let btn = CHWButton(count: 5, frame: CGRectMake(50, 100, 100, 50), color:nil) btn.animaType = CountBtnType.CHWBtnTypeScale btn.layer.masksToBounds = true btn.layer.cornerRadius = 5 self.view.addSubview(btn)原文：http://www.cnblogs.com/wukun16/p/4850732.html