Objective C：检测摇晃动作

Question

我这样使用shake API：

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

如何检测晃动已停止？

- Chris

Answer 1

你已经走在了正确的轨道上，然而，仍需添加更多内容来检测摇晃：

你可以通过向 motionBegan 或 motionEnded 方法添加一个 NSLog，然后在模拟器中按下 CONTROL + COMMAND + Z 进行测试。

#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
    }
}

- WrightsCS

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canBecomeFirstResponder 有意义。 - Almas Adilbek