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Swift UIButton UIButtonType，
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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、
@H_
404_11@ //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(20,100,36);
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(20,150,36);
btn3.setTitle("DetailDisclosureButton",forState: UIControlState.Normal);
self.view.addSubview(btn3);
let btn4=UIButton.buttonWithType(UIButtonType.InfoLight) as! UIButton
btn4.frame=CGRectMake(20,200,36);
btn4.setTitle("InfoLightButton",forState: UIControlState.Normal);
self.view.addSubview(btn4);
let btn5=UIButton.buttonWithType(UIButtonType.InfoDark) as! UIButton
btn5.frame=CGRectMake(20,250,36);
btn5.setTitle("InfoDarkButton",forState: UIControlState.Normal);
self.view.addSubview(btn5);
let btn6=UIButton.buttonWithType(UIButtonType.ContactAdd) as! UIButton
btn6.frame=CGRectMake(20,300,36);
btn6.setTitle("ContactAddButton",forState: UIControlState.Normal);
self.view.addSubview(btn6);
需要注意的是 按照以上几种方式创建的button将不能相互转换为其他类型了
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