UI控件

 

UIButton常用属性

 

1.1UIButton的创建

a.不带样式的:

let btn: UIButton = UIButton()

b.带样式的:

let btns:UIButton = UIButton(type: UIButtonType)

用法如下:

let  btn: UIButton = UIButton(type: .Custom)

 

1.2UIButton设置字内容和颜色

btn.setTitle("按钮", forState: .Normal)


btn.setTitleColor(UIColor.whiteColor(), forState: .Normal)

 

1.3UIButton设置背景颜色和背景图片

btn.backgroundColor = UIColor.blackColor()

btn.setBackgroundImage(UIImage(named:"1"), forState: .Normal)

 

1.4UIButton设置字体大小

btn.titleLabel?.font = UIFont.systemFontOfSize(20)

 

1.5禁用UIButton 

btn.enabled = false   //禁止按钮,默认为true

 

1.6设置圆角

btn.layer.cornerRadius = 8

 

1.7设置背景图片为圆角(因为我们直接设置UIButton圆角时,图片不会变为圆角)

buttonImage.setImage(UIImage(named:"1") , forState: UIControlState.Normal)
//设置背景图片为圆角
buttonImage.imageView?.layer.cornerRadius = 50

 

1.8在UIButton上添加图片和文字,有时需要我们调整,此时需要:

//方向为逆时针方向,上、左、下、右依次去设置的
btn.imageEdgeInsets = UIEdgeInsetsMake(top: CGFloat, left: CGFloat, bottom: CGFloat, right: CGFloat)
btn.titleEdgeInsets = UIEdgeInsetsMake(top: CGFloat, left: CGFloat, bottom: CGFloat, right: CGFloat)

案例:

//创建一个图片一个文字的按钮     
let btn2: UIButton = UIButton(type: .Custom)        
btn2.frame = CGRectMake(50, 100, 120, 35)        
btn2.setImage(UIImage(named: "1"), forState: .Normal)        
btn2.backgroundColor = UIColor.blackColor()        
btn2.titleLabel?.font = UIFont.systemFontOfSize(20)        
btn2.imageView?.contentMode = UIViewContentMode.ScaleAspectFit        
btn2.setTitle("图片按钮", forState: .Normal)        
//偏移量,分别为上下左右        
btn2.imageEdgeInsets = UIEdgeInsetsMake(0, -50, 0, 0)        
btn2.titleEdgeInsets = UIEdgeInsetsMake(0, -80, 0, 5)        btn2.setTitleColor(UIColor.whiteColor(), forState: .Normal)        btn2.adjustsImageWhenHighlighted = false        
self.view.addSubview(btn2)

如图: 

 

1.9添加按钮的点击事件

//第一种是不带参数的,第二种是带参数的

btn.addTarget(self, action:"click", forControlEvents: .TouchUpInside)

btn.addTarget(self, action:"clicks:", forControlEvents: .TouchUpInside)

//第一种:

    func click(){}

//第二种:

    func clicks(sender:UIButton){}

 

1.10按钮带边框

Btn.layer.borderColor = UIColor.blackColor().CGColor 

案例:

let Btn = UIButton(.Custom)
Btn.frame = CGRect(x:0,y:0,width:50,height:20)
Btn.setTitle("边框按钮", forState: .Normal)        
Btn.setTitleColor(UIColor.blackColor(), forState: .Normal)        
Btn.layer.borderColor = UIColor.blackColor().CGColor        
Btn.layer.borderWidth = 1        
Btn.layer.cornerRadius = 8
Btn.layer.masksToBounds = true        
self.view.addSubview(btn6)   

 如图: