Add flash mode setting

Camera.ios.js

@@ -15,7 +15,8 @@ var constants = {
   Type: NativeModules.CameraManager.Type,
   CaptureMode: NativeModules.CameraManager.CaptureMode,
   CaptureTarget: NativeModules.CameraManager.CaptureTarget,
-  Orientation: NativeModules.CameraManager.Orientation
+  Orientation: NativeModules.CameraManager.Orientation,
+  FlashMode: NativeModules.CameraManager.FlashMode
 };
 
 var Camera = React.createClass({
@@ -39,6 +40,10 @@ var Camera = React.createClass({
     orientation: PropTypes.oneOfType([
       PropTypes.string,
       PropTypes.number
+    ]),
+    flashMode: PropTypes.oneOfType([
+      PropTypes.string,
+      PropTypes.number
     ])
   },
 
@@ -55,7 +60,8 @@ var Camera = React.createClass({
       type: constants.Type.back,
       orientation: constants.Orientation.auto,
       captureMode: constants.CaptureMode.still,
-      captureTarget: constants.CaptureTarget.memory
+      captureTarget: constants.CaptureTarget.memory,
+      flashMode: constants.FlashMode.off,
     };
   },
 
@@ -82,7 +88,8 @@ var Camera = React.createClass({
 
     var aspect = this.props.aspect,
         type = this.props.type,
-        orientation = this.props.orientation;
+        orientation = this.props.orientation,
+        flashMode = this.props.flashMode;
 
     var legacyProps = {
       aspect: {
@@ -99,12 +106,18 @@ var Camera = React.createClass({
       type: {
         Front: 'front',
         Back: 'back'
+      },
+      flashMode: {
+        Off: 'off',
+        On: 'on',
+        Auto: 'auto'
       }
     };
 
     var foundLegacyAspect = legacyProps.aspect[aspect];
     var foundLegacyOrientation = legacyProps.orientation[orientation];
     var foundLegacyType = legacyProps.type[type];
+    var foundLegacyFlashMode = legacyProps.flashMode[flashMode];
 
     if (__DEV__) {
       if (foundLegacyAspect) {
@@ -137,7 +150,8 @@ var Camera = React.createClass({
       style,
       aspect: aspect,
       type: type,
-      orientation: orientation
+      orientation: orientation,
+      flashMode: flashMode,
     });
 
     return <RCTCamera {... nativeProps} />
@@ -176,7 +190,8 @@ var RCTCamera = createReactNativeComponentClass({
   validAttributes: merge(ReactNativeViewAttributes.UIView, {
     aspect: true,
     type: true,
-    orientation: true
+    orientation: true,
+    flashMode: true,
   }),
   uiViewClassName: 'RCTCamera',
 });

RCTCamera.m

@@ -48,6 +48,11 @@
     }
 }
 
+- (void)setFlashMode:(NSInteger)flashMode
+{
+    [self.manager changeFlashMode:flashMode];
+}
+
 - (id)initWithManager:(RCTCameraManager*)manager
 {
 

RCTCameraManager.h

@@ -32,6 +32,12 @@ typedef NS_ENUM(NSInteger, RCTCameraType) {
     RCTCameraTypeBack = AVCaptureDevicePositionBack
 };
 
+typedef NS_ENUM(NSInteger, RCTCameraFlashMode) {
+    RCTCameraFlashModeOff = AVCaptureFlashModeOff,
+    RCTCameraFlashModeOn = AVCaptureFlashModeOn,
+    RCTCameraFlashModeAuto = AVCaptureFlashModeAuto
+};
+
 @interface RCTCameraManager : RCTViewManager<AVCaptureMetadataOutputObjectsDelegate>
 
 @property (nonatomic) dispatch_queue_t sessionQueue;
@@ -46,6 +52,7 @@ typedef NS_ENUM(NSInteger, RCTCameraType) {
 - (void)changeAspect:(NSString *)aspect;
 - (void)changeCamera:(NSInteger)camera;
 - (void)changeOrientation:(NSInteger)orientation;
+- (void)changeFlashMode:(NSInteger)flashMode;
 - (AVCaptureDevice *)deviceWithMediaType:(NSString *)mediaType preferringPosition:(AVCaptureDevicePosition)position;
 - (void)capture:(NSDictionary*)options callback:(RCTResponseSenderBlock)callback;
 

RCTCameraManager.m

@@ -20,6 +20,7 @@ RCT_EXPORT_MODULE();
 RCT_EXPORT_VIEW_PROPERTY(aspect, NSInteger);
 RCT_EXPORT_VIEW_PROPERTY(type, NSInteger);
 RCT_EXPORT_VIEW_PROPERTY(orientation, NSInteger);
+RCT_EXPORT_VIEW_PROPERTY(flashMode, NSInteger);
 
 - (NSDictionary *)constantsToExport
 {
@@ -47,6 +48,11 @@ RCT_EXPORT_VIEW_PROPERTY(orientation, NSInteger);
         @"landscapeRight": @(RCTCameraOrientationLandscapeRight),
         @"portrait": @(RCTCameraOrientationPortrait),
         @"portraitUpsideDown": @(RCTCameraOrientationPortraitUpsideDown)
+      },
+      @"FlashMode": @{
+        @"off": @(RCTCameraFlashModeOff),
+        @"on": @(RCTCameraFlashModeOn),
+        @"auto": @(RCTCameraFlashModeAuto)
       }
     };
 }
@@ -110,7 +116,7 @@ RCT_EXPORT_VIEW_PROPERTY(orientation, NSInteger);
                     [strongSelf.session startRunning];
                 });
             }]];
-            
+
             [self.session startRunning];
         });
     }
@@ -126,6 +132,10 @@ RCT_EXPORT_METHOD(checkDeviceAuthorizationStatus:(RCTResponseSenderBlock) callba
     }];
 }
 
+RCT_EXPORT_METHOD(changeFlashMode:(NSInteger)flashMode) {
+    AVCaptureDevice *currentCaptureDevice = [self.captureDeviceInput device];
+    [self setFlashMode:flashMode forDevice:currentCaptureDevice];
+}
 
 RCT_EXPORT_METHOD(changeCamera:(NSInteger)camera) {
     AVCaptureDevice *currentCaptureDevice = [self.captureDeviceInput device];
@@ -178,7 +188,7 @@ RCT_EXPORT_METHOD(changeOrientation:(NSInteger)orientation) {
 RCT_EXPORT_METHOD(capture:(NSDictionary *)options callback:(RCTResponseSenderBlock)callback) {
     NSInteger captureMode = [[options valueForKey:@"mode"] intValue];
     NSInteger captureTarget = [[options valueForKey:@"target"] intValue];
-    
+
     if (captureMode == RCTCameraCaptureModeStill) {
         [self captureStill:captureTarget callback:callback];
     }
@@ -196,7 +206,7 @@ RCT_EXPORT_METHOD(capture:(NSDictionary *)options callback:(RCTResponseSenderBlo
             NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];
             UIImage *image = [UIImage imageWithData:imageData];
             UIImage *rotatedImage = [image resizedImage:CGSizeMake(image.size.width, image.size.height) interpolationQuality:kCGInterpolationDefault];
-            
+
             NSString *responseString;
             
             if (target == RCTCameraCaptureTargetMemory) {

README.md

@@ -149,6 +149,15 @@ Event contains `data` (the data in the barcode) and `bounds` (the rectangle whic
 
 *TODO: Only emit one event for each barcode scanned.*
 
+#### `flashMode`
+
+Values:
+`Camera.constants.FlashMode.on`,
+`Camera.constants.FlashMode.off`,
+`Camera.constants.FlashMode.auto`
+
+Use the `flashMode` property to specify the camera flash mode.
+
 ## Component methods
 
 You can access component methods by adding a `ref` (ie. `ref="camera"`) prop to your `<Camera>` element, then you can use `this.refs.camera.capture(cb)`, etc. inside your component.
@@ -164,7 +173,7 @@ This component supports subviews, so if you wish to use the camera view as a bac
 These are some features I think would be important/beneficial to have included with this module. Pull requests welcome!
 
 - [ ] Video support
-- [ ] Flash mode setting
+- [x] Flash mode setting
 - [x] Automatic orientation adjustment
 - [ ] Tap to focus
 - [ ] Optional facial recognition (w/ ability to style box around face)