IOS播放音频 AVAudioPlayer（实例）_移动开发_编程开发_程序员俱乐部

1. AVFoundation

 

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

 

firstviewcontroller.h

C代码  class="star" src="/Upload/Images/2014101810/40B102E0EF997EA6.png" alt="收藏代码" />spinner" style="display: none;" src="/Upload/Images/2014101810/4E072B8B8C20032D.gif" alt="" />

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

 

 

 

 

 

• MsicPlayer.zip (28.8 KB)