[英]iOS: AVPlayerViewController view not removing
我使用AVPlayerViewController
创建了一个示例视频应用程序。 一切正常。 但是问题出在视频播放完毕后, AVPlayerViewController
视图并未移除。 另一个问题是在横向模式全屏下为肖像默认大小设置AVPlayerViewController
的约束。 我是新来的约束。 请下载项目并运行项目记录器,以显示约束问题。
源代码项目: http : //www.filedropper.com/avplayerdemos
我发现您的代码有两个问题:
asset loadValuesAsynchronouslyForKeys:requestedKeys completionHandler: ^{
dispatch_async(
dispatch_get_main_queue(), ^{
if (!asset.playable) {
return;
} else {
[self prepareToPlayAsset: asset withRequestedKeys: requestedKeys];
}
if (videoPlayerItem) {
[videoPlayerItem removeObserver:self forKeyPath:kkStatusKey];
[[NSNotificationCenter defaultCenter] removeObserver:self
name:AVPlayerItemDidPlayToEndTimeNotification
object: videoPlayerItem];
}
});
}];
上面的这段代码添加了观察者,然后移除了。 因此应更改两个:
[asset loadValuesAsynchronouslyForKeys:requestedKeys completionHandler: ^{
dispatch_async(
dispatch_get_main_queue(), ^{
if (videoPlayerItem) {
[videoPlayerItem removeObserver:self forKeyPath:kkStatusKey];
[[NSNotificationCenter defaultCenter] removeObserver:self
name:AVPlayerItemDidPlayToEndTimeNotification
object: videoPlayerItem];
}
if (!asset.playable) {
return;
} else {
[self prepareToPlayAsset: asset withRequestedKeys: requestedKeys];
}
});
}];
问题2:
- (void)prepareToPlayAsset: (AVURLAsset *)asset withRequestedKeys: (NSArray *)requestedKeys {
for (NSString *thisKey in requestedKeys) {
NSError *error = nil;
AVKeyValueStatus keyStatus = [asset statusOfValueForKey:thisKey error:&error];
switch (keyStatus) {
case AVKeyValueStatusUnknown:
NSLog(@"%@ AVKeyValueStatusUnknown", thisKey);
break;
case AVKeyValueStatusFailed:
NSLog(@"Error! PlayAsset failed.\nAVKey : %@.\nError: %@", thisKey, error);
return;
break;
case AVKeyValueStatusLoading:
NSLog(@"%@ AVKeyValueStatusLoading", thisKey);
break;
case AVKeyValueStatusCancelled:
NSLog(@"%@ AVKeyValueStatusCancelled", thisKey);
break;
case AVKeyValueStatusLoaded: {
videoPlayerItem = [AVPlayerItem playerItemWithAsset: asset];
[videoPlayerItem addObserver:self forKeyPath: kkStatusKey options:0 context:nil];
videoPlayer = [AVPlayer playerWithPlayerItem: videoPlayerItem];
/**
* Creating the videoAdplayer through passing the avplayer object
*/
[self createVideoPlayer: videoPlayer];
if ([thisKey isEqualToString: @"duration"]) {
} else if ([thisKey isEqualToString: @"tracks"]) {
NSLog(@"\n\n asset.tracks : %@ \n\n", asset.tracks);
} else if ([thisKey isEqualToString: @"metadata"]) {
NSLog(@"\n\n assetMetadata : %@ \n\n", asset.metadata);
}
}
break;
default:
break;
}
}
if (!asset.playable) {
return;
}
}
在此循环中,只需检查运输负载并返回失败。 在这种情况下,有2个键,这样的代码将添加两个childviewcontroller
并将播放两个项目播放器。 因此,将代码更改为:
- (void)prepareToPlayAsset: (AVURLAsset *)asset withRequestedKeys: (NSArray *)requestedKeys {
for (NSString *thisKey in requestedKeys) {
NSError *error = nil;
AVKeyValueStatus keyStatus = [asset statusOfValueForKey:thisKey error:&error];
switch (keyStatus) {
case AVKeyValueStatusUnknown:
NSLog(@"%@ AVKeyValueStatusUnknown", thisKey);
break;
case AVKeyValueStatusFailed:
NSLog(@"Error! PlayAsset failed.\nAVKey : %@.\nError: %@", thisKey, error);
return;
break;
case AVKeyValueStatusLoading:
NSLog(@"%@ AVKeyValueStatusLoading", thisKey);
break;
case AVKeyValueStatusCancelled:
NSLog(@"%@ AVKeyValueStatusCancelled", thisKey);
break;
case AVKeyValueStatusLoaded: {
}
break;
default:
break;
}
}
videoPlayerItem = [AVPlayerItem playerItemWithAsset: asset];
[videoPlayerItem addObserver:self forKeyPath: kkStatusKey options:0 context:nil];
videoPlayer = [AVPlayer playerWithPlayerItem: videoPlayerItem];
/**
* Creating the videoAdplayer through passing the avplayer object
*/
[self createVideoPlayer: videoPlayer];
if (!asset.playable) {
return;
}
}
我很确定您的演示。 像这样更改,它将正常运行。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.