目标c-ios：如何从摄像机卷中选择视频？

我试试这个：

 UIImagePickerController *videoPicker = [[UIImagePickerController alloc] init];
videoPicker.delegate = self;
videoPicker.modalPresentationStyle = UIModalPresentationCurrentContext;
videoPicker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
videoPicker.mediaTypes = @[(NSString*)kUTTypeMovie, (NSString*)kUTTypeAVIMovie, (NSString*)kUTTypeVideo, (NSString*)kUTTypeMPEG4];
videoPicker.videoQuality = UIImagePickerControllerQualityTypeHigh;
[self presentViewController:videoPicker animated:YES completion:nil];

但它只显示照片中的部分视频，而不是相机卷中的全部视频。 我想从摄像机卷中选取所有视频。 请帮我提供一些线索或代码。

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提前谢谢

请使用以下代码从iOS多媒体资料中选择视频

UIImagePickerController *videoPicker = [[UIImagePickerController alloc] init];
videoPicker.delegate = self;
videoPicker.modalPresentationStyle = UIModalPresentationCurrentContext;
videoPicker.mediaTypes =[UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypePhotoLibrary];‌​
videoPicker.mediaTypes = @[(NSString*)kUTTypeMovie, (NSString*)kUTTypeAVIMovie, (NSString*)kUTTypeVideo, (NSString*)kUTTypeMPEG4];
videoPicker.videoQuality = UIImagePickerControllerQualityTypeHigh;
[self presentViewController:videoPicker animated:YES completion:nil];

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请查看此链接

这里是对上述答案的汇编和清理，以及一些更多细节

0确保您拥有这两个包含项

#import <UIKit/UIKit.h>
#import <MobileCoreServices/MobileCoreServices.h> // needed for video types

3处理选择器的响应。将此代码添加到委托类

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

    // This is the NSURL of the video object
    NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL];

    NSLog(@"VideoURL = %@", videoURL);
    [picker dismissViewControllerAnimated:YES completion:NULL];
}

4当用户取消选择任何内容时的句柄

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
    [picker dismissViewControllerAnimated:YES completion:NULL];
}

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可能有助于您设置媒体类型，如videoPicker.mediaTypes=[UIImagePickerController可用于源类型的媒体类型：UIImagePickerController源类型PhotoLibrary]；并尝试执行您的代码。导入以消除此代码中未声明的标识符类型kuTTypeAVIMovie的错误。您不是在此处将值覆盖到videoPicker.mediatypes吗？您的第一个值被忽略。您可以删除videoPicker.mediaTypes的第一个定义，但此代码似乎仍然有效。

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

    // This is the NSURL of the video object
    NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL];

    NSLog(@"VideoURL = %@", videoURL);
    [picker dismissViewControllerAnimated:YES completion:NULL];
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
    [picker dismissViewControllerAnimated:YES completion:NULL];
}