更改iPhone UISlider条形图 [英] Change iPhone UISlider bar image

问题描述

我在我的应用中使用了 UISlider ，但我想使用自定义的外观。我已经将拇指改为我自己的形象，但有没有办法改变吧？我有一个我想要使用的条形图像，但看不到如何做到这一点。

I'm using a UISlider in my app but I'd like to use a custom "look-and-feel" for it. I have changed the thumb to my own image but is there a way to change the bar also? I have a bar image I would like to use but can't see how to do this.

我找到了如何更改最大和最小图像而不是条形图本身。

I have found how to change the max and min image but not the bar itself.

推荐答案

你是正确的使用 -setMinimumTrackImage：forState：和 -setMaximumTrackImage：forState：方法。你错过的是你应该向他们提供可伸缩的 UIImage ，剩下的就是自动处理：

You were right to use -setMinimumTrackImage:forState: and -setMaximumTrackImage:forState: methods. What you missed is that you should provide stretchable UIImage to them, the rest is taken care of automagically:

UIImage *sliderLeftTrackImage = [[UIImage imageNamed: @"SliderMin.png"] stretchableImageWithLeftCapWidth: 9 topCapHeight: 0];
UIImage *sliderRightTrackImage = [[UIImage imageNamed: @"SliderMax.png"] stretchableImageWithLeftCapWidth: 9 topCapHeight: 0];
[mySlider setMinimumTrackImage: sliderLeftTrackImage forState: UIControlStateNormal];
[mySlider setMaximumTrackImage: sliderRightTrackImage forState: UIControlStateNormal];

您可以对最小和最大部分使用相同的图像。

You can use the same image for both the min and max parts.

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