MPMediaPickerController，视频媒体类型不起作用 [英] MPMediaPickerController with video media types not working

问题描述

我正在尝试使用新的视频媒体类型浏览存储在我的i​​Pod库中的视频。对于任何视频类型，我在控制台上收到此错误：

I am trying to browse video stored in my iPod library using the new video media types. With any video type I get this error on the console:

Warning: Unsupported media types (1024), using MPMediaTypeAny.

此错误后，选择器仅显示音频类型。

After this error, the picker only shows audio types.

作为参考，这些是iOS5.0中可用的新媒体类型（在MediaPlayer.framework / MediaItem.h中定义）：

For reference, these are the new media types available in iOS5.0 (defined in MediaPlayer.framework/MediaItem.h):

// video (available in iOS 5.0)
MPMediaTypeMovie        = 1 << 8,
MPMediaTypeTVShow       = 1 << 9,
MPMediaTypeVideoPodcast = 1 << 10,
MPMediaTypeMusicVideo   = 1 << 11,
MPMediaTypeVideoITunesU = 1 << 12,
MPMediaTypeAnyVideo     = 0xff00,

推荐答案

可以您在代码中成功查询电影库，例如：

Can you query the Movie library in code successfully e.g.:

MPMediaPropertyPredicate *predicate = [MPMediaPropertyPredicate predicateWithValue:[NSNumber numberWithInteger:MPMediaTypeMovie] forProperty:MPMediaItemPropertyMediaType];

MPMediaQuery *query = [[MPMediaQuery alloc] init];
[query addFilterPredicate:predicate];

NSArray *items = [query items];

for (MPMediaItem* item in items)
{
    NSString* title = [item valueForProperty:MPMediaItemPropertyTitle];

    url = [item valueForProperty:MPMediaItemPropertyAssetURL];

}

你应该看到所有的电影片头。这对我在IOS5和iPad 2上都没问题。但我仍然有你的问题。解决方法是将上面的代码结果放在自己的模态视图中。

You should see all movie titles. This is OK for me on IOS5 and iPad 2. I still have your problem though. A workaround is putting the above code results in its own modal view.

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