ios - MPMoviePlayerController 不从 Documents 文件夹播放

Question

绝望。大家好!我在使用 MPMoviePlayerController 时遇到了一些问题。我已经让它与来自 NSBundle 的视频一起工作。但这不是我需要的。我需要从 Documents 目录播放它，因为那是我存储录制视频的地方，URL 存储在 CoreData 中。但是让我们把这个放在一边，将代码简化到最低限度。如果使用 contentURL，这段代码实际上是有效的，这会导致 NSBundle。之后，我要做什么才能到达文档位置。我的工作:

    NSURL *contentURL = [[NSBundle mainBundle] URLForResource:@"Oct_08_2012_10_00_51" withExtension:@"mp4"]; // this works
NSString* docPath = [NSSearchPathForDirectoriesInDomains
                     (NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString * docaPathFull = [NSString stringWithFormat:@"%@%@", docPath, @"/Oct_08_2012_10_00_51.mp4"];
NSURL * docUrl= [NSURL URLWithString: docaPathFull];
BOOL ex = [[NSFileManager defaultManager] fileExistsAtPath:docaPathFull];
NSLog(@"file exists: %d, path using docPath: %@",ex, docaPathFull);
MPMoviePlayerController *player = [[MPMoviePlayerController alloc] initWithContentURL:docUrl];
player.shouldAutoplay = YES;
player.controlStyle = MPMovieControlStyleEmbedded;
[player.view setFrame: self.thumbButton.bounds];
[player prepareToPlay];
[self.view addSubview: player.view];
[player play];

我们有什么:

2012-10-08 13:14:43.532 Voto[11968:907] file exists: 1, path using docPath: /var/mobile/Applications/07B8574A-A3BA-4B23-BB3F-995B33A01B95/Documents/Oct_08_2012_10_00_51.mp4
2012-10-08 13:14:43.907 Voto[11968:907] content URL: file://localhost/var/mobile/Applications/07B8574A-A3BA-4B23-BB3F-995B33A01B95/Voto.app/Oct_08_2012_10_00_51.mp4
2012-10-08 13:14:44.265 Voto[11968:907] doc URL: /var/mobile/Applications/07B8574A-A3BA-4B23-BB3F-995B33A01B95/Documents/Oct_08_2012_10_00_51.mp4
2012-10-08 13:14:45.343 Voto[11968:907] [MPAVController] Autoplay: Disabling autoplay for pause
2012-10-08 13:14:45.344 Voto[11968:907] [MPAVController] Autoplay: Disabling autoplay
2012-10-08 13:14:46.518 Voto[11968:907] [MPAVController] Autoplay: Skipping autoplay, disabled (for current item: 1, on player: 0)
2012-10-08 13:14:46.540 Voto[11968:907] [MPAVController] Autoplay: Enabling autoplay
2012-10-08 13:14:46.554 Voto[11968:907] [MPAVController] Autoplay: Likely to keep up or full buffer: 0
2012-10-08 13:14:46.555 Voto[11968:907] [MPAVController] Autoplay: Skipping autoplay, not enough buffered to keep up.
2012-10-08 13:14:46.557 Voto[11968:907] [MPAVController] Autoplay: Enabling autoplay
2012-10-08 13:14:46.567 Voto[11968:907] [MPCloudAssetDownloadController] Prioritization requested for media item ID: 0
2012-10-08 13:14:46.871 Voto[11968:907] [MPAVController] Autoplay: Enabling autoplay

所以，文件存在...我看过的问题:

MPMoviePlayer load and play movie saved in app documents

MPMoviePlayerController does not work with movie in documents folder

MPMoviePlayerViewController play movie from Documents directory - objective-c

我还检查了类引用，没有关于从文档播放的具体信息。我的项目设置:使用最新的 iOS 6，部署目标 5.0在 iOS6 iPhone 模拟器和装有 iOS 6 的 iPad 上进行测试。如果我忘了添加什么，请提醒我，我会立即添加。

请帮忙! :)

Answer 1

好吧，您没有以正确的方式构建文件 URL，您应该这样做:

NSString *docPath = [NSSearchPathForDirectoriesInDomains
                     (NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *docaPathFull = [docPath stringByAppendingPathComponent:@"/Oct_08_2012_10_00_51.mp4"];
NSURL *docUrl= [NSURL fileURLWithPath:docaPathFull];

您应该使用 NSString 的 stringByAppendingPathComponent 方法将目录和文件添加到路径；此外，在创建文件 URL 时，在 NSURL 上使用 fileURLWithPath:，这将为给定路径创建正确的 NSURL。