音频视频

一、音频

音乐播放用到一个叫做AVAudioPlayer的类，这个类可以用于播放手机本地的音乐文件。

AVAudioPlayer类依赖于AVFoundation框架，因此使用该类必须先导入AVFoundation框架，并包含其头文件（包含主头文件即可）。

//1.音乐文件的路径

NSString *urlString = [[NSBundle mainBundle] pathForResource:@"王绎龙-邻家美眉" ofType:@"mp3"];

//2.转化成本地路径

NSURL *url = [NSURL fileURLWithPath:urlString];

//3.创建播放对象

_audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];

//5.记录音乐的总时长   duration声音的持续时间

@property(readonly) NSTimeInterval duration;

//6.设置音量的大小

@property float volume

设置播放次数

 @property float numberOfLoops = 0;

 

//播放   暂停 停止

• (BOOL)play;
• (void)pause;
• (void)stop;

//播放进度的改变

@property NSTimeInterval currentTime;

 

代码：

//    添加背景图片
    imageview = [[UIImageView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    imageview.image = [UIImage imageNamed:@"1.jpg"];

    [self.view addSubview:imageview];

//    添加播放按钮
    btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    btn.frame = CGRectMake(150, 180, 100, 100);
    btn.tintColor = [UIColor redColor];
    [btn setTitle:@"播放" forState:UIControlStateNormal];
    [btn addTarget:self action:@selector(btnAction:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btn];
//    添加暂停按钮
    btn1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    btn1.frame = CGRectMake(180, 380, 100, 100);
    btn1.tintColor = [UIColor redColor];
    [btn1 setTitle:@"暂停" forState:UIControlStateNormal];
    [btn1 addTarget:self action:@selector(btn1Action:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btn1];
//    添加停止按钮
    btn2 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    btn2.frame = CGRectMake(130, 380, 30, 100);
    btn2.tintColor = [UIColor redColor];
    [btn2 setTitle:@"停止" forState:UIControlStateNormal];
    [btn2 addTarget:self action:@selector(btn2Action:) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:btn2];

//播放事件
-(void)btnAction:(UIButton *)bt
{
    if (player == nil){
    NSString *path = [[NSBundle mainBundle]pathForResource:@"王绎龙-邻家美眉" ofType:@"mp3"];
    NSURL *url = [NSURL fileURLWithPath:path];
   
    player = [[AVAudioPlayer alloc]initWithContentsOfURL:url error:nil];
    }
//    开始播放
    [player play];

}
//暂停播放事件
-(void)btn1Action:(UIButton *)bt1
{
//    暂停播放
    [player pause];
   
}
//停止播放事件
-(void)btn2Action:(UIButton *)bt2
{
//    播放停止
    [player stop];
    player = nil;

}

 

   ／／／／／／／／／／／音频代码（block方法）功能／／／／／／／／／／／／

 

- (void)viewDidLoad {
    [super viewDidLoad];
   
    dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
    dispatch_async(queue, ^{
        // 创建一个定时器
        [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(timerAction:) userInfo:nil repeats:YES];
       
        // 保持线程活跃
        [[NSRunLoop currentRunLoop] run];
    });

//    播放
    play1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    play1.frame = CGRectMake(30, 360, 90, 35);
    play1.backgroundColor = [UIColor redColor];
    [play1 setTitle:@"播放" forState:UIControlStateNormal];
    [play1 addTarget:self action:@selector(playAction:) forControlEvents:UIControlEventTouchUpInside];
   
    [self.view addSubview:play1];
//    停止播放
    stop = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    stop.frame = CGRectMake(30, 260, 90, 35);
    stop.backgroundColor = [UIColor redColor];
    [stop setTitle:@"停止" forState:UIControlStateNormal];
    [stop addTarget:self action:@selector(stopAction:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:stop];
//    暂停播放
    pause = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    pause.frame = CGRectMake(30, 160, 90, 35);
    pause.backgroundColor = [UIColor redColor];
    [pause setTitle:@"暂停" forState:UIControlStateNormal];
    [pause addTarget:self action:@selector(pauseAction:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:pause];
//    声音UILabel
    sound = [[UILabel alloc] initWithFrame:CGRectMake(90, 210, 100, 20)];
    sound.text = @"声音：";
    [self.view addSubview:sound];
//    声音UISlider
    audioPlayer = [[UISlider alloc] initWithFrame:CGRectMake(150, 170, 200, 100)];
    [audioPlayer addTarget:self action:@selector(audioSilderChanged:) forControlEvents:UIControlEventValueChanged];
   
    [self.view addSubview:audioPlayer];
//    进度UISlider
    _timeSlider = [[UISlider alloc] initWithFrame:CGRectMake(160, 270, 150, 100)];
    [_timeSlider addTarget:self action:@selector(timeSliderChanged:) forControlEvents:UIControlEventValueChanged];
    [self.view addSubview:_timeSlider];
//    当前进度
    _startTimeLabel = [[UILabel alloc] initWithFrame:CGRectMake(130, 270, 100, 100)];
    [self.view addSubview:_startTimeLabel];
//    音乐总长
    _endTimeLabel = [[UILabel alloc] initWithFrame:CGRectMake(320, 270, 100, 100)];
    [self.view addSubview:_endTimeLabel];
    _audioPlayer.delegate = self;
   
 
}
- (void)timerAction:(NSTimer *)timer
{
    // 回到主线程刷新UI
    dispatch_async(dispatch_get_main_queue(), ^{
        _startTimeLabel.text = [NSString stringWithFormat:@"%d",(int)_audioPlayer.currentTime];
        _timeSlider.value = _audioPlayer.currentTime;
    });
}

-(void)pauseAction:(UIButton *)pause{
    [_audioPlayer pause];
}
-(void)stopAction:(UIButton *)stop{
    [_audioPlayer stop];
    _audioPlayer = nil;
}
-(void)audioSilderChanged:(UISlider *)audio{
    UISlider *slider = (UISlider *)audioPlayer;
    // 7.设置音量的大小
    _audioPlayer.volume = slider.value;
   
   
}
-(void)playAction:(UIButton *)pl{
    if (_audioPlayer == nil) {
        // 1.音乐文件的路径
        NSString *urlString = [[NSBundle mainBundle] pathForResource:@"王绎龙-邻家美眉" ofType:@"mp3"];
        // 2.转化成本地路径
        NSURL *url = [NSURL fileURLWithPath:urlString];
        // 3.创建播放对象
        _audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
        _audioPlayer.numberOfLoops = -1;

        // 5.记录音乐的总时长  duration声音的持续时间
        _startTimeLabel.text = @"0";
        //    音乐总长UILabel
        _endTimeLabel.text = [NSString stringWithFormat:@"%d",(int)_audioPlayer.duration];
        // 6.设置滑条的参数
        _timeSlider.minimumValue = 0;
        _timeSlider.maximumValue = _audioPlayer.duration;
        // 7.设置音量的大小
        _audioPlayer.volume = 0.0;
    }
   
    // 5.播放
    [_audioPlayer play];
}
-(void)timeSliderChanged:(UISlider *)time{
    // 播放进度的改变
    _audioPlayer.currentTime = _timeSlider.value;
}

@end

 

   ／／／／／／／／／音频（系统）／／／／／／／／／／／

-----设置支持后台播放------

    NSError *error;
    AVAudioSession *audionSession = [AVAudioSession sharedInstance];
    [audionSession setCategory:AVAudioSessionCategoryPlayback error:&error];
   
   
    // 1.获取音频的url
    NSString *urlString = @"http://yinyueshiting.baidu.com/data2/music/122092051/693143255600128.mp3?xcode=fcdab48f5e8e1bfeabce6f1886feb9701b23d208676f9a7d";
    NSURL *url = [NSURL URLWithString:urlString];
   
    // 2.创建播放对象
    // 01.创建播放元素
    _playerItem = [[AVPlayerItem alloc] initWithURL:url];
    _player = [[AVPlayer alloc] initWithPlayerItem:_playerItem];
   
    // 播放
    [_player play];
   
    // 暂停
//    [_player pause];
   
    */
   
   
    // 3.注册系统声音 (测试一些系统功能的时候，模拟器可能不好使)
    // 1.获取路径
    NSString *urlString = [[NSBundle mainBundle] pathForResource:@"44th Street Medium" ofType:@"caf"];
    NSURL *fileUrl = [NSURL fileURLWithPath:urlString];
   
    // 2.创建创建系统生意的标识
    SystemSoundID soundID ;
    // 3.注册系统声音
    AudioServicesCreateSystemSoundID((__bridge CFURLRef)fileUrl, &soundID)
    ;
   
    // 4.播放
    AudioServicesPlaySystemSound(soundID);
   
    // 设置震动
    AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
   
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    // 获取音乐的总时长
    NSLog(@"%lld",_playerItem.duration.value/_playerItem.duration.timescale);

}

 

／／／／／／／／／／／音频（代理方式）／／／／／／／／／／／／

 

button（play、stop、pause暂停）略写

//从budle路径下读取音频文件　　轻音乐 - 萨克斯回家这个文件名是你的歌曲名字,mp3是你的音频格式

         NSString *string = [[NSBundle mainBundle] pathForResource:@"王绎龙-邻家美眉" ofType:@"mp3"];
         //把音频文件转换成url格式
         NSURL *url = [NSURL fileURLWithPath:string];
         //初始化音频类 并且添加播放文件
         avAudioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
         //设置代理
         avAudioPlayer.delegate = self;
   
         //设置初始音量大小
        // avAudioPlayer.volume = 1;
   
         //设置音乐播放次数  -1为一直循环
         avAudioPlayer.numberOfLoops = 0;
   
     //预播放
         [avAudioPlayer prepareToPlay];
   
         //初始化一个播放进度条
         progressV = [[UIProgressView alloc] initWithFrame:CGRectMake(20, 50, 200, 20)];
         [self.view addSubview:progressV];
   
   
         //用NSTimer来监控音频播放进度
         timer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self
            selector:@selector(playProgress)
userInfo:nil repeats:YES];
         //初始化音量控制
         volumeSlider = [[UISlider alloc] initWithFrame:CGRectMake(20, 70, 200, 20)];
         [volumeSlider addTarget:self action:@selector(volumeChange)
            forControlEvents:UIControlEventValueChanged];
         //设置最小音量
         volumeSlider.minimumValue = 0.0f;
         //设置最大音量
         volumeSlider.maximumValue = 10.0f;
         //初始化音量为多少
         volumeSlider.value = 5.0f;
   
         [self.view addSubview:volumeSlider];
   
   
         //声音开关控件(静音)
         UISwitch *swith = [[UISwitch alloc] initWithFrame:CGRectMake(100, 20, 60, 40)];
         [swith addTarget:self action:@selector(onOrOff:) forControlEvents:UIControlEventValueChanged];
         //默认状态为打开
         swith.on = YES;
         [self.view addSubview:swith];
}
- (void)play
{
    [avAudioPlayer play];
}
- (void)pause
{
    [avAudioPlayer pause];
}
- (void)stop
{
    avAudioPlayer.currentTime = 0;
    [avAudioPlayer stop];
}
- (void)playProgress
{
    progressV.progress = avAudioPlayer.currentTime/avAudioPlayer.duration;
}
- (void)onOrOff:(UISwitch *)sender
{
    avAudioPlayer.volume = sender.on;
}
- (void)volumeChange
{
     avAudioPlayer.volume = volumeSlider.value;
}
//播放完成时调用的方法  (代理里的方法),需要设置代理才可以调用
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag
{
         [timer invalidate]; //NSTimer暂停  invalidate  使...无效;
    NSLog(@"播放结束才会调用");

}

 

二、视频

MPMoviePlayerControlle想要实现视频播放也得导入库文件MediaPlayer.framework

//导入头文件

#import <MediaPlayer/MediaPlayer.h>

    // 1.自定义播放视图的大小

    MPMoviePlayerController *_mpPlayerController;

//  

    // 1.自定义播放界面

NSURL *url = [NSURL URLWithString:@"http://vf1.mtime.cn/Video/2012/04/23/mp4/120423212602431929.mp4"];

//创建播放对象

    _mpPlayerController = [[MPMoviePlayerController alloc] initWithContentURL:url];

    // 设置播放视图的大小

_mpPlayerController.view.frame = CGRectMake(20, 20, 320, 140);

//添加的时候要注意_mpPlayerController.view

    [self.view addSubview:_mpPlayerController.view];

    }

    // 播放

    [_mpPlayerController play];

代码：

//    弹出播放
    Broadcast = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    Broadcast.frame = CGRectMake(150, 170, 100, 100);
    Broadcast.tintColor = [UIColor redColor];
    [Broadcast setTitle:@"播放" forState:UIControlStateNormal];
    [Broadcast addTarget:self action:@selector(begingAction:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:Broadcast];
//    暂停
    Broadcast1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    Broadcast1.frame = CGRectMake(150, 260, 100, 100);
    Broadcast1.tintColor = [UIColor redColor];
    [Broadcast1 setTitle:@"暂停" forState:UIControlStateNormal];
    [Broadcast1 addTarget:self action:@selector(begingAction1:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:Broadcast1];
//    停止
    Broadcast2 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    Broadcast2.frame = CGRectMake(150, 360, 100, 100);
    Broadcast2.tintColor = [UIColor redColor];
    [Broadcast2 setTitle:@"停止" forState:UIControlStateNormal];
    [Broadcast2 addTarget:self action:@selector(begingAction2:) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:Broadcast2];

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(exitFullScreen:) name: MPMoviePlayerDidExitFullscreenNotification object:nil];

}
-(void)begingAction:(UIButton *)beging
{
    if (_mpPlayerController == nil){
    // 1.自定义播放界面
    NSURL *url = [NSURL URLWithString:@"http://vf1.mtime.cn/Video/2012/04/23/mp4/120423212602431929.mp4"];
    _mpPlayerController = [[MPMoviePlayerController alloc] initWithContentURL:url];
    // 设置播放视图的大小
    _mpPlayerController.view.frame = CGRectMake(20, 20, 320, 140);
    [self.view addSubview:_mpPlayerController.view];
    }
    // 播放
    [_mpPlayerController play];
}
-(void)begingAction1:(UIButton *)beging1
{
    [_mpPlayerController pause];
}
-(void)begingAction2:(UIButton *)beging2
{
    [_mpPlayerController stop];
    _mpPlayerController = nil;

}

-(void)exitFullScreen:(NSNotification *)notification{
    [mpc.view removeFromSuperview];
    NSLog(@"remove player");

}

@end