80 lines
2.4 KiB
Objective-C
80 lines
2.4 KiB
Objective-C
//
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// ImageResize.m
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// ChoozItApp
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//
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// Created by Florian Rival on 19/11/15.
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//
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#include "RCTImageResizer.h"
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#include "ImageHelpers.h"
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#import "RCTImageLoader.h"
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@implementation ImageResizer
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@synthesize bridge = _bridge;
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RCT_EXPORT_MODULE();
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void saveImage(NSString * fullPath, UIImage * image, float quality)
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{
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NSData* data = UIImageJPEGRepresentation(image, quality / 100.0);
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NSFileManager* fileManager = [NSFileManager defaultManager];
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[fileManager createFileAtPath:fullPath contents:data attributes:nil];
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}
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NSString * generateFilePath(NSString * ext, NSString * outputPath)
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{
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NSString* directory;
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if ([outputPath length] == 0) {
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NSArray* paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
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directory = [paths firstObject];
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} else {
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directory = outputPath;
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}
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NSString* name = [[NSUUID UUID] UUIDString];
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NSString* fullName = [NSString stringWithFormat:@"%@.%@", name, ext];
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NSString* fullPath = [directory stringByAppendingPathComponent:fullName];
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return fullPath;
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}
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RCT_EXPORT_METHOD(createResizedImage:(NSString *)path
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width:(float)width
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height:(float)height
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quality:(float)quality
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outputPath:(NSString *)outputPath
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callback:(RCTResponseSenderBlock)callback)
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{
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CGSize newSize = CGSizeMake(width, height);
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NSString* fullPath = generateFilePath(@"jpg", outputPath);
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[_bridge.imageLoader loadImageWithTag:path callback:^(NSError *error, UIImage *image) {
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if (error || image == nil) {
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if ([path hasPrefix:@"data:"] || [path hasPrefix:@"file:"]) {
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NSURL *imageUrl = [[NSURL alloc] initWithString:path];
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image = [UIImage imageWithData:[NSData dataWithContentsOfURL:imageUrl]];
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} else {
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image = [[UIImage alloc] initWithContentsOfFile:path];
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}
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if (image == nil) {
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callback(@[@"Can't retrieve the file from the path.", @""]);
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return;
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}
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}
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// Do the resizing
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UIImage * scaledImage = [image scaleToSize:newSize];
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if (scaledImage == nil) {
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callback(@[@"Can't resize the image.", @""]);
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return;
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}
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saveImage(fullPath, scaledImage, quality);
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callback(@[[NSNull null], fullPath]);
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}];
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}
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@end
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