【iPhone开发常用代码积累】单例模式计时器NSTimer播放音频

单例模式

//单例模式 + (AVCommon *)sharedAVCommon { static AVCommon *sharedAVCommon; @synchronized(sharedAVCommon) { if (sharedAVCommon == nil) { sharedAVCommon=[[AVCommon alloc]init]; } } return sharedAVCommon; }

 

 

 

计时器NSTimer

//.h头文件 NSTimer *timer; //... ... @property (nonatomic, retain) NSTimer *timer; //.m文件 //创建新的计时器实例 - (void)openNewTimer { //这个类方法返回一个计时器实例，@selector中的方法每隔一秒执行一次（时间由第一个参数设定） timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(showTime) userInfo:nil repeats:YES]; }

 

 

 

播放音频

//播放音频 - (void)playAudio:(id)sender { NSArray *cache = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES); NSString *cachePath = [cache objectAtIndex:0] ; NSString *voiceName = [cachePath stringByAppendingPathComponent:[sender stringByAppendingString:@".wav"]]; NSLog(@"%@",voiceName); NSURL *soundFileURL = [NSURL fileURLWithPath:voiceName]; AVAudioPlayer *newPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:soundFileURL error:nil]; self.player = newPlayer; [newPlayer release]; [self.player prepareToPlay]; self.player.delegate = self; [self.player play]; }