我目前有一个 AVQueuePlayer 按顺序播放几个 .aif 文件。当它通过每个音频时,我想执行与该特定声音相关的操作(例如更改 ImageView 的 uiimage)。
我的问题是正确设置 NSNotification。我已将其设置为在队列完成最后一个对象时通知我,但我无法接收每个当前项目的通知。这是我所拥有的:
//Setting Up My Queue List
yellowVoice = [[AVPlayerItem alloc] initWithURL:[NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/YellowVoice.aif", [[NSBundle mainBundle] resourcePath]]]];
orangeVoice = [[AVPlayerItem alloc] initWithURL:[NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/OrangeVoice.aif", [[NSBundle mainBundle] resourcePath]]]];
redVoice = [[AVPlayerItem alloc] initWithURL:[NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/RedVoice.aif", [[NSBundle mainBundle] resourcePath]]]];
pinkVoice = [[AVPlayerItem alloc] initWithURL:[NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/PinkVoice.aif", [[NSBundle mainBundle] resourcePath]]]];
NSArray *soundEmotions = [NSArray arrayWithObjects:yellowVoice, orangeVoice, redVoice, pinkVoice, nil];
soundQueue = [AVQueuePlayer queuePlayerWithItems:soundEmotions];
// Notify me when queue reaches the end of the last player item
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(playerItemDidReachEnd:)
name:AVPlayerItemDidPlayToEndTimeNotification
object:[soundEmotions lastObject]];
// Notify me when a new player item begins and which one it is
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(currentItemIs:)
name:AVPlayerItemDidPlayToEndTimeNotification
object:[soundQueue currentItem]];
[soundQueue play];
我觉得我被 name 参数卡住了。我应该把它改成什么?我如何在切换时找出当前正在播放的播放器项目的名称?谢谢!
//Here is one of the things I want to do with that info
- (void)currentItemIs:(NSNotification *)notification {
if (soundQueue.currentItem ==yellowVoice) {
UIImage * yellowImage = [UIImage imageNamed:@"yellow.png"];
[UIView transitionWithView:self.view
duration:1.0f
options:UIViewAnimationOptionTransitionCrossDissolve
animations:^{
mainImage.image = yellowImage;
} completion:NULL];
}
if (soundQueue.currentItem ==yellowVoice) {
UIImage * orangeImage = [UIImage imageNamed:@"orange.png"];
[UIView transitionWithView:self.view
duration:1.0f
options:UIViewAnimationOptionTransitionCrossDissolve
animations:^{
mainImage.image = orangeImage;
} completion:NULL];
}
}
最佳答案
- (void)currentItemIs:(NSNotification *)notification
{
AVPlayerItem *p = [notification object];
if (p ==yellowVoice) {
//rest of the code
}
}
关于ios - 检测 AVQueuePlayer 中的当前项并知道它何时更改?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/15346127/