音乐播放器的歌曲进度调节和音量大小调节实现

.h文件的全局变量

#import

#import

@interface PlayerViewController : UIViewController

{

    AVAudioPlayer *_play;

    UISlider *_timeSlider;

    UISlider *_volumeSlider;

    UILabel *_timeLable;

    

}

@property(nonatomic,assign)NSInteger time;

@end

.m文件的实现

#import "PlayerViewController.h"

#import "MPPlayController.h"

@interface PlayerViewController ()

@end

@implementation PlayerViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    

    self.title = @"音乐播放";

    

    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"安静" ofType:@"mp3"];

    NSURL *urlStr = [[NSURL alloc] initFileURLWithPath:filePath];

    _play = [[AVAudioPlayer alloc] initWithContentsOfURL:urlStr error:nil];

//    _play.currentTime = 0.0;

    _play.volume = 20;

    //加入播放序列

    [_play prepareToPlay];

    

    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];

    button.frame = CGRectMake((375-80)/2, 50, 80, 30);

    [button setTitle:@"音乐" forState:UIControlStateNormal];

    [button addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:button];

    //音量滑动条

    _volumeSlider = [[UISlider alloc] init];

    _volumeSlider.frame = CGRectMake(100, 150, 130, 20);

    _volumeSlider.minimumValue = 0;

    _volumeSlider.maximumValue = 100;

    _volumeSlider.value = _play.volume;

    [_volumeSlider addTarget:self action:@selector(volumeAction) forControlEvents:UIControlEventValueChanged];

    [self.view addSubview:_volumeSlider];

    

    //音量Lable

    UILabel *volumeLable = [[UILabel alloc] initWithFrame:CGRectMake(20, 150, 40, 20)];

    volumeLable.text = @"音量";

    [self.view addSubview:volumeLable];

    

   

    

    //时间进度条

    _timeSlider = [[UISlider alloc] initWithFrame:CGRectMake(20, 250, 320,20)];

    

//    _timeSlider.value = 0.0;

    _timeSlider.minimumValue = 0;

    _timeSlider.maximumValue = 335;

    [_timeSlider addTarget:self action:@selector(sliderAction) forControlEvents:UIControlEventValueChanged];

    [self.view addSubview:_timeSlider];

    //时间

    _timeLable = [[UILabel alloc] initWithFrame:CGRectMake(150, 200,80, 20)];

    _timeLable.text = @"时间:";

    

    

    [self.view addSubview:_timeLable];

    

    //视频按钮

    UIButton *mediaButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];

    mediaButton.frame = CGRectMake(140, 400, 50, 30);

    [mediaButton setTitle:@"播放" forState:UIControlStateNormal];

    [mediaButton addTarget:self action:@selector(mediaButtonAction) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:mediaButton];

    

    

}

- (void)buttonAction:(UIButton *)btn{

    

    

    if (_play.playing) {

        

        [btn setTitle:@"暂停" forState:UIControlStateNormal];

        [_play pause];

    }else{

        [btn setTitle:@"开始" forState:UIControlStateNormal];

    [_play play];

    }

    

    [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(timeAction:) userInfo:nil repeats:YES];

    

}

//播放进度条事件

- (void)sliderAction{

    //移动滑动条时让播放的进度达到一致

    _play.currentTime = _timeSlider.value;

    //让滑动条到播放的位置

    _time = _timeSlider.value;

}

//定时器方法

- (void)timeAction:(NSTimer *)timer{

    if (_play.playing) {

        _time++;

        _timeSlider.value = _time;

        _timeLable.text = [NSString stringWithFormat:@"时间：%ld",_time];

    }else{

        [timer invalidate];

    }

    

    

}

//音量条滑动条的事件

- (void)volumeAction{

    

    _play.volume = _volumeSlider.value;

}

此功能实现了简单的一首歌曲的播放进度随意拖动到想播放的地方，音量大小的的调节。（按住滑动条滑动即可）