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在 45 秒内(就像 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时长，我不能修剪它(用视频测试过，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，我想复制它:

Answer 1

确保在显示 Controller 之前将 allowsEditing 设置为 YES。

imagePickerController.allowsEditing = YES;