Swift在文本输入过程中验证2 uitextfield密码

import UIKit

class ViewController: UIViewController, UITextFieldDelegate {
    
    @IBOutlet weak var passwordTextField: UITextField!
    @IBOutlet weak var confirmPasswordTextField: UITextField!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 设置代理
        passwordTextField.delegate = self
        confirmPasswordTextField.delegate = self
    }
    
    // UITextFieldDelegate方法，当用户输入文本时调用
    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        // 验证密码是否匹配
        if textField == confirmPasswordTextField {
            let newPassword = (textField.text as NSString?)?.replacingCharacters(in: range, with: string)
            let originalPassword = passwordTextField.text
            
            if newPassword == originalPassword {
                // 密码匹配，可以继续操作
                // 例如，启用注册按钮
            } else {
                // 密码不匹配，显示错误消息
                // 例如，显示密码不匹配的提示
            }
        }
        
        return true
    }
}