iPhone: How to know UISlider is sliding or not?

Question

I'm using the following code to know a slider is now sliding or not.
But is there a property or method to know that more easily?

[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;
}

if you want to know whether the value of the slider changed or not (sliding or not), you can listen to UIControlEventValueChanged -- here's an example I found on SO http://stackoverflow.com/questions/4093143/what-gets-called-when-a-uislider-value-changes — ewiinnnnn, Jun 25 '12 at 10:16
thank you. but I know that event. I'm using slider for volume. And I also use volume changed notification. I want to ignore the notification while I'm sliding volume slider. — js_, Jun 25 '12 at 10:41

score 5 · Answer 1 · answered Mar 09 '13 at 16:40

5

There is a property you can use.

slider.highlighted

This property will have value YES when you are holding it down.

answered Mar 09 '13 at 16:40

Geebs

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RIGHT. `UISlider` is a subclass of UIControl, like UIButton. Very interesting – Tony Jul 14 '14 at 06:55

score 3 · Accepted Answer · answered Jun 25 '12 at 10:02

3

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

Using booleans is indeed the common way to track user interaction on sliders.

But is there a property or method to know that more easily?

No, not as far I'm aware.

answered Jun 25 '12 at 10:02

Anne

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iPhone: How to know UISlider is sliding or not?

2 Answers2