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。

[align=left]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）。[/align]

[align=left]//1.音乐文件的路径[/align]
[align=left]NSString *urlString = [[NSBundle mainBundle] pathForResource:@"王绎龙-邻家美眉" ofType:@"mp3"];[/align]
[align=left]//2.转化成本地路径[/align]
[align=left]NSURL *url = [NSURL fileURLWithPath:urlString];[/align]
[align=left]//3.创建播放对象[/align]
[align=left]_audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];[/align]
[align=left]//5.记录音乐的总时长 duration声音的持续时间[/align]
[align=left]@property(readonly) NSTimeInterval duration;[/align]
[align=left]//6.设置音量的大小[/align]
[align=left]@property float volume[/align]
[align=left]设置播放次数[/align]
[align=left] @property float numberOfLoops = 0;[/align]
[align=left] [/align]
[align=left]//播放 暂停 停止[/align]

[align=left](BOOL)play;[/align]

[align=left](void)pause;[/align]

[align=left](void)stop;[/align]

[align=left]//播放进度的改变[/align]

[align=left]@property NSTimeInterval currentTime;[/align]
[align=left] [/align]
[align=left]代码：[/align]
// 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
[align=left]//导入头文件[/align]
[align=left]#import <MediaPlayer/MediaPlayer.h>[/align]
[align=left] // 1.自定义播放视图的大小[/align]
[align=left] MPMoviePlayerController *_mpPlayerController;[/align]
[align=left]// [/align]
[align=left] // 1.自定义播放界面[/align]
[align=left]NSURL *url = [NSURL URLWithString:@"http://vf1.mtime.cn/Video/2012/04/23/mp4/120423212602431929.mp4"];[/align]
[align=left]//创建播放对象[/align]
[align=left] _mpPlayerController = [[MPMoviePlayerController alloc] initWithContentURL:url];[/align]
[align=left] // 设置播放视图的大小[/align]
[align=left]_mpPlayerController.view.frame = CGRectMake(20, 20, 320, 140);[/align]
[align=left]//添加的时候要注意_mpPlayerController.view[/align]
[align=left] [self.view addSubview:_mpPlayerController.view];[/align]
[align=left] }[/align]
[align=left] // 播放[/align]

[align=left] [_mpPlayerController play];[/align]
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