在达到字符数后，如何以编程方式将光标从一个NSTextField移到另一个？

import Cocoa

class ViewController: NSViewController {
    @IBOutlet weak var textField1: NSTextField!
    @IBOutlet weak var textField2: NSTextField!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 监听textField1的文本变化
        NotificationCenter.default.addObserver(self, selector: #selector(textField1DidChange(_:)), name: NSControl.textDidChangeNotification, object: textField1)
    }
    
    @objc func textField1DidChange(_ notification: Notification) {
        let maxLength = 10 // 设置字符数限制
        if let textField = notification.object as? NSTextField, textField == textField1 {
            if textField.stringValue.count >= maxLength {
                // 将光标从textField1移动到textField2
                textField2.becomeFirstResponder()
            }
        }
    }
}