Custom UISlider

Question

How to customize UISlider?(change style,background,...)

Answer 1

Read the documentation: UISlider Class Reference

Have a close look at the following methods:

Changing the Slider’s Appearance

setMinimumTrackImage:forState:
setMaximumTrackImage:forState:
setThumbImage:forState:

For background have a look at UIView documentation.

Answer 2

IF you want some example code I could recommend you to look at Apple's example code project UICatalog. This project gives you some basic knowledge about many of the UI elements. In the example they have a custom slider with different colors to the default UISlider.