封装一个随机色方法
extension UIColor {
//返回随机颜色
class var randomColor: UIColor {
get {
let red = CGFloat(arc4random()%256)/255.0
let green = CGFloat(arc4random()%256)/255.0
let blue = CGFloat(arc4random()%256)/255.0
return UIColor(red: red, green: green, blue: blue, alpha: 1.0)
}
}
}
调用
???.backgroundColor = UIColor.randomColor