以编程方式触发UITextField的editingChanged

import UIKit

class ViewController: UIViewController, UITextFieldDelegate {
    
    @IBOutlet weak var textField: UITextField!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        textField.delegate = self
    }
    
    // 编程方式触发 editingChanged
    func simulateEditingChanged() {
        let currentText = textField.text ?? ""
        let newText = currentText + "a" // 模拟添加一个字符
        textField.text = newText
        textField.sendActions(for: .editingChanged)
    }
    
    // UITextFieldDelegate 方法
    func textFieldDidChange(_ textField: UITextField) {
        print("Text changed to: \(textField.text ?? "")")
        // 在这里执行文本变化后的逻辑
    }
}