Swift UIButton UIButtonType

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#Swift #UIButton #UIButtonType

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本文介绍了Swift中UIButton的UIButtonType枚举，用于定义button的不同类型，并通过实例展示了各种类型的按钮效果。同时，文章指出一旦创建了特定类型的button，就无法转换为其他类型。此外，还提供了苹果开发交流群的信息供读者加入讨论。

UIButton 有一个枚举

UIButtonType

专门用来指定button的类型

这里我们尝试一下接种类型看看效果、

        //按钮的几种类型
        
        //系统默认button
        let btn1=UIButton.buttonWithType(UIButtonType.System) as! UIButton
        btn1.frame=CGRectMake(20, 50, 320, 36);
        btn1.setTitle("SystemButton", forState: UIControlState.Normal);
        self.view.addSubview(btn1);
        
        //所有属性需要自定义，否则字体颜色为白色
        let btn2=UIButton.buttonWithType(UIButtonType.Custom) as! UIButton
        btn2.frame=CGRectMake(20, 100, 320, 36);
        btn2.setTitle("CustomButton", forState: UIControlState.Normal);
        btn2 .setTitleColor(UIColor.blackColor(), forState: UIControlState.Normal)
        self.view.addSubview(btn2);
        
        //以下为几种带图标的button
        let btn3=UIButton.buttonWithType(UIButtonType.DetailDisclosure) as! UIButton
        btn3.frame=CGRectMake(20, 150, 320, 36);
        btn3.setTitle("DetailDisclosureButton", forState: UIControlState.Normal);
        self.view.addSubview(btn3);
        
        let btn4=UIButton.buttonWithType(UIButtonType.InfoLight) as! UIButton
        btn4.frame=CGRectMake(20, 200, 320, 36);
        btn4.setTitle("InfoLightButton", forState: UIControlState.Normal);
        self.view.addSubview(btn4);
        
        let btn5=UIButton.buttonWithType(UIButtonType.InfoDark) as! UIButton
        btn5.frame=CGRectMake(20, 250, 320, 36);
        btn5.setTitle("InfoDarkButton", forState: UIControlState.Normal);
        self.view.addSubview(btn5);
        
        let btn6=UIButton.buttonWithType(UIButtonType.ContactAdd) as! UIButton
        btn6.frame=CGRectMake(20, 300, 320, 36);
        btn6.setTitle("ContactAddButton", forState: UIControlState.Normal);
        self.view.addSubview(btn6);