Question

我已经实现了委托方法，可以访问所选的UIImage，如下所示：

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

我想将其保存到目录中，但我需要一个文件名。因此，不仅仅是选择一个随机文件名，选择与图像相同的文件名是有意义的。

有没有办法从该信息字典中检索它？

Answer 1

您可以使用信息词典的UIImagePickerControllerReferenceURL值而不是UIImagePickerControllerOriginalImage。这应该为您提供原始媒体项的URL。

这将返回一个NSURL对象，然后您可以使用它来构建新的文件名。

Answer 2

使用ALA资产库框架

使用以下代码


    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;

如何获取UIImagePickerController选取的图像的原始文件名？

2 个答案: