UISlider的应用-----通过简单的图片设置改变滑动效果

//设置结点普通效果图片
UIImage *thumbImageNormal = [UIImage imageNamed:@"SliderThumb-Normal"];         //SliderThumb-Normal为图片名字
[self.slider setThumbImage:thumbImageNormal forState:UIControlStateNormal];     //slider为Slider对象名

//设置结点高亮效果图片
UIImage *thumbImageHighlighted =[UIImage imageNamed:@"SliderThumb-Highlighted"];
[self.slider setThumbImage:thumbImageHighlighted forState:UIControlStateHighlighted];

//设置结点左边背景
UIImage *trackLeftImage = [[UIImage imageNamed:@"SliderTrackLeft"]stretchableImageWithLeftCapWidth:14 topCapHeight:0];
[self.slider setMinimumTrackImage:trackLeftImage forState:UIControlStateNormal];

//设置结点右边背景
UIImage *trackRightImage = [[UIImage imageNamed:@"SliderTrackRight"]stretchableImageWithLeftCapWidth:14 topCapHeight:0];
[self.slider setMaximumTrackImage:trackRightImage forState:UIControlStateNormal];