How to obtain the original file name of the image picked by UIImagePickerController?

问题

I've implemented the delegate method and can get access to the picked UIImage, like this:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    UIImage *pickedImage = [info valueForKey:UIImagePickerControllerOriginalImage];

I want to save it to a directory, but I need a file name. So rather than just picking a random file name it would make sense to pick the same file name as the image.

Is there a way to retrieve it from that info dictionary?

回答1:

You could use the UIImagePickerControllerReferenceURL value of the info dictionary instead of the UIImagePickerControllerOriginalImage. This should give you the URL to the original media item.

This would return you a NSURL object which you then can use to build your new filename from.

回答2:

Use ALA Assets library framework

Use the code below


    ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
    UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];
    [library writeImageToSavedPhotosAlbum:image.CGImage orientation:(ALAssetOrientation)image.imageOrientation completionBlock:^(NSURL *assetURL, NSError *error )
    {
       [library assetForURL:assetURL resultBlock:^(ALAsset *asset )
       {
         ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *imageAsset)
         {
             ALAssetRepresentation *imageRep = [imageAsset defaultRepresentation];
             NSLog(@"reference image filename picking from camera: %@", [imageRep filename]);
         };
         ALAssetsLibrary* assetslibrary = [[ALAssetsLibrary alloc] init];
         [assetslibrary assetForURL:assetURL resultBlock:resultblock failureBlock:nil];
       }
       failureBlock:^(NSError *error )
       {
           NSLog(@"Error loading asset");
       }];
    }];

imageView.image = [info objectForKey:UIImagePickerControllerEditedImage];
imageView.contentMode = UIViewContentModeScaleAspectFit;

来源：https://stackoverflow.com/questions/8242935/how-to-obtain-the-original-file-name-of-the-image-picked-by-uiimagepickercontrol

标签

iphone

ios

ipad

uiimagepickercontroller