iOS_简单音乐播放器的实现

1、导入头文件：

#import <AVFoundation/AVFoundation.h>

2、音乐播放能用到的几个简单的属性

@property (nonatomic,strong) UIProgressView *musicProgress;
@property (nonatomic,strong) AVAudioPlayer *player;
@property (nonatomic,strong) NSTimer *timer;

3、加载一些基本控件

-(AVAudioPlayer *)player {
    if (!_player) {
        //获取音频文件
        NSString *music = [[NSBundle mainBundle] pathForResource:@"001" ofType:@"mp3"];
        NSURL *musicUrl = [NSURL fileURLWithPath:music];

        _player = [[AVAudioPlayer alloc] initWithContentsOfURL:musicUrl error:nil];
        //循环次数：1
        //numberOfLoops = -1 是无限循环
        _player.numberOfLoops = 1;
        [_player prepareToPlay];

    }
    return _player;
}

//创建UI控件
-(void)creatrUI {
    //创建button
    NSArray *array = [NSArray arrayWithObjects:@"开始",@"暂停",@"停止",nil];
    for (NSInteger i = 0; i < array.count; i++) {
        UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        btn.frame = CGRectMake(150, 100 + i *60 , 80, 40);
        [btn setTitle:array[i] forState:UIControlStateNormal];
        btn.tintColor = [UIColor blueColor];
        btn.backgroundColor = [UIColor orangeColor];
        btn.tag = 100 + i;
        [btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview:btn];
    }

    //创建音量调节
    UISlider *slider = [[UISlider alloc] initWithFrame:CGRectMake(0, 250, 400, 40)];
    [slider addTarget:self action:@selector(sliderValueChange:) forControlEvents:UIControlEventValueChanged];
    slider.value = 0.5;
    self.player.volume = slider.value;
    [self.view addSubview:slider];

    //创建进度条
    self.musicProgress = [[UIProgressView alloc] initWithFrame:CGRectMake(0, 330, 400, 40)];
    self.musicProgress.progressTintColor = [UIColor blueColor];
    self.musicProgress.progressViewStyle = UIProgressViewStyleDefault;
    [self.view addSubview:self.musicProgress];
}

- (void)viewDidLoad {
    [super viewDidLoad];
    [self creatrUI];
}

4、实现一些功能的方法：

//获取播放进度
-(void)updateTimer {
    //    当前时间/音频的总时间
    self.musicProgress.progress = self.player.currentTime / self.player.duration;
}

//音量调节
-(void)sliderValueChange:(UISlider *)slider {
    self.player.volume = slider.value;
}

//播放、暂停等功能的实现
-(void)btnClick:(UIButton *)btn {
    if (btn.tag == 100) {
        NSLog(@"开始");
        [self.player play];
        self.timer = [NSTimer scheduledTimerWithTimeInterval:0.2 target:self selector:@selector(updateTimer) userInfo:nil repeats:YES];
    }else if (btn.tag == 101) {
        NSLog(@"暂停");
        [self.player pause];
    }else if (btn.tag == 102) {
        NSLog(@"停止");
        [self.player stop];
        self.player.currentTime = 0;
    }
}

/*
 <AVAudioPlayerDelegate>
 当播放结束后调用：
*/
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag {
    [self.timer invalidate];
}

这样，一个可以实现音乐播放的简单的小程序就完成了，可以自己测试一下