初试Swift---UIButton

classViewController:UIViewController{

overridefuncviewDidLoad() {

super.viewDidLoad()

//button初始化

letaddButton=UIButton.init(type: .contactAdd)

addButton.frame=CGRect(x:10,y:150,width:100,height:30)

addButton.addTarget(self, action:#selector(tapped), for: .touchUpInside)

self.view.addSubview(addButton)

letcustomButton =UIButton(frame:CGRect(x:10,y:190,width:100,height:30))

customButton.setTitle("好长的字咋办呢你说咋办", for: .normal)

customButton.setTitleColor(UIColor.red, for: .normal)

customButton.titleLabel?.font=UIFont.systemFont(ofSize:12)

customButton.backgroundColor=UIColor.blue

customButton.addTarget(self, action:#selector(touchEd(_:)), for: .touchUpInside)

/*

byTruncatingTail:省略头部文字，省略部分用...代替

byTruncatingMiddle：省略中间部分文字，省略部分用...代替（默认）

byTruncatingTail：省略尾部文字，省略部分用...代替

byClipping：直接将多余的部分截断

byWordWrapping：自动换行（按词拆分）

byCharWrapping：自动换行（按字符拆分）

*/

customButton.titleLabel?.lineBreakMode= .byTruncatingTail

self.view.addSubview(customButton)

// Do any additional setup after loading the view, typically from a nib.

}

functapped(){

print("tapped")

}

functouchEd(_button:UIButton){

print(button.title(for: .normal) ??"111")

}

overridefuncdidReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}