ios - 从 iPhone 照片库中选择一个视频

Question

我正在尝试使用 UIImagePickerController 从 iPhone 照片库中选择一个视频，以便我可以将其上传到服务器。我能够使用 UIImagePickerController 选择图像而没有任何错误/崩溃，但是在选择(不是实际单击选择按钮，而是只是从库中选择视频)视频时我的应用程序崩溃了。它只是在控制台上打印以下行:

setting movie path: (null)

setting movie path: /Users/Mahesh/Library/Application Support/iPhoneSimulator/6.1/Media/DCIM/100APPLE/IMG_0006.mp4

事件委托(delegate)方法 didFinishPickingMediaWithInfo 没有被调用，在它被调用之前我的应用程序崩溃了。我只是无法弄清楚到底是什么导致了这个问题。

以下是我打开 iPhone 库的代码:

UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate = self;
//imagePicker.mediaTypes = [NSArray arrayWithObjects:@"public.movie", nil];
imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
imagePicker.mediaTypes =[UIImagePickerController availableMediaTypesForSourceType:imagePicker.sourceType];

[self presentViewController:imagePicker animated:YES completion:nil];


- (void) imagePickerController: (UIImagePickerController *) picker didFinishPickingMediaWithInfo: (NSDictionary *) info
{

NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];
if ([mediaType isEqualToString:@"public.image"]){
    UIImage *editedImage = (UIImage *)[info objectForKey:@"UIImagePickerControllerOriginalImage"];
    
    // Compressing the image size
    CGSize newSize = CGSizeMake(400, 400);
    UIGraphicsBeginImageContext(newSize);
    
    [editedImage drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
    // Get the new image from the context
    UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
    // End the context
    UIGraphicsEndImageContext();
    
    NSData *data =  UIImageJPEGRepresentation(newImage,0.2);//PNGRepresentation(imgView.image);
   
}
else if ([mediaType isEqualToString:@"public.movie"]){
    
    NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL];
}

[self dismissViewControllerAnimated:YES completion:nil];

}

请帮助我..谢谢!

Answer 1

尝试

picker.mediaTypes = @[(NSString *)kUTTypeMovie, (NSString *)kUTTypeImage];