简单的音乐播放 导入AVFoundation.framework
- (void)viewDidLoad { [super viewDidLoad]; //路径 NSString* path = [[NSBundle mainBundle] pathForResource:@"xiguan" ofType:@"mp3"]; //路径->url NSURL* url = [NSURL fileURLWithPath:path]; _player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil]; //准备播放 [_player prepareToPlay]; //支持变速 _player.enableRate = YES; //峰值 平均值 _player.meteringEnabled = YES; } //进度 - (IBAction)proSlider:(id)sender{ //当前时间=总时间*slider.value; float currentTime = _player.duration * _proSlider.value; [_player setCurrentTime:currentTime]; } //声道 - (IBAction)panSlider:(id)sender{ _player.pan = _panSlider.value; } //速度 - (IBAction)speedSlider:(id)sender{ _player.rate = _speedSlider.value; } //声音 - (IBAction)volSlier:(id)sender{ _player.volume = _volSlider.value; } - (void)play:(id)sender{ [_player play]; //播放时候开启定时器 _timer = [NSTimer scheduledTimerWithTimeInterval:1/60.0 target:self selector:@selector(refresh) userInfo:nil repeats:YES]; } - (void)pause:(id)sender{ [_player pause]; //暂定的时候定时器失效 [_timer invalidate]; } - (void)refresh{ //当前时间/总时间 float pro = _player.currentTime / _player.duration; [_proSlider setValue:pro animated:YES]; //刷新峰值平均值 [_player updateMeters]; float peak = ([_player peakPowerForChannel:0] + 50) / 50; float ave = ([_player averagePowerForChannel:0] + 50) / 50; [_proV setProgress:peak animated:YES]; [_proV2 setProgress:ave animated:YES]; } /////播放系统声音 SystemSoundID myAlertSound; NSURL *url = [NSURL URLWithString:@"/System/Library/Audio/UISounds/alarm.caf"]; /* low_power.caf alarm.caf SentMessage.caf */ AudioServicesCreateSystemSoundID((__bridge CFURLRef)(url), &myAlertSound); AudioServicesPlaySystemSound(myAlertSound);