UISlider 自定义图片不到边的解决方法

继承UISlider重写这个方法

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

    rect.origin.x=rect.origin.x-5;

    rect.size.width=rect.size.width+10;

    return CGRectInset([super thumbRectForBounds:bounds trackRect:rect value:value],5,5);

}