第一次摇动的时候有相应，会执行到代码A;但是再摇就不管用了，请问为什么？

Question

-(void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event{    if(motion==UIEventSubtypeMotionShake)     {         代码A     } } -(BOOL)canBecomeFirstResponder{    return YES; } -(void)viewDidAppear:(BOOL)animated {     [super viewDidAppear:animated];     [self becomeFirstResponder]; } -(void)viewWillDisappear:(BOOL)animated {     [self resignFirstResponder];     [super viewWillDisappear:animated]; }

Answer 1

如果你要响应多次，建议使用UIAccelerometer

- (void) accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration {
    if (fabsf(acceleration.x) > 1.0 || fabsf(acceleration.y) > 1.0 || fabsf(acceleration.z) > 1.0) {
        代码A
    }
}