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