Unity简单的对话框(Dialog)

可根据自己需要使用单例模式

public class DialogManager
{
    public static Dictionary DialogDic = new Dictionary();//储存所有对话框，可以根据自己需要进行管理
    private static Transform panelParent;//对话框根目录
    static DialogManager()
    {
        panelParent = GameObject.Find("Canvas").transform;
    }
    /// 

    /// 展示对话框
    /// 
    /// 对话框的类型（Prefab也要用这个类型命名）
    /// 对话框返回值的类型
    /// 回调
    public static void Show(System.Action> callback)
    {
        Show(null, callback);
    }
    /// 

    /// 展示对话框
    /// 
    /// 对话框的类型（Prefab也要用这个类型命名）
    /// 对话框返回值的类型
    /// 传参
    /// 回调
    public static void Show(object par, System.Action> callback)
    {
        string key = typeof(TDialog).Name;
        IDialog dialog;
        if (DialogDic.TryGetValue(key, out var dialogObj))//存在，获取
        {
            dialog = dialogObj as IDialog;
            dialog.OnStart(par);
        }
        else//不存在，新建
        {
            GameObject obj = Object.Instantiate(Resources.Load(key), panelParent);
            obj.name = key;
            dialog = obj.GetComponent>();
            DialogDic.Add(key, dialog);
            dialog.OnStart(par);

            dialog.CloseAction += res =>
            {
                dialog.OnExit();
                callback?.Invoke(res);
            };
        }
    }
}

/// 

/// 对话框接口，所有对话框都要继承此接口
/// 
/// 对话框返回值的类型
public interface IDialog
{
    System.Action> CloseAction { get; set; }
    void OnStart(object par = null);
    void OnExit();
}

/// 

/// 对话框返回类型（这里用作区分点击哪个按钮）
/// 
public enum DialogStatus
{
    OK, Cancel
}

/// 

/// 对话框返回值
/// 
/// 对话框返回值的类型
public class DialogResult
{
    public DialogStatus Status { get; set; }
    public TResult Result { get; set; }
}

public class QuestionDialog : MonoBehaviour, IDialog
{
    public Action> CloseAction { get; set; }

    private Button OKButton, CancelButton;
    private InputField QuestionField;
    private void Awake()
    {
        OKButton = transform.Find("OKButton").GetComponent();
        CancelButton = transform.Find("CancelButton").GetComponent();
        QuestionField = transform.Find("InputField").GetComponent();
        OKButton.onClick.AddListener(OK);
        CancelButton.onClick.AddListener(Cancel);
    }

    private void OK()
    {
        var Result = new DialogResult() { Status = DialogStatus.OK, Result = QuestionField.text };
        CloseAction.Invoke(Result);
    }
    private void Cancel()
    {
        var Result = new DialogResult() { Status = DialogStatus.Cancel };
        CloseAction.Invoke(Result);
    }

    public void OnStart(object par = null)
    {
        QuestionField.text = par?.ToString();
        gameObject.SetActive(true);
    }
    public void OnExit()
    {
        gameObject.SetActive(false);
    }
}

        DialogManager.Show("传参", res =>
        {
            if (res.Status == DialogStatus.OK)
                Debug.Log(res.Result);
            else
                Debug.Log("取消");
        });