IOS播放音频AVAudioPlayer（实例）

1. AVFoundation

Build Phases => Link Binary With Libraies => + => AVFoundation.framework => add

firstviewcontroller.h

C代码  

1. #import <UIKit/UIKit.h>  
2. #import <AVFoundation/AVFoundation.h>  
3.   
4. @interface FirstViewController : UIViewController  
5. {    
6.     __weak IBOutlet UILabel *label;  
7.     AVAudioPlayer *player;  
8. }  
9.   
10. - (IBAction)toplay:(id)sender;  
11.   
12. @end  

#import <UIKit/UIKit.h>#import <AVFoundation/AVFoundation.h>@interface FirstViewController : UIViewController{      __weak IBOutlet UILabel *label;    AVAudioPlayer *player;}- (IBAction)toplay:(id)sender;@end

firstviewcontroller.m

C代码  

1. - (IBAction)toplay:(id)sender   
2. {  
3.     NSURL  *url = [NSURL fileURLWithPath:[NSString  stringWithFormat:@"%@/test.mp3",  [[NSBundle mainBundle]  resourcePath]]];  
4.       
5.     NSError  *error;  
6.     player  = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];  
7.          
8.     player.numberOfLoops = -1;  
9.     [player play];  
10.       
11.     [label setText:@"Play ..."];  
12. }  

- (IBAction)toplay:(id)sender {    NSURL  *url = [NSURL fileURLWithPath:[NSString  stringWithFormat:@"%@/test.mp3",  [[NSBundle mainBundle]  resourcePath]]];        NSError  *error;    player  = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];           player.numberOfLoops = -1;    [player play];        [label setText:@"Play ..."];}

或者：

C代码  

1. NSString *path = [[NSBundle mainBundle] pathForResource:@"sound" ofType:@"mp3"];   
2. NSError  *error;   
3. player = [[AVAudioPlayer alloc]initWithContentsOfURL:[[NSURL alloc]initFileURLWithPath:path]error:&error];   
4. [player PRepareToPlay];  
5. player.numberOfLoops = -1;  
6. [player play];  

NSString *path = [[NSBundle mainBundle] pathForResource:@"sound" ofType:@"mp3"]; NSError  *error; player = [[AVAudioPlayer alloc]initWithContentsOfURL:[[NSURL alloc]initFileURLWithPath:path]error:&error]; [player prepareToPlay];player.numberOfLoops = -1;[player play];

test.mp3 拖放到 Supporting Files 文件夹。

播放，暂停和停止

C代码  

1. [player play];  //播放  
2. [player pause]; //暂停  
3. [player stop];  //停止  

[player play];  //播放[player pause]; //暂停[player stop];  //停止

更多功能：

1. 音量：

java代码  

1. player.volume=0.8;//0.0~1.0之间    

player.volume=0.8;//0.0~1.0之间  

2. 循环次数

C代码  

1. player.numberOfLoops = 3;//默认只播放一次 负数（-1）为无限循环  

player.numberOfLoops = 3;//默认只播放一次 负数（-1）为无限循环

3.播放位置

C代码  

1. player.currentTime = 15.0;//可以指定从任意位置开始播放   

player.currentTime = 15.0;//可以指定从任意位置开始播放 

3.1 显示当前时间

C代码  

1. NSLog(@"%f seconds played so  far", player.currentTime);  

NSLog(@"%f seconds played so  far", player.currentTime);

4.声道数

C代码  

1. NSUInteger channels = player.numberOfChannels;//只读属性   

NSUInteger channels = player.numberOfChannels;//只读属性 

5.持续时间

C代码  

1. NSTimeInterval duration = player.dueration;//获取采样的持续时间    

NSTimeInterval duration = player.dueration;//获取采样的持续时间  

6.仪表计数

C代码  

1. player.meteringEnabled = YES;//开启仪表计数功能  
2. [ player updateMeters];//更新仪表读数  
3. //读取每个声道的平均电平和峰值电平，代表每个声道的分贝数,范围在-100～0之间。  
4. for(int i = 0; i<player.numberOfChannels;i++){  
5. float power = [player averagePowerForChannel:i];  
6. float peak = [player peakPowerForChannel:i];  
7. }  

player.meteringEnabled = YES;//开启仪表计数功能[ player updateMeters];//更新仪表读数//读取每个声道的平均电平和峰值电平，代表每个声道的分贝数,范围在-100～0之间。for(int i = 0; i<player.numberOfChannels;i++){float power = [player averagePowerForChannel:i];float peak = [player peakPowerForChannel:i];}

7. 初始化播放器  

C代码  

1. [player prepareToPlay];  

[player prepareToPlay];

8. 判断是否正在播放

C代码  

1. [player isPlaying]  

[player isPlaying]

9、代理方法

          加入播放出现异常，或者被更高级别的系统任务打断，我们的程序还没来得及收场就挂了，怎么办?不急，我们可以通过几个委托方法很好地处理所有的情形。

首先给player设置委托是必须的：

C代码  

1. player.delegate = self;    

player.delegate = self;  

C代码  

1. - (void)audioPlayerDidFinishPlaying:(AVAudioPlayer*)player successfully:(BOOL)flag{  
2.     //播放结束时执行的动作  
3. }  
4. - (void)audioPlayerDecodeErrorDidOccur:(AVAudioPlayer*)player error:(NSError *)error{  
5.     //解码错误执行的动作  
6. }  
7. - (void)audioPlayerBeginInteruption:(AVAudioPlayer*)player{  
8.     //处理中断的代码  
9. }  
10. - (void)audioPlayerEndInteruption:(AVAudioPlayer*)player{  
11.     //处理中断结束的代码  
12. }  

- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer*)player successfully:(BOOL)flag{    //播放结束时执行的动作}- (void)audioPlayerDecodeErrorDidOccur:(AVAudioPlayer*)player error:(NSError *)error{    //解码错误执行的动作}- (void)audioPlayerBeginInteruption:(AVAudioPlayer*)player{    //处理中断的代码}- (void)audioPlayerEndInteruption:(AVAudioPlayer*)player{    //处理中断结束的代码}

参考：

http://blog.csdn.net/xys289187120/article/details/6595919

http://blog.csdn.net/iukey/article/details/7295962

视频：

http://www.youtube.com/watch?v=kCpw6ip90cY

2. AudioToolbox

Build Phases => Link Binary With Libraies => + => AudioToolbox.framework => add

firstviewcontroller.h

C代码  

1. #import <UIKit/UIKit.h>  
2. #import <AudioToolbox/AudioToolbox.h>  
3.   
4. @interface FirstViewController : UIViewController  
5. {    
6. }  
7.   
8. - (IBAction)toplay:(id)sender;  
9.   
10. @end  

#import <UIKit/UIKit.h>#import <AudioToolbox/AudioToolbox.h>@interface FirstViewController : UIViewController{  }- (IBAction)toplay:(id)sender;@end

firstviewcontroller.m

C代码  

1. - (IBAction)toplay:(id)sender  
2. {  
3.     CFBundleRef mainBundle = CFBundleGetMainBundle();  
4.     CFURLRef soundFileURLRef;  
5.     soundFileURLRef = CFBundleCopyResourceURL(mainBundle, (CFStringRef) @"sound1", CFSTR ("wav"), NULL);  
6.       
7.     UInt32 soundID;  
8.     AudioServicesCreateSystemSoundID(soundFileURLRef, &soundID);  
9.     AudioServicesPlaySystemSound(soundID);  
10. }  

- (IBAction)toplay:(id)sender{    CFBundleRef mainBundle = CFBundleGetMainBundle();    CFURLRef soundFileURLRef;    soundFileURLRef = CFBundleCopyResourceURL(mainBundle, (CFStringRef) @"sound1", CFSTR ("wav"), NULL);        UInt32 soundID;    AudioServicesCreateSystemSoundID(soundFileURLRef, &soundID);    AudioServicesPlaySystemSound(soundID);}

视频：

http://www.youtube.com/watch?v=lSJhYx28Krg&feature=youtu.be