AvAudioPlayer无法正常工作? [英] AvAudioPlayer not working?

问题描述

我创建了AVAudioPlayer对象，并在场景中播放音乐，如果我过渡到另一个场景，然后回到原始场景，它将创建另一个对象，并播放相同的音轨两次.我该如何克服呢?

I create the AVAudioPlayer object and play the music within the scene, if i transition through to another scene and then go back to the original scene it creates another object and plays the same soundtrack twice. How do i overcome this ?

  NSURL *url = [[NSBundle mainBundle] URLForResource:@"backgroundMusic" withExtension:@"mp3"];
    self.backgroundMusic = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
    self.backgroundMusic.numberOfLoops = -1;
    [self.backgroundMusic prepareToPlay];



    if (self.backgroundMusic.playing == NO) {
        [self.backgroundMusic play];
    }

推荐答案

您想做什么? 您是否只想在该场景中播放音乐?好吧，在过渡之前，请停止avaudioplayer.

Well what do you want to do? Do you want to play music only in that scene? Well then before you transition, stop the avaudioplayer.

   [audioplayer stop];

或者，也许您想在场景中开始播放音乐，然后让它在离开场景或返回场景时继续播放?

Or, maybe you want to start music in the scene, and let it just continue playing if you leave the scene or go back to the scene?

那么，您将需要一个单独的音乐包装器类.创建一个班级，然后打电话给它播放音乐.您可以检查.playing属性以了解音乐是否已经在播放.

Well then you would need a seperate wrapper class for your music. Create a class, and just put a call to it to play music. You can check the .playing property to know if music is already playing or not.

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