UISlider 的 Avplayer 问题
Avplayer issues with UISlider
您好,我刚刚创建了 AVplayer 用于从服务器播放音频。我的问题是我的 UISlider
没有根据 Audioplayer 移动。请帮助我解决这个问题。
seekbar =[[UISlider alloc]init];
seekbar.frame=CGRectMake(10,CGRectGetMinY(PlayAudio.frame)-50, CGRectGetWidth(self.view.frame)-20, 20);
[seekbar addTarget:self action:@selector(seekTime:) forControlEvents:UIControlEventValueChanged];
seekbar.continuous=YES;
seekbar.minimumValue=0;
seekbar.maximumValue=20;
[self.view addSubview:seekbar];
-(void)Audio{
NSString *urlString= @"https.wav";
audioPlayer = [[AVPlayer alloc]initWithURL:[NSURL URLWithString:urlString]];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(playerItemDidReachEnd:)
name:AVPlayerItemDidPlayToEndTimeNotification
object:[audioPlayer currentItem]];
[NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(updateProgress) userInfo:nil repeats:YES];
[audioPlayer play];
}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
if (object == audioPlayer && [keyPath isEqualToString:@"status"]) {
if (audioPlayer.status == AVPlayerStatusFailed) {
NSLog(@"AVPlayer Failed");
} else if (audioPlayer.status == AVPlayerStatusReadyToPlay) {
NSLog(@"AVPlayerStatusReadyToPlay");
[audioPlayer play];
} else if (audioPlayer.status == AVPlayerItemStatusUnknown) {
NSLog(@"AVPlayer Unknown");
}
}
}
- (void)seekTime:(id)sender {
[seekbar setValue:CMTimeGetSeconds(audioPlayer.currentTime)];
}
seekTime
仅在用户移动滑块时调用。所以这不是更新它的好地方。
你应该有一个 updateProgress
方法,它从 NSTimer 调用,这是你需要更新滑块位置的地方:
- (void)updateProgress {
[seekbar setValue:CMTimeGetSeconds(audioPlayer.currentTime)];
}
所以每次 NSTimer 触发时,它应该更新滑块的位置。
在 seekTime
方法中,您应该执行相反的操作:将音频播放设置为用户选择的点。像这样:
[audioPlayer setCurrentTime:seekbar.value];
您好,我刚刚创建了 AVplayer 用于从服务器播放音频。我的问题是我的 UISlider
没有根据 Audioplayer 移动。请帮助我解决这个问题。
seekbar =[[UISlider alloc]init];
seekbar.frame=CGRectMake(10,CGRectGetMinY(PlayAudio.frame)-50, CGRectGetWidth(self.view.frame)-20, 20);
[seekbar addTarget:self action:@selector(seekTime:) forControlEvents:UIControlEventValueChanged];
seekbar.continuous=YES;
seekbar.minimumValue=0;
seekbar.maximumValue=20;
[self.view addSubview:seekbar];
-(void)Audio{
NSString *urlString= @"https.wav";
audioPlayer = [[AVPlayer alloc]initWithURL:[NSURL URLWithString:urlString]];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(playerItemDidReachEnd:)
name:AVPlayerItemDidPlayToEndTimeNotification
object:[audioPlayer currentItem]];
[NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(updateProgress) userInfo:nil repeats:YES];
[audioPlayer play];
}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
if (object == audioPlayer && [keyPath isEqualToString:@"status"]) {
if (audioPlayer.status == AVPlayerStatusFailed) {
NSLog(@"AVPlayer Failed");
} else if (audioPlayer.status == AVPlayerStatusReadyToPlay) {
NSLog(@"AVPlayerStatusReadyToPlay");
[audioPlayer play];
} else if (audioPlayer.status == AVPlayerItemStatusUnknown) {
NSLog(@"AVPlayer Unknown");
}
}
}
- (void)seekTime:(id)sender {
[seekbar setValue:CMTimeGetSeconds(audioPlayer.currentTime)];
}
seekTime
仅在用户移动滑块时调用。所以这不是更新它的好地方。
你应该有一个 updateProgress
方法,它从 NSTimer 调用,这是你需要更新滑块位置的地方:
- (void)updateProgress {
[seekbar setValue:CMTimeGetSeconds(audioPlayer.currentTime)];
}
所以每次 NSTimer 触发时,它应该更新滑块的位置。
在 seekTime
方法中,您应该执行相反的操作:将音频播放设置为用户选择的点。像这样:
[audioPlayer setCurrentTime:seekbar.value];