核心: 通过系统的通知 获取 键盘的高度尺寸, 再移动相应的视图;

得到键盘的 Frame 信息：
let eFrame = notification?.userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect

企业微信截图_987c6631-4e19-4b09-a69a-ae2693295047.png

• 1. 解析出键盘的高度:

import Foundation
import UIKit
// 全局用: 静态工具
struct TyeTool{
    
    static func yeGetKeyboardFrame(notification: Notification?) -> CGRect
    { // 得到键盘的信息：Frame
        guard let eUserInfo = notification?.userInfo, let eFrame = eUserInfo[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect
        else { return CGRect(x: 0, y: 0, width: 0, height: 0)}
        
        return eFrame
    }
}

• 2. 监听键盘的弹窗与隐藏 (通知):

    //--- 系统通知监听 键盘显示和隐藏 : 解决 键盘遮挡输入框的问题:
    func yeAddNotificationForkeyboard(){
        NotificationCenter.default.addObserver(self,
                                               selector: #selector(yeKeyboardWillShow(_:)),
                                               name: UIResponder.keyboardWillShowNotification, object: nil)
        
        NotificationCenter.default.addObserver(self,
                                               selector: #selector(yeKeyboardWillHide(_:)),
                                               name: UIResponder.keyboardWillHideNotification, object: nil)
    }

• 3. 根据得到的 键盘高度 移动相应的视图 :

    @objc func yeKeyboardWillShow(_ notification: Notification?)
    { // 键盘 弹出；
        print("---键盘 弹出--")
        // 1. 得到 键盘的高度:
        let eKeyboardFrame = TyeTool.yeGetKeyboardFrame(notification: notification)
        let eKeyboardH = eKeyboardFrame.height
        
        UIView.animate(withDuration: 0.3, delay: 0.0, animations: { [self] in
            self.eUITextField.frame.origin.y -= eKeyboardH
        }) { eBool in
            print("---动画完成--")
        }
    }

    @objc func yeKeyboardWillHide(_ notification: Notification?)
    { // 键盘 隐藏;
        print("---键盘 隐藏--")
        let eKeyboardFrame = TyeTool.yeGetKeyboardFrame(notification: notification)
        let eKeyboardH = eKeyboardFrame.height
        
        UIView.animate(withDuration: 0.3, delay: 0.0, animations: { [self] in
            self.eUITextField.frame.origin.y += eKeyboardH
        }) { eBool in
            print("---动画完成--")
        }
    }

    deinit {
        NotificationCenter.default.removeObserver(self)
    }