ios-UIbutton

//创建一个button

let button：UIbutton = UIbutton（type：UIbutoonType.Custom）

//添加到视图上

self.view.addsubview(button)

//添加事件

button.addTarget(self,action:Selector("click:"),forControlevents:UIControlEvents.TouchupInside)

//设置按钮的背景图片

button.setBackgroundImage(named:"1.jpg"),forstate:UIcontrolState.normal)

//设置按钮图片

button.setImage(UIimage(named:"1.jpg"),forstate:UIcontrolstate.Normal)

//设置button内容区域偏移量

button.contentEdgeinsets = UIEdgeInsetsMake(-10,-10,0,0)

//开启按钮的点击视觉效果

button.showsTouchWhenHighlighted = true

//设置高亮状态的按钮标题

button.setTitle("新标题"，forState:UIcontrolState.Highlighted)

 

func click(btn:UIbutton)

{

print("按钮被点击了")

btn.backgroundColor = UIcolor(red:(Cgfloat)random()%255)/255 ,

　　green:(CGfloat)(random()%255)/255,blue: (CGfloat)(random(%255)/255,alpha:1)

}