通过UIImagePickerController选取的图片名称信息

 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { 
 
    NSURL *imageURL = [info valueForKey:UIImagePickerControllerReferenceURL];
 
    ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *myasset)    {
 
        ALAssetRepresentation *representation = [myasset defaultRepresentation];
 
        weakSelf.imageName = [representation filename];
 
        NSLog(@"imageName : %@",weakSelf.imageName);
 
    };
 
    ALAssetsLibrary *assetslibrary = [[ALAssetsLibrary alloc] init];
 
    [assetslibrary assetForURL:imageURL resultBlock:resultblock failureBlock:nil];
}