声明协议
import UIKit
protocol LYMKeyBoardDelegate {
func showButtonTitle(buttonTitle:String)
}
class文件
class LYMKeyBoard: UIView {
//代理
var delegate:LYMKeyBoardDelegate?
//自定义控件
//1.继承uiview创建新的类
//2.确定自定义控件上的子视图
//3.在构造方法中单纯的创建子视图（不去设置feame相关属性）
//4.在layoutSubviews()设置子视图frame
override init(frame: CGRect) {
super.init(frame: frame)
//确定每个按钮上要显示的内容
let contents = ["1","2","3","4","5","6","7","8","9","0","X","返回"]
// 创建显示内容所对应的按钮
for item in contents {
//创建按钮
let button = UIButton()
//设置文字
button.setTitle(item, forState: .Normal)
button.setImage(UIImage.init(named: "cry"), forState: .Normal)
button.addTarget(self, action: #selector(btnAction(_:)), forControlEvents: .TouchUpInside)
button.layer.borderWidth = 2
button.layer.borderColor = UIColor.blackColor().CGColor
self.addSubview(button)
}
}
调用协议
func btnAction(btn:UIButton){
//按钮点击之后想要将按钮的内容显示在textfeild上面，但是当前keyboard做不到。想要viewController来帮他做。->代理模式
//三要素
//委托:LYMKeyBoard
//协议:想要将按钮的内容显示在textfeild上面
//代理:viewController
//按钮点击的时候让按钮显示按钮的title
self.delegate?.showButtonTitle(btn.currentTitle!)
}
//只有在视图中创建或重写了构造方法，那么就必须实现下面的这个方法
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
这个方法只有在视图真正的显示在界面上的时候才会第一次调用
override func layoutSubviews() {
//公共属性：
//间距
let margin:CGFloat = 15
//keyBoard的宽=屏幕的宽
let keyWidth = UIScreen.mainScreen().bounds.size.width
let keyHeight = self.frame.size.height
//按钮的宽度和高度，
let width = (keyWidth - 4*margin)/3
let height = (keyHeight - margin*5)/4
var i = 0
for item in self.subviews{
//保存当前按钮对应的位置
//判段一个对象的类型是否是指定的类型
if item.isKindOfClass(UIButton.self){
//强制转换（将UIView强者转换成UIButton），前提是被转换的对象的实质就是被转换的类型
let button = item as! UIButton
//计算按钮的frame
let x = (margin+width)*CGFloat(i%3) + margin
let y = (margin+height)*CGFloat(i/3) + margin
button.frame = CGRectMake(x, y, width, height)
i += 1
}else{
print("不是按钮")
}
}
}
}
2.调用自定义键盘
import UIKit
class ViewController: UIViewController {
//MARK:生命周期
let textFeild = UITextField()
override func viewDidLoad() {
super.viewDidLoad()
textFeild.frame = CGRectMake(100, 100, 250, 50)
textFeild.backgroundColor = UIColor.yellowColor()
textFeild.background = UIImage.init(named: "cry")
self.view.addSubview(textFeild)
//创建自己的键盘
let keyBoard = LYMKeyBoard.init(frame: CGRectMake(0, 0, 0, 256))
//设置代理
keyBoard.delegate = self
keyBoard.backgroundColor = UIColor.greenColor()
textFeild.inputView = keyBoard
//切原角（所有视图都可以）
//每个视图都有一个layer，专门负责视图的显示
//让layer可以裁剪
textFeild.layer.masksToBounds = true
//设置圆角半径
textFeild.layer.cornerRadius = 30
//加边框
//设置边框的宽度
textFeild.layer.borderWidth = 3
//设置边框的颜色
textFeild.layer.borderColor = UIColor.brownColor().CGColor
}
}
遵守协议方法
extension ViewController:LYMKeyBoardDelegate{
func showButtonTitle(buttonTitle: String) {
//获取到textfeild原来的内容
var textStr = ""
if let str = textFeild.text{
textStr = str
}
//如果按钮点击的是”返回“
if buttonTitle == "返回"{
textFeild.resignFirstResponder()
//键盘收起之后，当前函数直接结束
return
}
if buttonTitle == "X"{
//判断textfeild是否为空？
if textFeild.text?.isEmpty == false {
let index = textFeild.text?.endIndex.predecessor()
textStr.removeAtIndex(index!)
//将删除后的内容在赋值给textfield
textFeild.text = textStr
}
return
}
//如果没有点击返回和删除就将点击的内容拼接到原来的内容上
textFeild.text = textStr+buttonTitle
}
}