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我可以轻松保存到相机胶卷使用相机拍摄的图像。 但我不想保存图像,如果这是从相机胶卷选择,因为它会创建一个副本。如何避免将从相机胶卷拾取的图像保存到相机胶卷? [iOS]
如何做到以下几点,并选择性地保存到相机胶卷?
编辑1: 正如rmaddy说我可以: 如果picker.sourceType等于UIImagePickerControllerSourceTypeCamera,则仅保存到相机胶卷。
但如果我这样做,我将无法获得所选图像的信息,主要是文件名。
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];
if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {
UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
[self.myImageView setImage: image];
[self.myImageView setContentMode:UIViewContentModeScaleAspectFit];
ALAssetsLibrary *al=[[ALAssetsLibrary alloc] init];
// ------> Saving to Camera Roll <------------
[al writeImageToSavedPhotosAlbum:[image CGImage] metadata:nil completionBlock:^(NSURL *assetURL,NSError *error) {
ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *myAsset) {
ALAssetRepresentation *rep = [myAsset defaultRepresentation];
NSString *fileName = [rep filename];
ImageInfo *imgInfo = [[ImageInfo alloc] initWithEventId:0 name:fileName image:UIImageJPEGRepresentation(image, 1.0)];
imgInfo.isDirty = YES;
[self.imagesArray addObject:imgInfo];
[self dismissViewControllerAnimated:YES completion:nil];
NSLog(@"Image from Camera %@ added to imageArray",fileName);
};
ALAssetsLibrary *assetsLibrary = [[ALAssetsLibrary alloc]init];
[assetsLibrary assetForURL:assetURL
resultBlock:resultblock
failureBlock:nil];
}];
}
else if ([mediaType isEqualToString:(NSString *)kUTTypeMovie])
{
// Code here to support video if enabled
}
编辑2:
解决了这个mod: (我知道有一个重复的代码一点点,我稍后会尝试改善它)
if (newMedia){
ALAssetsLibrary *al=[[ALAssetsLibrary alloc] init];
[al writeImageToSavedPhotosAlbum:[image CGImage] metadata:nil completionBlock:^(NSURL *assetURL,NSError *error)
{
ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *myAsset)
{
ALAssetRepresentation *rep = [myAsset defaultRepresentation];
//NSString *fileName = [rep filename];
NSString *imgUrl = [[rep url] absoluteString];
ImageInfo *imgInfo = [[ImageInfo alloc] initWithEventId:0 imgUrl:imgUrl image:UIImageJPEGRepresentation(image, 1.0)];
imgInfo.isDirty = YES;
[self.imagesArray addObject:imgInfo];
[self dismissViewControllerAnimated:YES completion:nil];
NSLog(@"Image from Camera %@ added to imageArray",imgUrl);
};
ALAssetsLibrary *assetsLibrary = [[ALAssetsLibrary alloc]init];
[assetsLibrary assetForURL:assetURL
resultBlock:resultblock
failureBlock:nil];
}];
} else {
NSString* imgUrl = UIImagePickerControllerReferenceURL;
ImageInfo *imgInfo = [[ImageInfo alloc] initWithEventId:0 imgUrl:imgUrl image:UIImageJPEGRepresentation(image, 1.0)];
imgInfo.isDirty = YES;
[self.imagesArray addObject:imgInfo];
NSLog(@"Image from Camera Roll %@ added to imageArray",imgUrl);
[self dismissViewControllerAnimated:YES completion:nil];
}
对,但如果我这样做,我将无法获得所选图像的信息,主要是文件名。 – Alvin
@AlvinPastore使用'info'字典的'UIImagePickerControllerReferenceURL'键来获取所选图像的原始URL。从照片库中获取图像时,使用它代替'assetURL'。 – rmaddy
谢谢。我决定使用URL而不是文件名,并修改代码以直接处理信息(如您所建议的),而不是使用ALAssetLibrary代码... – Alvin