1.截图

请添加图片描述

2.代码

2.1 XYswitchView.swift

import UIKit

protocol XYswitchViewDelegate : AnyObject{
    var isPhoneBtnSelected:Bool {get set}
}

class XYswitchView: UIView {
    
    private weak var delegate:XYswitchViewDelegate?
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupUI()
    }
    
    convenience init(delegate:XYswitchViewDelegate){
        self.init(frame: CGRect.zero)
        self.delegate = delegate
        isPhoneBtnSelected = true
    }
    
    var isPhoneBtnSelected: Bool{
        set{
            delegate?.isPhoneBtnSelected = newValue
            if newValue {
                phoneBtn.isSelected = true
                emailBtn.isSelected = false
                phoneBtnLine.isHidden = false
                emailBtnLine.isHidden = true
            }else{
                phoneBtn.isSelected = false
                emailBtn.isSelected = true
                phoneBtnLine.isHidden = true
                emailBtnLine.isHidden = false
            }
        }
        get{
            return phoneBtn.isSelected
        }
    }

    lazy var phoneBtn:UIButton = {
        let btn = UIButton(type: .custom)
        btn.addTarget(self, action: #selector(phoneBtnClick), for: .touchUpInside)
        btn.setTitle(LocalizableManager.localValue("phone"), for: .normal)
        btn.setAttributedTitle(phoneBtnNormal, for: .normal)
        btn.setAttributedTitle(phoneBtnSelected, for: .selected)
        return btn
    }()
    
    @objc func phoneBtnClick(){
        isPhoneBtnSelected = true
    }
    
    lazy var phoneBtnLine:UIView = {
       let view = UIView()
       view.backgroundColor = UIColor.hexColor(hexValue: 0x0D0E0F)
        view.layer.cornerRadius = 1.25
        view.layer.masksToBounds = true
       return view
    }()
    
   
    lazy var emailBtn:UIButton = {
        let btn = UIButton(type: .custom)
        btn.addTarget(self, action: #selector(emailBtnClick), for: .touchUpInside)
        btn.setTitle(LocalizableManager.localValue("email"), for: .normal)
        btn.setAttributedTitle(emailBtnNormal, for: .normal)
        btn.setAttributedTitle(emailBtnSelected, for: .selected)
        return btn
    }()
    
    lazy var emailBtnLine:UIView = {
       let view = UIView()
       view.backgroundColor = UIColor.hexColor(hexValue: 0x0D0E0F)
        view.layer.cornerRadius = 1.25
        view.layer.masksToBounds = true
       return view
    }()
    
  
    @objc func emailBtnClick(){
        isPhoneBtnSelected = false
    }
    
    
    
 
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

   
}

extension XYswitchView {
    
    func setupUI(){
        addSubview(emailBtn)
        emailBtn.snp.makeConstraints { (make) in
            make.centerY.equalToSuperview()
            make.centerX.equalToSuperview().multipliedBy(1.25)
        }
        
        addSubview(emailBtnLine)
        emailBtnLine.snp.makeConstraints { (make) in
            make.width.equalTo(20)
            make.height.equalTo(2.5)
            make.centerX.equalTo(emailBtn)
            make.top.equalTo(emailBtn.snp_bottom)
        }
        
        addSubview(phoneBtn)
        phoneBtn.snp.makeConstraints { (make) in
            make.centerY.equalToSuperview()
            make.centerX.equalToSuperview().multipliedBy(0.75)
        }
        
        addSubview(phoneBtnLine)
        phoneBtnLine.snp.makeConstraints { (make) in
            make.width.equalTo(20)
            make.height.equalTo(2.5)
            make.centerX.equalTo(phoneBtn)
            make.top.equalTo(phoneBtn.snp_bottom)
        }
    }
    
    //选中状态
    private var phoneBtnSelected:NSAttributedString {
        NSAttributedString(string: LocalizableManager.localValue("phone"), attributes: [NSAttributedString.Key.font : UIFont(name: "PingFangSC-Semibold", size: 18),NSAttributedString.Key.foregroundColor:UIColor.hexColor(hexValue: 0x0F0F0F)])
    }
    private var emailBtnSelected:NSAttributedString {
        NSAttributedString(string: LocalizableManager.localValue("email"), attributes: [NSAttributedString.Key.font : UIFont(name: "PingFangSC-Semibold", size: 18),NSAttributedString.Key.foregroundColor:UIColor.hexColor(hexValue: 0x0F0F0F)])
    }
    //非选中状态
    private var phoneBtnNormal:NSAttributedString {
        NSAttributedString(string: LocalizableManager.localValue("phone"), attributes: [NSAttributedString.Key.font : UIFont(name: "PingFangSC-Regular", size: 18),NSAttributedString.Key.foregroundColor:UIColor.hexColor(hexValue: 0x5C5C5C)])
    }
    private var emailBtnNormal:NSAttributedString {
        NSAttributedString(string: LocalizableManager.localValue("email"), attributes: [NSAttributedString.Key.font : UIFont(name: "PingFangSC-Regular", size: 18),NSAttributedString.Key.foregroundColor:UIColor.hexColor(hexValue: 0x5C5C5C)])
    }
}

2.2 LoginVC.swift

class LoginVC: UIViewController, XYswitchViewDelegate {
    var isPhoneBtnSelected: Bool{
        set{
            if newValue {
                //phoneBtn被选中做相应操作
            }else{
                //emailBtn被选中做相应操作
            }
        }
        get{ true }
    }
    
    lazy var switchView:XYswitchView = {
        let switchView = XYswitchView(delegate: self)
        return switchView
    }()
    
    
    func setupUI(){
        view.addSubview(loginLabel)
        loginLabel.snp.makeConstraints { (make) in
            make.left.equalToSuperview().offset(25)
            make.top.equalToSuperview().offset(Global.statusBarHeight + 44)
        }
        
        view.addSubview(switchView)
        switchView.snp.makeConstraints { (make) in
            make.left.right.equalToSuperview()
            make.height.equalTo(50)
            make.top.equalTo(loginLabel.snp_bottom).offset(15)
        }
        
        
    }