音乐播放器 AVAudioPlayer、定时器、UISlider

#import <UIKit/UIKit.h>

#import <AVFoundation/AVFoundation.h>

@interface ViewController : UIViewController

@property (strong, nonatomic) AVAudioPlayer *mediaPlayer;

@property (strong, nonatomic) UIButton *playBtn;

@property (strong, nonatomic) UIButton *stopBtn;

@property (strong, nonatomic) UIButton *pauseBtn;

@property (strong, nonatomic) UILabel *showLabel;

@property (strong, nonatomic) UISlider *processView;

@end

@implementation ViewController

NSTimer *timer;

NSString *totalTimeShowText;

- (void)viewDidLoad {

[super viewDidLoad];

// 播放器初始化 - 文件路径

NSURL *playFileUrl = [[NSBundle mainBundle]URLForResource:@"test" withExtension:@"mp3"];

_mediaPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:playFileUrl error:nil];

// 播放按钮

_playBtn = [[UIButton alloc]initWithFrame:CGRectMake(100, 100, 100, 50)];

_playBtn.backgroundColor = [UIColor grayColor];

[_playBtn setTitle:@"play" forState:UIControlStateNormal];

[_playBtn addTarget:self action:@selector(play) forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:_playBtn];

//暂停按钮

_stopBtn = [[UIButton alloc]initWithFrame:CGRectMake(300, 100, 100, 50)];

_stopBtn.backgroundColor = [UIColor grayColor];

[_stopBtn setTitle:@"stop" forState:UIControlStateNormal];

[_stopBtn addTarget:self action:@selector(stop) forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:_stopBtn];

//停止按钮

_pauseBtn = [[UIButton alloc]initWithFrame:CGRectMake(500, 100, 100, 50)];

_pauseBtn.backgroundColor = [UIColor grayColor];

[_pauseBtn setTitle:@"pause" forState:UIControlStateNormal];

[_pauseBtn addTarget:self action:@selector(pause) forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:_pauseBtn];

// 显示文字

_showLabel = [[UILabel alloc]initWithFrame:CGRectMake(100, 200, 800, 50)];

_showLabel.textColor = [UIColor redColor];

int totalTime = _mediaPlayer.duration;

int minuts = totalTime/60;

int seconds = totalTime%60;

NSString *minusShow = minuts < 10 ? [NSString stringWithFormat:@"0%i", minuts] : [NSString stringWithFormat:@"%i", minuts];

NSString *secondsShow = seconds < 10 ? [NSString stringWithFormat:@"0%i", seconds] : [NSString stringWithFormat:@"%i", seconds];

totalTimeShowText = [NSString stringWithFormat:@"%@:%@", minusShow, secondsShow];

_showLabel.text = [NSString stringWithFormat:@"00:00 %@", totalTimeShowText];

[self.view addSubview:_showLabel];

// 进度

_processView = [[UISlider alloc]initWithFrame:CGRectMake(100, 260, 500, 15)];

[_processView addTarget:self action:@selector(slideProcess) forControlEvents:UIControlEventValueChanged];

[self.view addSubview:_processView];

}

// 播放

-(void)play

{

NSLog(@"play...");

if(!_mediaPlayer.isPlaying)

{

[_mediaPlayer play];

}

if(!timer)

{

timer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(upgrocess) userInfo:nil repeats:YES];

}

}

//停止

-(void)stop

{

if(_mediaPlayer.isPlaying)

{

[_mediaPlayer stop];

}

}

//停止

-(void)pause

{

[_mediaPlayer pause];

}

// 更新进度

-(void)upgrocess

{

_processView.value = _mediaPlayer.currentTime/_mediaPlayer.duration;

int minus = _mediaPlayer.currentTime/60;

int seconds = (int)_mediaPlayer.currentTime%60;

NSString *minusShow = minus < 10 ? [NSString stringWithFormat:@"0%i", minus] : [NSString stringWithFormat:@"%i", minus];

NSString *secondsShow = seconds < 10 ? [NSString stringWithFormat:@"0%i", seconds] : [NSString stringWithFormat:@"%i", seconds];

NSString *currentTimeText = [NSString stringWithFormat:@"%@:%@", minusShow, secondsShow];

_showLabel.text = [NSString stringWithFormat:@"%@ / %@", currentTimeText, totalTimeShowText];

}

// 拖动

-(void)slideProcess

{

_mediaPlayer.currentTime = _mediaPlayer.duration * _processView.value;

[self upgrocess];

}