iOSApp中实现播放音效和音乐功能的简单示例

#import  

- (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

@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]; 
    } 
}