LoginView.Swift

import UIKit

protocolLoginViewDelegate:class {

   //执行登录所做的回调

    funcloginHandle(account:String) ->Void

}

class LoginView: UIView,UITextFieldDelegate {

    privatevarbackImageView:UIImageView?

    privatevaraccountTF:UITextField?

    privatevarloginBtn:UIButton?

    //定义代理属性

    weak var delegate:LoginViewDelegate?

    overrideinit(frame:CGRect) {

        super.init(frame: frame)

        //背景视图

        self.backImageView=UIImageView(frame:CGRect(x:0, y:0, width:scrWidth, height:scrHeight))

        self.backgroundColor = UIColor.white

        self.accountTF=UITextField(frame:CGRect(x:20, y:150, width:scrWidth-40, height:60))

        self.accountTF?.placeholder="请输入账号"

        self.accountTF?.delegate=self

        self.accountTF?.textAlignment= .center

        self.accountTF?.borderStyle= .line

        self.addSubview(self.accountTF!)

        //

        self.loginBtn=UIButton(frame:CGRect(x:45, y:230, width:scrWidth-90, height:60))

        self.loginBtn?.setTitle("登录", for: .normal)

        self.loginBtn?.backgroundColor = UIColor.gray

        self.loginBtn?.addTarget(self, action:#selector(loginBtnDidPress(sender:)), for: .touchUpInside)

        self.addSubview(self.loginBtn!)

    }

    @objcfuncloginBtnDidPress(sender:UIButton) ->Void{

        ifletacc =self.accountTF?.text{

            if!acc.isEmpty{

            self.delegate?.loginHandle(account: acc)

            }

            else{

                print("数据不可为空")

            }

        }

        else{

            print("数据不可为空")

        }

    }

    requiredinit?(coder aDecoder:NSCoder) {

        fatalError("init(coder:) has not been implemented")

    }

    functextFieldShouldReturn(_textField:UITextField) ->Bool{

        textField.resignFirstResponder()

        return true

    }

    overridefunctouchesBegan(_touches:Set, with event:UIEvent?) {

        self.endEditing(true)

    }