目標C：檢測抖動

Question

我使用搖API這樣的：

- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event 
{ 
    if (event.subtype == UIEventSubtypeMotionShake) 
    { 
     [img stopAnimating];  
    } 
} 

如何檢測到晃動停止？

Answer 1

你是在正確的軌道上，但是，仍然有你需要添加檢測震動更多的東西：

您可以通過添加NSLog到motionBegan或motionEnded方法進行測試，並在模擬器，按CONTROL + COMMAND + Z

#pragma mark - Shake Functions 

-(BOOL)canBecomeFirstResponder { 
    return YES; 
} 

-(void)viewDidAppear:(BOOL)animated { 
    [super viewDidAppear:NO]; 
    [self becomeFirstResponder]; 
} 

-(void)viewWillDisappear:(BOOL)animated { 
    [super viewWillDisappear:NO]; 
} 

-(void)viewDidDisappear:(BOOL)animated { 
    [self resignFirstResponder]; 
    [super viewDidDisappear:NO]; 
} 

-(void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event 
{ 
    if (motion == UIEventSubtypeMotionShake) 
    { 
     // shaking has began. 
    } 
} 


-(void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event 
{ 
    if (motion == UIEventSubtypeMotionShake) 
    { 
     // shaking has ended 
    } 
}