其实很简单,UIButton中有方法的,在代码时设置就行了
UIImage *bgImg1 = [UIImage imageNamed:@"Selected.png"];
UIImage *bgImg2 = [UIImage imageNamed:@"Unselected.png"];
[btn setImage:bgImg2 forState:UIControlStateNormal];//正常状态
[btn setImage:bgImg1 forState:UIControlStateHighlighted];//点击高亮状态