iPhone:如何知道UISlider是否正在滑动？

Question

我正在使用以下代码来了解滑块是否正在滑动.
但有没有一种属性或方法可以更容易地知道？

[slider addTarget:self action:@selector(touchUp) forControlEvents:UIControlEventTouchUpInside];
[slider addTarget:self action:@selector(touchUp) forControlEvents:UIControlEventTouchUpOutside];
[slider addTarget:self action:@selector(touchUp) forControlEvents:UIControlEventTouchCancel];            
[slider addTarget:self action:@selector(touchDown) forControlEvents:UIControlEventTouchDown];

- (void)touchDown {
    self.sliding = YES;
}

-(void)touchUp {
    self.sliding = NO;
}

Answer 1

您可以使用酒店.

slider.highlighted 

当你按住它时,该属性的值为YES.