iOS App中实现播放音效和音乐功能的简单示例

#import <AudioToolbox/AudioToolbox.h>  

- (void)viewDidLoad {  
    [super viewDidLoad];  
    // Do any additional setup after loading the view, typically from a nib.  
      
    UIButton *btn1=[[UIButton alloc] initWithFrame:CGRectMake(20, 100, 120, 36)];  
    [btn1 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];  
    [btn1 setTitle:@"警告" forState:UIControlStateNormal];  
    [btn1 addTarget:self action:@selector(btn1Act) forControlEvents:UIControlEventTouchUpInside];  
    [self.view addSubview:btn1];  
      
    UIButton *btn2=[[UIButton alloc] initWithFrame:CGRectMake(20, 150, 120, 36)];  
    [btn2 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];  
    [btn2 setTitle:@"错误" forState:UIControlStateNormal];  
    [btn2 addTarget:self action:@selector(btn2Act) forControlEvents:UIControlEventTouchUpInside];  
    [self.view addSubview:btn2];  
}  

-(void)btn1Act {  
      
    [self playSoundEffect:@"alarm.caf"];  
}  
-(void)btn2Act {  
      
    [self playSoundEffect:@"ct-error.caf"];  
}  
  
-(void)playSoundEffect:(NSString *)name{  
    NSString *audioFile=[[NSBundle mainBundle] pathForResource:name ofType:nil];  
    NSURL *fileUrl=[NSURL fileURLWithPath:audioFile];  
    //1.获得系统声音ID  
    SystemSoundID soundID=0;  
    /** 
     * inFileUrl:音频文件url 
     * outSystemSoundID:声音id（此函数会将音效文件加入到系统音频服务中并返回一个长整形ID） 
     */  
    AudioServicesCreateSystemSoundID((__bridge CFURLRef)(fileUrl), &soundID);  
    //如果需要在播放完之后执行某些操作，可以调用如下方法注册一个播放完成回调函数  
    AudioServicesAddSystemSoundCompletion(soundID, NULL, NULL, soundCompleteCallback, NULL);  
    //2.播放音频  
    AudioServicesPlaySystemSound(soundID);//播放音效  
    //    AudioServicesPlayAlertSound(soundID);//播放音效并震动  
}  
  
void soundCompleteCallback(SystemSoundID soundID,voidvoid * clientData){  
    NSLog(@"播放完成...");  
}  

#import <AVFoundation/AVFoundation.h> 

@property (nonatomic,strong) AVAudioPlayer *audioPlayer;//播放器  
@property (strong, nonatomic) UIProgressView *playProgress;//播放进度  
@property (strong, nonatomic) UIButton *playOrPause; //播放/暂停按钮(如果tag为0认为是暂停状态，1是播放状态)  
  
@property (strong ,nonatomic) NSTimer *timer;//进度更新定时器  

- (void)viewDidLoad {  
    [super viewDidLoad];  
    // Do any additional setup after loading the view, typically from a nib.  
    self.view.backgroundColor=[UIColor lightGrayColor];  
    [self initUserFace];  
      
}  
  
-(void)initUserFace{  
      
    //添加playProgress  
      
    _playProgress= [[UIProgressView alloc] initWithProgressViewStyle: UIProgressViewStyleDefault];  
      
    _playProgress.frame=CGRectMake(0, 100, self.view.bounds.size.width, 36);  
      
    [self.view addSubview:_playProgress];  
      
    //添加播放按钮  
    _playOrPause=[[UIButton alloc]initWithFrame:CGRectMake(0, 150, 120, 36)];  
    [_playOrPause setTitle:@"播放" forState:UIControlStateNormal];  
    [_playOrPause setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];  
    [_playOrPause addTarget:self action:@selector(playOrPauseAct:) forControlEvents:UIControlEventTouchUpInside];  
    [self.view addSubview:_playOrPause];  
      
}  

-(NSTimer *)timer{  
    if (!_timer) {  
        _timer=[NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(updateProgress) userInfo:nil repeats:true];  
    }  
    return _timer;  
}  
  
-(AVAudioPlayer *)audioPlayer{  
    if (!_audioPlayer) {  
        NSString *urlStr=[[NSBundle mainBundle]pathForResource:@"朋友.mp3" ofType:nil];  
        NSURL *url=[NSURL fileURLWithPath:urlStr];  
        NSError *error=nil;  
        //初始化播放器，注意这里的Url参数只能时文件路径，不支持HTTP Url  
        _audioPlayer=[[AVAudioPlayer alloc]initWithContentsOfURL:url error:&error];  
        //设置播放器属性  
        _audioPlayer.numberOfLoops=0;//设置为0不循环  
        _audioPlayer.delegate=self;  
        [_audioPlayer prepareToPlay];//加载音频文件到缓存  
        if(error){  
            NSLog(@"初始化播放器过程发生错误,错误信息:%@",error.localizedDescription);  
            return nil;  
        }  
    }  
    return _audioPlayer;  
}  
  
  
/** 
 *  播放音频 
 */  
-(void)play{  
    if (![self.audioPlayer isPlaying]) {  
        [self.audioPlayer play];  
        self.timer.fireDate=[NSDate distantPast];//恢复定时器  
    }  
}  
  
/** 
 *  暂停播放 
 */  
-(void)pause{  
    if ([self.audioPlayer isPlaying]) {  
        [self.audioPlayer pause];  
        self.timer.fireDate=[NSDate distantFuture];//暂停定时器，注意不能调用invalidate方法，此方法会取消，之后无法恢复  
          
    }  
}  
  
/** 
 *  更新播放进度 
 */  
-(void)updateProgress{  
    float progress= self.audioPlayer.currentTime /self.audioPlayer.duration;  
    [self.playProgress setProgress:progress animated:true];  
}  
  
#pragma mark - 播放器代理方法  
-(void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag{  
    NSLog(@"音乐播放完成...");  
      
    [_playOrPause setTitle:@"播放" forState:UIControlStateNormal];  
      
}  

-(void)playOrPauseAct:(UIButton *)sender{  
    NSString *strPlay=sender.titleLabel.text;  
    NSLog(@"strPlay=%@",strPlay);  
    if ([strPlay isEqualToString:@"播放"]) {  
        [sender setTitle:@"暂停" forState:UIControlStateNormal];  
        [self play];  
    }else{  
        [sender setTitle:@"播放" forState:UIControlStateNormal];  
        [self pause];  
    }  
}