Can't Play AVPLayer Local Video from

问题

So I am building a custom video player using AVFoundation - AVPlayer and AVPlayerLayer. Currently, all I want the player to do is play a video in the asset library with a hardcoded url to that video. I would like this to be contained in a SubClass of UIView so I can use it all around my app.

Here is my code so far: CUPlayer.h:

@interface CUPlayer : UIView

{
    AVPlayer *player;
    AVPlayerLayer *playerLayer;
    AVPlayerItem *item;
    NSURL *url;
}


@property(nonatomic) UIViewAutoresizing autoresizingMask;
@end

CUPlayer.m:

@implementation CUPlayer

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) 
    {
        // Initialization code
        self.backgroundColor = [UIColor redColor];
        [self setupURL];
    }
    return self;
}


-(void)setupURL
{
    NSLog(@"URL setting up");
    NSString *string = @"assets-library://asset/asset.mov?id=0A937F0D-6265-452D-8800-   1A760E8E88B9&ext=mov";
    url = [[NSURL alloc] initFileURLWithPath: string];
    [self setupPlayerForURL];
}

-(void)setupPlayerForURL
{
    AVAsset *asset = [AVURLAsset URLAssetWithURL:url options:nil];
    item = [AVPlayerItem playerItemWithAsset:asset];
    player = [AVPlayer playerWithPlayerItem:item];
    [player addObserver:self forKeyPath:@"status" options:0 context:nil];
    playerLayer = [AVPlayerLayer playerLayerWithPlayer:player];


    //player.actionAtItemEnd = AVPlayerActionAtItemEndNone;

    [self.layer addSublayer:playerLayer];
    playerLayer.frame = CGRectMake(0, 0, 200, 200);
    //[playerLayer setBackgroundColor:[UIColor greenColor].CGColor];
}



- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {

    if (object == player && [keyPath isEqualToString:@"status"]) {
         if (player.status == AVPlayerStatusFailed) {
            NSLog(@"AVPlayer Failed");
         } else if (player.status == AVPlayerStatusReadyToPlay) {
            NSLog(@"AVPlayer Ready to Play");
            [player play];
         } else if (player.status == AVPlayerItemStatusUnknown) {
             NSLog(@"AVPlayer Unknown");
        }
    }
}

And then I am calling this from the View Controller:

CUPlayer *cuPlayer = [[CUPlayer alloc]initWithFrame:CGRectMake(0, 0, 250, 250)];
[self.view addSubview:cuPlayer];

This complies but just give me a red square without the video playing. The URL to the local file is definitely correct. I can get it working if I hold all the code in the view controller and run the play in -(void)viewDidLayoutSubviews.

Help would very much be appreciated, I have read all the documentation multiple times trying to work this thing out.

Tom

来源：https://stackoverflow.com/questions/14253373/cant-play-avplayer-local-video-from

标签

ios

objective-c

xcode

avfoundation

avplayer