音效的播放__02

- (void)touchesBegan:(NSSet*)touches withEvent:(UIEvent *)event{

NSURL *url = [[NSBundle mainBundle]URLForResource:@"buyao.caf" withExtension:nil];

SystemSoundID soundID;

//创建soundID soundI'D是Int类型

AudioServicesCreateSystemSoundID(CFBridgingRetain(url), &soundID);

//这个是主要的播放的方法

AudioServicesPlaySystemSound(soundID);

}

以上代码,每次都会创建soundID,这样消耗资源,优化:

      - 将ID定义成熟性进行懒加载

if (!_soundID) {

NSURL *url = [[NSBundle mainBundle]URLForResource:@"buyao.caf" withExtension:nil];

SystemSoundID soundID;

//创建soundID soundI'D是Int类型

AudioServicesCreateSystemSoundID(CFBridgingRetain(url), & soundID);

}

- 这样就会保证只有一个