Question

我见过很多人都面临这个问题。尝试过实现他们的一些解决方案（声明moviePlayer的属性，明确设置_moviePlayer.contentURL。但它仍然显示黑屏（iOS7）。

以下是代码：

MoviePlayer.h

#import <UIKit/UIKit.h>
#import <MediaPlayer/MediaPlayer.h>

@interface MoviePlayer : UIViewController

@property (nonatomic, strong) MPMoviePlayerController *moviePlayer;
@property (nonatomic,weak) NSURL *vidURL;

@end

MoviePlayer.m

#import "MoviePlayer.h"

@interface MoviePlayer ()

@end

@implementation MoviePlayer


-(void)viewDidLoad {
    [super viewDidLoad];
    _moviePlayer = [[MPMoviePlayerController alloc]initWithContentURL:_vidURL];
    NSLog(@"%@", _vidURL);
    _moviePlayer.controlStyle = MPMovieControlStyleFullscreen;


    CGAffineTransform landscapeTransform;
    landscapeTransform = CGAffineTransformMakeRotation(90*M_PI/180.0f);
    landscapeTransform = CGAffineTransformTranslate(landscapeTransform, 80, 80);


    _moviePlayer.view.transform = landscapeTransform;
    _moviePlayer.contentURL = _vidURL;
    [_moviePlayer.view setFrame:self.view.bounds];
    [self.view addSubview:_moviePlayer.view];
}

@end

打印出NSLog ：

assets-library://asset/asset.mov?id=07E61ABA-3EEB-461B-B170-000E7AE3F9A8&ext=mov

更新

vidURL从另一个viewControlelr传递：

-(void) collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
    ALAsset *asset = self.assets[indexPath.row];
    ALAssetRepresentation *defaultRep = [asset defaultRepresentation];

    NSURL *vidURL = [defaultRep url];

    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard_iPad" bundle:nil];
    MoviePlayer *moviePController = [storyboard instantiateViewControllerWithIdentifier:@"moviePlayer"];
    moviePController.vidURL = vidURL;
    [self.navigationController presentViewController:moviePController animated:YES completion:nil];
}

Answer 1

尝试注册MPMoviePlayerLoadStateDidChangeNotification 和MPMoviePlayerPlaybackDidFinishNotification 并使用

if (self.player.loadState ==MPMoviePlaybackStateInterrupted) {

    NSLog(@"MPMoviePlaybackStateInterrupted");
}else if (self.player.loadState ==MPMoviePlaybackStatePaused) {
    // [self RemoveVideoCache];
    NSLog(@"MPMoviePlaybackStatePaused");
}else if (self.player.loadState ==MPMoviePlaybackStateSeekingBackward) {
    // [self RemoveVideoCache];
    NSLog(@"MPMoviePlaybackStateSeekingBackward");
}
else if (self.player.loadState ==MPMoviePlaybackStateSeekingForward) {

    NSLog(@"MPMoviePlaybackStateSeekingForward");
}else if (self.player.loadState ==MPMoviePlaybackStateStopped) {

    NSLog(@"MPMoviePlaybackStateStopped");
}

Answer 2

原来我只是在将其添加为子视图后才能播放它：

[_moviePlayer play];

MPViewController显示黑屏

2 个答案: