ios - videoMaximumDuration 不限制持续时间

Question

我希望用户从他的库中选择一个视频并将其限制为 45 秒（如 WhatsApp - 您可以编辑视频，并且将发送的视频不超过 45 秒。

但是如果我使用下面的代码，它会选择一个视频而不考虑持续时间，我不能修剪它（用视频测试，长度为 1 分钟）

UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
        imagePickerController.delegate = self; 
        imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        imagePickerController.videoQuality = UIImagePickerControllerQualityTypeLow;
        imagePickerController.videoMaximumDuration = 45.0f; //?
        imagePickerController.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypePhotoLibrary];

        [[self parentViewController] presentModalViewController:imagePickerController animated:YES];
        [imagePickerController release];

在 WhatsApp 中，我得到以下屏幕，我想重现该屏幕：

Answer 1

确保在呈现控制器之前将allowEditing 设置为YES。

imagePickerController.allowsEditing = YES;