UIImagePickerController不遵守iPad上的视频最长持续时间 [英] UIImagePickerController not respecting video maximum duration on iPad

问题描述

我正在尝试构建一个应用程序，允许用户从iPad上的库中选择和上传视频.我需要的最大视频长度为30秒.

I am trying to build an app that would let user pick and upload a video from the library on iPad. I need the max video length to be 30 sec.

我正在使用以下代码:

UIImagePickerController *mediaPicker = [[UIImagePickerController alloc] init];

mediaPicker.mediaTypes = [NSArray arrayWithObjects:(NSString *)kUTTypeMovie,(NSString *)kUTTypeImage,nil];
mediaPicker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;

mediaPicker.videoQuality = UIImagePickerControllerQualityTypeIFrame960x540;
mediaPicker.videoMaximumDuration = 30.0f;
mediaPicker.delegate = self;


if (self.imagePickerPopOverController.popoverVisible) {
    [self.imagePickerPopOverController dismissPopoverAnimated:YES];
}

self.imagePickerPopOverController = [[UIPopoverController alloc] initWithContentViewController:mediaPicker];
[self.imagePickerPopOverController presentPopoverFromBarButtonItem:self.navigationItem.rightBarButtonItem
                                          permittedArrowDirections:UIPopoverArrowDirectionUp
                                                          animated:NO];

选择视频后，我希望UIImagePickerController显示一个微调器，以将视频长度调整为30秒(如果更长)，但是不会.

After the video has been picked, I expect the UIImagePickerController to show a trimmer to trim the video length to 30 sec (if its longer), but it does not.

推荐答案

在显示控制器之前进行设置.

Set this before you present the controller.

imagePickerController.allowsEditing = YES;

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