第一步：引进#import <AudioToolbox/AudioToolbox.h>

第二步：获取路径

    NSString *path=[[NSBundle mainBundle]pathForResource:@"duanxin7.caf" ofType:nil];

    NSURL *url=[NSURL fileURLWithPath:path];

    SystemSoundID soundID=1;

第三部： 创建获取id

    AudioServicesCreateSystemSoundID((__bridge CFURLRef)(url), &soundID);

第四部：播放

    AudioServicesPlaySystemSound(soundID);