UIImage在iPhone上用文件名保存图像

我怎样才能保存一个图像（如使用UIImageWriteToSavedPhotosAlbum（）方法）与我select的文件名私人/ var文件夹？

Answer 1

肯尼，你有答案！ 为了说明，我总是认为代码更有帮助。

//I do this in the didFinishPickingImage:(UIImage *)img method NSData* imageData = UIImageJPEGRepresentation(img, 1.0); //save to the default 100Apple(Camera Roll) folder. [imageData writeToFile:@"/private/var/mobile/Media/DCIM/100APPLE/customImageFilename.jpg" atomically:NO]; 

Answer 2

UIImageWriteToSavedPhotosAlbum()仅用于保存到照片相机胶卷。 要保存到自定义文件夹，您需要使用UIImageJPEGRepresentation()或UIImagePNGRepresentation()将UIImage转换为NSData，然后将此NSData保存到您喜欢的任何位置。

Answer 3

您可以使用下面的代码，而不使用ALAssetsLibrary …

 NSString *fileName; - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { [picker dismissViewControllerAnimated:YES completion:^{ if( [picker sourceType] == UIImagePickerControllerSourceTypeCamera ) { UIImageWriteToSavedPhotosAlbum(image,nil, nil, nil); [self performSelector:@selector(GetImageName) withObject:nil afterDelay:0.5]; } else { NSURL *refURL = [info valueForKey:UIImagePickerControllerReferenceURL]; PHFetchResult *result = [PHAsset fetchAssetsWithALAssetURLs:@[refURL] options:nil]; fileName = [[result firstObject] filename]; } }]; -(void)GetImageName { NSString *str =@""; PHFetchOptions *fetchOptions = [[PHFetchOptions alloc] init]; fetchOptions.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:YES]]; PHFetchResult *fetchResult = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeImage options:fetchOptions]; if (fetchResult != nil && fetchResult.count > 0) { str = [[fetchResult lastObject] filename]; } fileName = str; }