iphone – xcode ios 6摇动动作从前一个视图调用IBaction

- (void) motionBegan:(UIEventSubtypE)motion withEvent:(UIEvent *)event{
    if (motion == UIEventSubtypeMotionShakE){       
        [self startGame:nil];
    }   
}

在另一个viewController(VPgameViewController)中,我有一个不同的MotionShake事件：

- (void)motionEnded:(UIEventSubtypE)motion withEvent:(UIEvent *)event{
    if(event.subtype == UIEventSubtypeMotionShakE){
        if(count < 3 ){

            [self changeText:nil];
            AudioservicesPlaySystemSound(1016);
            count++;

         }else{

            count = 0;
            AudioservicesPlaySystemSound(1024);
            UIStoryboard *storyboard = self.storyboard;
            VPpoepViewController *shit = [storyboard instantiateViewControllerWithIdentifier:@"PoepViewController"];
           shit.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
           [self presentViewController:shit animated:YES completion:nil];
        }
    }
}

当我在VPgameView中并摇晃Iphone时,它还调用了startGame函数,该函数位于不同的viewController震动事件中.

我怎么能阻止这个？