IOS多媒体

音乐播放器

  1 #import "ViewController.h"
  2
  3 @interface ViewController ()
  4
  5 @end
  6
  7 @implementation ViewController
  8
  9 - (void)viewDidLoad {
 10     [super viewDidLoad];
 11     // Do any additional setup after loading the view, typically from a nib.
 12     dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
 13     dispatch_async(queue, ^{
 14         // 创建一个定时器
 15         [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(timerAction:) userInfo:nil repeats:YES];
 16
 17         // 保持线程活跃
 18         [[NSRunLoop currentRunLoop] run];
 19     });
 20
 21 //    播放
 22     play1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
 23     play1.frame = CGRectMake(30, 360, 90, 35);
 24     play1.backgroundColor = [UIColor redColor];
 25     [play1 setTitle:@"播放" forState:UIControlStateNormal];
 26     [play1 addTarget:self action:@selector(playAction:) forControlEvents:UIControlEventTouchUpInside];
 27
 28     [self.view addSubview:play1];
 29 //    停止播放
 30     stop = [UIButton buttonWithType:UIButtonTypeRoundedRect];
 31     stop.frame = CGRectMake(30, 260, 90, 35);
 32     stop.backgroundColor = [UIColor redColor];
 33     [stop setTitle:@"停止" forState:UIControlStateNormal];
 34     [stop addTarget:self action:@selector(stopAction:) forControlEvents:UIControlEventTouchUpInside];
 35     [self.view addSubview:stop];
 36 //    暂停播放
 37     pause = [UIButton buttonWithType:UIButtonTypeRoundedRect];
 38     pause.frame = CGRectMake(30, 160, 90, 35);
 39     pause.backgroundColor = [UIColor redColor];
 40     [pause setTitle:@"暂停" forState:UIControlStateNormal];
 41     [pause addTarget:self action:@selector(pauseAction:) forControlEvents:UIControlEventTouchUpInside];
 42     [self.view addSubview:pause];
 43 //    声音UILabel
 44     sound = [[UILabel alloc] initWithFrame:CGRectMake(90, 210, 100, 20)];
 45     sound.text = @"声音：";
 46     [self.view addSubview:sound];
 47 //    声音UISlider
 48     audioPlayer = [[UISlider alloc] initWithFrame:CGRectMake(150, 170, 200, 100)];
 49     [audioPlayer addTarget:self action:@selector(audioSilderChanged:) forControlEvents:UIControlEventValueChanged];
 50
 51     [self.view addSubview:audioPlayer];
 52 //    进度UISlider
 53     _timeSlider = [[UISlider alloc] initWithFrame:CGRectMake(160, 270, 150, 100)];
 54     [_timeSlider addTarget:self action:@selector(timeSliderChanged:) forControlEvents:UIControlEventValueChanged];
 55     [self.view addSubview:_timeSlider];
 56 //    当前进度
 57     _startTimeLabel = [[UILabel alloc] initWithFrame:CGRectMake(130, 270, 100, 100)];
 58     [self.view addSubview:_startTimeLabel];
 59 //    音乐总长
 60     _endTimeLabel = [[UILabel alloc] initWithFrame:CGRectMake(320, 270, 100, 100)];
 61     [self.view addSubview:_endTimeLabel];
 62     _audioPlayer.delegate = self;
 63
 64
 65 }
 66 - (void)timerAction:(NSTimer *)timer
 67 {
 68     // 回到主线程刷新UI
 69     dispatch_async(dispatch_get_main_queue(), ^{
 70         _startTimeLabel.text = [NSString stringWithFormat:@"%d",(int)_audioPlayer.currentTime];
 71         _timeSlider.value = _audioPlayer.currentTime;
 72     });
 73 }
 74
 75 -(void)pauseAction:(UIButton *)pause{
 76     [_audioPlayer pause];
 77 }
 78 -(void)stopAction:(UIButton *)stop{
 79     [_audioPlayer stop];
 80     _audioPlayer = nil;
 81 }
 82 -(void)audioSilderChanged:(UISlider *)audio{
 83     UISlider *slider = (UISlider *)audioPlayer;
 84     // 7.设置音量的大小
 85     _audioPlayer.volume = slider.value;
 86
 87
 88 }
 89 -(void)playAction:(UIButton *)pl{
 90     if (_audioPlayer == nil) {
 91         // 1.音乐文件的路径
 92         NSString *urlString = [[NSBundle mainBundle] pathForResource:@"王绎龙-邻家美眉" ofType:@"mp3"];
 93         // 2.转化成本地路径
 94         NSURL *url = [NSURL fileURLWithPath:urlString];
 95         // 3.创建播放对象
 96         _audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
 97         _audioPlayer.numberOfLoops = -1;
 98
 99         // 5.记录音乐的总时长   duration声音的持续时间
100         _startTimeLabel.text = @"0";
101         //    音乐总长UILabel
102         _endTimeLabel.text = [NSString stringWithFormat:@"%d",(int)_audioPlayer.duration];
103         // 6.设置滑条的参数
104         _timeSlider.minimumValue = 0;
105         _timeSlider.maximumValue = _audioPlayer.duration;
106         // 7.设置音量的大小
107         _audioPlayer.volume = 0.0;
108     }
109
110     // 5.播放
111     [_audioPlayer play];
112 }
113 -(void)timeSliderChanged:(UISlider *)time{
114     // 播放进度的改变
115     _audioPlayer.currentTime = _timeSlider.value;
116 }
117
118 @end