Simple audio playback for iOS

// 我使用的AVAudioPlayer, 首先先导入库文件, 写上头文件,签上代理#import "ViewController.h"#import <AVFoundation/AVFoundation.h>typedefNS_ENUM(NSInteger, playStatus){ // 这个枚举用来控制暂停和播放的切换    playStatusNo,    playStatusYes,     };@interfaceViewController ()<AVAudioPlayerDelegate>@property(nonatomic, assign) playStatus staus;@property(nonatomic, retain) UISlider *slider; // 进度条@property(nonatomic, retain) UILabel *timeLabel;@end

　　

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// 至于控件创建我就不一一写出来了 到这步是初始化播放器self.player = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURLfileURLWithPath:[[NSBundlemainBundle] pathForResource:@"1"ofType:@"mp3"]] error:nil];    _player.delegate = self;    [_player prepareToPlay]; //分配播放所需的资源，并将其加入内部播放队列 (预播放)

　　

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//  用NSTimer来监控音频播放进度        //  预订一个Timer,设置一个时间间隔。表示输入一个时间间隔对象，以秒为单位，一个>0的浮点类型的值，如果该值<0,系统会默认为0.1 self表发送的对象 useInfo此参数可以为nil，当定时器失效时，由你指定的对象保留和释放该定时器 repeat 为YES时，定时器会不断循环直至失效或被释放，当NO时，定时器会循环发送一次就失效。    _time = [NSTimerscheduledTimerWithTimeInterval:0.1 target:selfselector:@selector(updateslider) userInfo:nilrepeats:YES]; // 播放次数    UISwitch *loop = [[UISwitch alloc] initWithFrame:CGRectMake(100, 230, 60, 40)];    [loop addTarget:selfaction:@selector(loopYesOrNo) forControlEvents:UIControlEventValueChanged];    loop.on = NO; // 默认状态不打开        [self.view addSubview:loop];

　　

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// 实现点击按钮播放暂停- (void)buttonClickStart{        if(self.staus == playStatusYes) {        self.staus = playStatusNo;        [_player pause]; // 暂停播放;        [NSTimerscheduledTimerWithTimeInterval:0.1 target:selfselector:@selector(updateMusicTimeLabel) userInfo:selfrepeats:         YES];        [_button setTitle:@"暂停播放"forState:UIControlStateNormal];    }    else    {        [_player play]; // 开始播放        self.staus = playStatusYes;        [NSTimerscheduledTimerWithTimeInterval:0.1 target:selfselector:@selector(updateMusicTimeLabel) userInfo:selfrepeats:         YES];        [_button setTitle:@"正在播放"forState:UIControlStateNormal];    }}// 播放时间更新-(void)updateMusicTimeLabel{    if((int)self.player.currentTime % 60 < 10) {        self.timeLabel.text = [NSStringstringWithFormat:@"%d:0%d",(int)self.player.currentTime / 60, (int)self.player.currentTime % 60];    } else{        self.timeLabel.text = [NSString stringWithFormat:@"%d:%d",(int)self.player.currentTime / 60, (int)self.player.currentTime % 60];    }    }

　　

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// 循环播放- (void)loopYesOrNo{    _player.numberOfLoops = -1; // 这里 正数就是播放几次 -1 就是无限循环}// 进度条- (void)updateslider{    self.slider.value = self.player.currentTime;    }// 拖动进度条改变播放时间和播放位置- (void)sliderValueChanged{    [self.player stop];        [self.player setCurrentTime:self.slider.value];        [self.player prepareToPlay];        [self.player play];     }

Simple audio playback for iOS