【swift系列之UIButton】简单使用

override func viewDidLoad() {        super.viewDidLoad()        let button = UIButton.buttonWithType(UIButtonType.System) as! UIButton        button.frame = CGRectMake(100, 100, 80, 50)        button.backgroundColor = UIColor.orangeColor()        button.setTitle("选照片", forState: UIControlState.Normal)        button.addTarget(self, action: "clickBtn:", forControlEvents: UIControlEvents.TouchUpInside)        self.view.addSubview(button)    }    func clickBtn(sender:UIButton){        self.fromAlbum()    }