使用滑块更改iphone sdk中AVAudioPlayer中的音量 [英] using slider change the volume in AVAudioPlayer in iphone sdk

问题描述

我正在使用此代码

NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/audiofile.mp3", [[NSBundle mainBundle] resourcePath]]];

NSError *error;
player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
player.numberOfLoops = -1;

if (player == nil)
    NSLog(@"%@",[error description]);             
else 
    [player play];  

但是我想更改音量，如何获取音量详细信息?

but i want to change the volume so how can i get the volume detail?

推荐答案

设置UISlider.注册它以在IB或以编程方式接收ValueChanged事件.将其最小值设置为0，将最大值设置为100.应该是这样.

Set up your UISlider. Register it to receive the ValueChanged events in IB or programmatically. Set its min value to 0 and max to 100. And that should be it.

- (void)sliderValueChanged:(UISlider *)slider {
  myPlayer.volume = slider.value / 100.0;
}

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