Having the UIControlEventValueChanged fire when UISlider is being animated?

iphone cocoa-touch uislider
RickiG picture RickiG · May 12, 2010 · Viewed 15.3k times · Source

I have set my UISlider up to respond to value changed events:

[customSlider addTarget:self action:@selector(sliderMove:) forControlEvents:UIControlEventValueChanged];
[customSlider addTarget:self action:@selector(sliderStart:) forControlEvents:UIControlEventTouchDown];
[customSlider addTarget:self action:@selector(sliderEnd:) forControlEvents:UIControlEventTouchUpInside];

I would like to animate the slider to the position where the user left it the last time the view was used. I do this with:

[customSlider setValue:position animated:YES];

Everything works fine, except, I have build a "tag" that hangs over the sliders "knob" so the user can see the value when moving the slider. The position of the "tag" is set when the UIControlEventValueChanged calls the "sliderMove" method.

When using the [slider setValue:position animated:YES] the slider moves, but the event does not fire.

Is there a delegate I can get to or an event that covers this scenario?

Thanks for any help given:)

Answer

bddckr picture bddckr · May 12, 2010

Sounds like a bug, try to workaround this by calling

[slider sendActionsForControlEvents:UIControlEventValueChanged];

right after you set the value programmatically.

Related questions

Customize UISlider (track image height)

I'm customizing a UISlider. I could set a custom thumb image that is higher than the usual thumb however I could not make the track higher when setting a higher minimum track image but the track height remained the same. …

Read More
How to get the center of the thumb image of UISlider

I'm creating a custom UISlider to test out some interface ideas. Mostly based around making the thumb image larger. I found out how to do that, like so: UIImage *thumb = [UIImage imageNamed:@"newThumbImage_64px.png"]; [self.slider setThumbImage:thumb forState:…

Read More
UISlider returns two Touch Up Inside events, why does that happen?

I have a slider that I'm using to set a float value somewhere. I connect Value Changed to a method in my viewController. That part works fine. I need to know when the user starts touching the control but not …

Read More