];
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[self.session removeInput:self.videoCaptureDeviceInput];
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if ([self.session canAddInput:captureDeviceInput])
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{
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[self.session addInput:captureDeviceInput];
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[NSNotificationCenter.defaultCenter removeObserver:self name:AVCaptureDeviceSubjectAreaDidChangeNotification object:currentCaptureDevice];
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[NSNotificationCenter.defaultCenter addObserver:self selector:@selector(subjectAreaDidChange:) name:AVCaptureDeviceSubjectAreaDidChangeNotification object:captureDevice];
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self.videoCaptureDeviceInput = captureDeviceInput;
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}
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else
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{
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[self.session addInput:self.videoCaptureDeviceInput];
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}
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[self.session commitConfiguration];
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});
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}
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RCT_EXPORT_METHOD(changeAspect:(NSString *)aspect) {
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self.previewLayer.videoGravity = aspect;
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}
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RCT_EXPORT_METHOD(changeFlashMode:(NSInteger)flashMode) {
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AVCaptureDevice *device = [self.videoCaptureDeviceInput device];
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NSError *error = nil;
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if (![device hasFlash]) return;
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if (![device lockForConfiguration:&error]) {
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NSLog(@"%@", error);
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return;
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}
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[self setFlashMode:flashMode forDevice:device];
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[device unlockForConfiguration];
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}
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RCT_EXPORT_METHOD(changeOrientation:(NSInteger)orientation) {
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self.previewLayer.connection.videoOrientation = orientation;
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}
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RCT_EXPORT_METHOD(changeTorchMode:(NSInteger)torchMode) {
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AVCaptureDevice *device = [self.videoCaptureDeviceInput device];
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NSError *error = nil;
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if (![device hasTorch]) return;
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if (![device lockForConfiguration:&error]) {
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NSLog(@"%@", error);
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return;
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}
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[device setTorchMode: torchMode];
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[device unlockForConfiguration];
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}
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RCT_EXPORT_METHOD(capture:(NSDictionary *)options callback:(RCTResponseSenderBlock)callback) {
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NSInteger captureMode = [[options valueForKey:@"mode"] intValue];
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NSInteger captureTarget = [[options valueForKey:@"target"] intValue];
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if (captureMode == RCTCameraCaptureModeStill) {
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[self captureStill:captureTarget options:options callback:callback];
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}
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else if (captureMode == RCTCameraCaptureModeVideo) {
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[self captureVideo:captureTarget options:options callback:callback];
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}
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}
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RCT_EXPORT_METHOD(stopCapture) {
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if (self.movieFileOutput.recording) {
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[self.movieFileOutput stopRecording];
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}
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}
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- (void)initializeCaptureSessionInput:(NSString *)type {
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dispatch_async(self.sessionQueue, ^{
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NSError *error = nil;
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AVCaptureDevice *captureDevice = [self deviceWithMediaType:AVMediaTypeVideo preferringPosition:self.presetCamera];
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if (captureDevice == nil) {
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return;
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}
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AVCaptureDeviceInput *captureDeviceInput = [AVCaptureDeviceInput deviceInputWithDevice:captureDevice error:&error];
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if (error || captureDeviceInput == nil) {
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NSLog(@"%@", error);
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return;
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}
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[self.session beginConfiguration];
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if (type == AVMediaTypeAudio) {
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[self.session removeInput:self.audioCaptureDeviceInput];
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}
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else if (type == AVMediaTypeVideo) {
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[self.session removeInput:self.videoCaptureDeviceInput];
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}
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if ([self.session canAddInput:captureDeviceInput]) {
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[self.session addInput:captureDeviceInput];
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if (type == AVMediaTypeAudio) {
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self.audioCaptureDeviceInput = captureDeviceInput;
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}
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else if (type == AVMediaTypeVideo) {
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self.videoCaptureDeviceInput = captureDeviceInput;
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}
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[self.metadataOutput setMetadataObjectTypes:self.metadataOutput.availableMetadataObjectTypes];
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}
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[self.session commitConfiguration];
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});
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}
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- (void)captureStill:(NSInteger)target options:(NSDictionary *)options callback:(RCTResponseSenderBlock)callback {
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if ([[[UIDevice currentDevice].model lowercaseString] rangeOfString:@"simulator"].location != NSNotFound){
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CGSize size = CGSizeMake(720, 1280);
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UIGraphicsBeginImageContextWithOptions(size, YES, 0);
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[[UIColor whiteColor] setFill];
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UIRectFill(CGRectMake(0, 0, size.width, size.height));
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UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
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UIGraphicsEndImageContext();
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NSData *imageData = UIImageJPEGRepresentation(image, 1.0);
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[self saveImage:imageData target:target metadata:nil callback:callback];
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} else {
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[[self.stillImageOutput connectionWithMediaType:AVMediaTypeVideo] setVideoOrientation:self.previewLayer.connection.videoOrientation];
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[self.stillImageOutput captureStillImageAsynchronouslyFromConnection:[self.stillImageOutput connectionWithMediaType:AVMediaTypeVideo] completionHandler:^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) {
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NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];
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// Create image source
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CGImageSourceRef source = CGImageSourceCreateWithData((CFDataRef)imageData, NULL);
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//get all the metadata in the image
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NSMutableDictionary *imageMetadata = [(NSDictionary *) CFBridgingRelease(CGImageSourceCopyPropertiesAtIndex(source, 0, NULL)) mutableCopy];
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// create cgimage
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CGImageRef cgImage;
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cgImage = CGImageSourceCreateImageAtIndex(source, 0, NULL);
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if ([options objectForKey:@"rotation"]) {
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float rotation = [[options objectForKey:@"rotation"] floatValue];
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cgImage = [self CGImageRotatedByAngle:cgImage angle:rotation];
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} else {
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// Get metadata orientation
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int metadataOrientation = [[imageMetadata objectForKey:(NSString *)kCGImagePropertyOrientation] intValue];
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if (metadataOrientation == 6) {
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cgImage = [self CGImageRotatedByAngle:cgImage angle:270];
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} else if (metadataOrientation == 1) {
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cgImage = [self CGImageRotatedByAngle:cgImage angle:0];
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} else if (metadataOrientation == 3) {
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cgImage = [self CGImageRotatedByAngle:cgImage angle:180];
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}
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}
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// Erase metadata orientation
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[imageMetadata removeObjectForKey:(NSString *)kCGImagePropertyOrientation];
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// Erase stupid TIFF stuff
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[imageMetadata removeObjectForKey:(NSString *)kCGImagePropertyTIFFDictionary];
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// Add input metadata
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[imageMetadata mergeMetadata:[options objectForKey:@"metadata"]];
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// Create destination thing
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NSMutableData *rotatedImageData = [NSMutableData data];
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CGImageDestinationRef destination = CGImageDestinationCreateWithData((CFMutableDataRef)rotatedImageData, CGImageSourceGetType(source), 1, NULL);
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// add the image to the destination, reattaching metadata
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CGImageDestinationAddImage(destination, cgImage, (CFDictionaryRef) imageMetadata);
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// And write
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CGImageDestinationFinalize(destination);
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if (rotatedImageData) {
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[self saveImage:rotatedImageData target:target metadata:imageMetadata callback:callback];
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}
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else {
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callback(@[RCTMakeError(error.description, nil, nil)]);
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}
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CFRelease(imageDataSampleBuffer);
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CGImageRelease(cgImage);
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CFRelease(source);
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CFRelease(destination);
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}];
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}
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}
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- (void)saveImage:(NSData*)imageData target:(NSInteger)target metadata:(NSDictionary *)metadata callback:(RCTResponseSenderBlock)callback {
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NSString *responseString;
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if (target == RCTCameraCaptureTargetMemory) {
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responseString = [imageData base64EncodedStringWithOptions:0];
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}
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else if (target == RCTCameraCaptureTargetDisk) {
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NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
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NSString *documentsDirectory = [paths firstObject];
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NSFileManager *fileManager = [NSFileManager defaultManager];
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NSString *fullPath = [[documentsDirectory stringByAppendingPathComponent:[[NSUUID UUID] UUIDString]] stringByAppendingPathExtension:@"jpg"];
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[fileManager createFileAtPath:fullPath contents:imageData attributes:nil];
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responseString = fullPath;
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}
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else if (target == RCTCameraCaptureTargetCameraRoll) {
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[[[ALAssetsLibrary alloc] init] writeImageDataToSavedPhotosAlbum:imageData metadata:metadata completionBlock:^(NSURL* url, NSError* error) {
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if (error == nil) {
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callback(@[[NSNull null], [url absoluteString]]);
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}
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else {
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callback(@[RCTMakeError(error.description, nil, nil)]);
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}
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}];
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return;
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}
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callback(@[[NSNull null], responseString]);
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}
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- (CGImageRef)CGImageRotatedByAngle:(CGImageRef)imgRef angle:(CGFloat)angle
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{
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CGFloat angleInRadians = angle * (M_PI / 180);
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CGFloat width = CGImageGetWidth(imgRef);
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CGFloat height = CGImageGetHeight(imgRef);
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CGRect imgRect = CGRectMake(0, 0, width, height);
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CGAffineTransform transform = CGAffineTransformMakeRotation(angleInRadians);
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CGRect rotatedRect = CGRectApplyAffineTransform(imgRect, transform);
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CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
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CGContextRef bmContext = CGBitmapContextCreate(NULL, rotatedRect.size.width, rotatedRect.size.height, 8, 0, colorSpace, (CGBitmapInfo) kCGImageAlphaPremultipliedFirst);
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CGContextSetAllowsAntialiasing(bmContext, TRUE);
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CGContextSetInterpolationQuality(bmContext, kCGInterpolationNone);
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CGColorSpaceRelease(colorSpace);
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CGContextTranslateCTM(bmContext, +(rotatedRect.size.width/2), +(rotatedRect.size.height/2));
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CGContextRotateCTM(bmContext, angleInRadians);
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CGContextTranslateCTM(bmContext, -(rotatedRect.size.width/2), -(rotatedRect.size.height/2));
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CGContextDrawImage(bmContext, CGRectMake((rotatedRect.size.width-width)/2.0f, (rotatedRect.size.height-height)/2.0f, width, height), imgRef);
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CGImageRef rotatedImage = CGBitmapContextCreateImage(bmContext);
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CFRelease(bmContext);
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return rotatedImage;
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}
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-(void)captureVideo:(NSInteger)target options:(NSDictionary *)options callback:(RCTResponseSenderBlock)callback {
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if (self.movieFileOutput.recording) {
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callback(@[RCTMakeError(@"Already Recording", nil, nil)]);
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return;
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}
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if ([options valueForKey:@"audio"]) {
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[self initializeCaptureSessionInput:AVMediaTypeAudio];
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}
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Float64 totalSeconds = [[options valueForKey:@"totalSeconds"] floatValue];
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if (totalSeconds > -1) {
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int32_t preferredTimeScale = [[options valueForKey:@"preferredTimeScale"] intValue];
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CMTime maxDuration = CMTimeMakeWithSeconds(totalSeconds, preferredTimeScale);
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self.movieFileOutput.maxRecordedDuration = maxDuration;
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}
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dispatch_async(self.sessionQueue, ^{
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[[self.movieFileOutput connectionWithMediaType:AVMediaTypeVideo] setVideoOrientation:self.previewLayer.connection.videoOrientation];
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//Create temporary URL to record to
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NSString *outputPath = [[NSString alloc] initWithFormat:@"%@%@", NSTemporaryDirectory(), @"output.mov"];
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NSURL *outputURL = [[NSURL alloc] initFileURLWithPath:outputPath];
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NSFileManager *fileManager = [NSFileManager defaultManager];
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if ([fileManager fileExistsAtPath:outputPath]) {
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NSError *error;
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if ([fileManager removeItemAtPath:outputPath error:&error] == NO) {
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callback(@[RCTMakeError(error.description, nil, nil)]);
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return;
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}
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}
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//Start recording
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[self.movieFileOutput startRecordingToOutputFileURL:outputURL recordingDelegate:self];
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self.videoCallback = callback;
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self.videoTarget = target;
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});
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}
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- (void)captureOutput:(AVCaptureFileOutput *)captureOutput
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didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL
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fromConnections:(NSArray *)connections
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error:(NSError *)error
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{
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BOOL recordSuccess = YES;
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if ([error code] != noErr) {
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// A problem occurred: Find out if the recording was successful.
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id value = [[error userInfo] objectForKey:AVErrorRecordingSuccessfullyFinishedKey];
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if (value) {
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recordSuccess = [value boolValue];
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}
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}
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if (!recordSuccess) {
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self.videoCallback(@[RCTMakeError(@"Error while recording", nil, nil)]);
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return;
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}
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if (self.videoTarget == RCTCameraCaptureTargetCameraRoll) {
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ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
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if ([library videoAtPathIsCompatibleWithSavedPhotosAlbum:outputFileURL]) {
|
|
[library writeVideoAtPathToSavedPhotosAlbum:outputFileURL
|
|
completionBlock:^(NSURL *assetURL, NSError *error) {
|
|
if (error) {
|
|
self.videoCallback(@[RCTMakeError(error.description, nil, nil)]);
|
|
return;
|
|
}
|
|
|
|
self.videoCallback(@[[NSNull null], [assetURL absoluteString]]);
|
|
}];
|
|
}
|
|
}
|
|
else if (self.videoTarget == RCTCameraCaptureTargetDisk) {
|
|
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
|
|
NSString *documentsDirectory = [paths firstObject];
|
|
NSString *fullPath = [[documentsDirectory stringByAppendingPathComponent:[[NSUUID UUID] UUIDString]] stringByAppendingPathExtension:@"mov"];
|
|
|
|
NSFileManager * fileManager = [NSFileManager defaultManager];
|
|
NSError * error = nil;
|
|
|
|
//copying destination
|
|
if (!([fileManager copyItemAtPath:[outputFileURL path] toPath:fullPath error:&error])) {
|
|
self.videoCallback(@[RCTMakeError(error.description, nil, nil)]);
|
|
return;
|
|
}
|
|
self.videoCallback(@[[NSNull null], fullPath]);
|
|
}
|
|
else {
|
|
self.videoCallback(@[RCTMakeError(@"Target not supported", nil, nil)]);
|
|
}
|
|
}
|
|
|
|
- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection {
|
|
|
|
for (AVMetadataMachineReadableCodeObject *metadata in metadataObjects) {
|
|
for (id barcodeType in [self getBarCodeTypes]) {
|
|
if (metadata.type == barcodeType) {
|
|
|
|
[self.bridge.eventDispatcher sendDeviceEventWithName:@"CameraBarCodeRead"
|
|
body:@{
|
|
@"type": metadata.type,
|
|
@"data": metadata.stringValue,
|
|
@"bounds": @{
|
|
@"origin": @{
|
|
@"x": [NSString stringWithFormat:@"%f", metadata.bounds.origin.x],
|
|
@"y": [NSString stringWithFormat:@"%f", metadata.bounds.origin.y]
|
|
},
|
|
@"size": @{
|
|
@"height": [NSString stringWithFormat:@"%f", metadata.bounds.size.height],
|
|
@"width": [NSString stringWithFormat:@"%f", metadata.bounds.size.width],
|
|
}
|
|
}
|
|
}];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
- (AVCaptureDevice *)deviceWithMediaType:(NSString *)mediaType preferringPosition:(AVCaptureDevicePosition)position
|
|
{
|
|
NSArray *devices = [AVCaptureDevice devicesWithMediaType:mediaType];
|
|
AVCaptureDevice *captureDevice = [devices firstObject];
|
|
|
|
for (AVCaptureDevice *device in devices)
|
|
{
|
|
if ([device position] == position)
|
|
{
|
|
captureDevice = device;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return captureDevice;
|
|
}
|
|
|
|
|
|
- (void)setFlashMode:(AVCaptureFlashMode)flashMode forDevice:(AVCaptureDevice *)device
|
|
{
|
|
if (device.hasFlash && [device isFlashModeSupported:flashMode])
|
|
{
|
|
NSError *error = nil;
|
|
if ([device lockForConfiguration:&error])
|
|
{
|
|
[device setFlashMode:flashMode];
|
|
[device unlockForConfiguration];
|
|
}
|
|
else
|
|
{
|
|
NSLog(@"%@", error);
|
|
}
|
|
}
|
|
}
|
|
|
|
- (void)subjectAreaDidChange:(NSNotification *)notification
|
|
{
|
|
CGPoint devicePoint = CGPointMake(.5, .5);
|
|
[self focusWithMode:AVCaptureFocusModeContinuousAutoFocus exposeWithMode:AVCaptureExposureModeContinuousAutoExposure atDevicePoint:devicePoint monitorSubjectAreaChange:NO];
|
|
}
|
|
|
|
- (void)focusWithMode:(AVCaptureFocusMode)focusMode exposeWithMode:(AVCaptureExposureMode)exposureMode atDevicePoint:(CGPoint)point monitorSubjectAreaChange:(BOOL)monitorSubjectAreaChange
|
|
{
|
|
dispatch_async([self sessionQueue], ^{
|
|
AVCaptureDevice *device = [[self videoCaptureDeviceInput] device];
|
|
NSError *error = nil;
|
|
if ([device lockForConfiguration:&error])
|
|
{
|
|
if ([device isFocusPointOfInterestSupported] && [device isFocusModeSupported:focusMode])
|
|
{
|
|
[device setFocusMode:focusMode];
|
|
[device setFocusPointOfInterest:point];
|
|
}
|
|
if ([device isExposurePointOfInterestSupported] && [device isExposureModeSupported:exposureMode])
|
|
{
|
|
[device setExposureMode:exposureMode];
|
|
[device setExposurePointOfInterest:point];
|
|
}
|
|
[device setSubjectAreaChangeMonitoringEnabled:monitorSubjectAreaChange];
|
|
[device unlockForConfiguration];
|
|
}
|
|
else
|
|
{
|
|
NSLog(@"%@", error);
|
|
}
|
|
});
|
|
}
|
|
|
|
|
|
@end
|