Align UISlider thumb image

Question

I've customized my UISlider but my thumb image looks strange, I mean it's position not aligned by center:

enter image description here

But should be like this:

enter image description here

And here is code:

UIImage *leftTrack = [[UIImage imageNamed:@"blueTrack.png"] stretchableImageWithLeftCapWidth:3 topCapHeight:0];
UIImage *rightTrack = [[UIImage imageNamed:@"whiteTrack.png"] stretchableImageWithLeftCapWidth:3 topCapHeight:0];
[slider setThumbImage:[UIImage imageNamed:@"thumbButton.png"] forState:UIControlStateNormal];
[slider setMinimumTrackImage:leftTrack forState:UIControlStateNormal];
[slider setMaximumTrackImage:rightTrack forState:UIControlStateNormal];

Your stretch image is not exactly as high as UISlider's internal implementation requires it to be. Try making it less high. — , Feb 24 '12 at 19:47
Unfortunately this not helped. What sizes these 3 images should be? — Timur Mustafaev, Feb 24 '12 at 21:34

score 6 · Accepted Answer · edited Sep 29 '21 at 17:05

6

There are two ways:

First one is to use

- (CGRect)trackRectForBounds:(CGRect)bounds;

and / or

- (CGRect)thumbRectForBounds:(CGRect)bounds trackRect:(CGRect)rect value:(float)value;

methods of UISlider when subclassing to lay out thumb the way you want

Second way is to adjust your artwork:

enter image description here

edited Sep 29 '21 at 17:05

pkamb

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answered Jun 05 '13 at 08:11

Sash Zats

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Align UISlider thumb image

1 Answers1