如何通过委托将信息从键盘视图控制器传递到主视图控制器

protocol KeyboardViewControllerDelegate: AnyObject {
    func didReceiveInput(_ input: String)
}

class KeyboardViewController: UIViewController {
    weak var delegate: KeyboardViewControllerDelegate?

    // 假设有一个按钮，点击后将输入框的内容传递给委托
    @IBAction func sendButtonTapped(_ sender: UIButton) {
        if let inputText = inputTextField.text {
            delegate?.didReceiveInput(inputText)
        }
    }
}

class MainViewController: UIViewController, KeyboardViewControllerDelegate {
    func didReceiveInput(_ input: String) {
        // 处理接收到的输入
        print("Received input: \(input)")
        // 可以在这里更新UI或其他逻辑
    }
}

class MainViewController: UIViewController, KeyboardViewControllerDelegate {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        if let keyboardVC = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "KeyboardViewController") as? KeyboardViewController {
            keyboardVC.delegate = self
            // 假设你有一个容器视图或导航控制器来管理键盘视图控制器
            // 这里只是一个示例，具体实现可能有所不同
            addChild(keyboardVC)
            view.addSubview(keyboardVC.view)
            keyboardVC.didMove(toParent: self)
        }
    }

    // 实现委托方法
    func didReceiveInput(_ input: String) {
        print("Received input: \(input)")
    }
}