How to remove the thumb of UISlider in iphone?

iphone, uislider, uiview, xcode

Solution

Simply set the image for the thumb to be nil

UIImage *empty = [UIImage new];
[theSlider setMinimumTrackImage:[UIImage alloc] forState:UIControlStateNormal];
[theSlider setMaximumTrackImage:[UIImage alloc] forState:UIControlStateNormal];

Problem

I have two UISliders in the same view.My requirement is,when user change the value of 1st slider,the 2nd slider value should be change according to it.So,in 2nd slider I want to invisible its thumb.Although I have clear the color of its thumb,It is visible to the user.How can I solve it ?

Original source