在JavaFX中使用1个阶段和多个场景登录应用程序 [英] Login Application with 1 stage and multiple scene in JavaFX

问题描述

我正在做一个时间轴项目。我已经成功创建了一个登录系统和菜单，但是当我按下按钮时，我会这样做，它会打开一个新窗口（带有舞台，场景）。我读过这不是最好的方法。最好的方法是只有1个主要阶段，而那个是我启动应用程序时的登录。

I am doing a timeline project. I have successfully created a login system and menus for everything, but when I press the buttons I have done so it will open a new window(with stage, scenes). I have read that it isn't the best approach. The best way would be to only have 1 primary stage, and that one would be when I launch the application, the login.

但是我已经找到了有关一个阶段的多个场景的信息，但我没有找到任何好的解决方案。真的非常感谢一些帮助;）希望你明白我想要实现的目标。值得一提的是，i =我正在处理Scenebuilder和fxml文件，所以我想要的主要是将新的.fxml场景加载到主舞台上。

But I have looked for information about multiple scenes with one stage but I have not found any good solutions. Would really really appreciate some help ;) Hopefully you understand what I want to achieve. Worth mentioning, i=I'm dealing with Scenebuilder and fxml files so I all I want to basically do is load a new .fxml scene onto the primary stage.

所以我查看了另一个线程，尝试做一个处理所有场景变化的VistaFramework。
但是我不完全理解它，我不能让它工作。

So I have looked in another thread and try to do a VistaFramework that handles all of the scene changes. But I don't understand it fully, and I cant get it to work.

package application;

import javafx.fxml.FXMLLoader;

import java.io.IOException;

import controllers.MainController;

/**
 * Utility class for controlling navigation between vistas.
 *
 * All methods on the navigator are static to facilitate
 * simple access from anywhere in the application.
 */
public class VistaNavigator {

    /**
     * Convenience constants for fxml layouts managed by the navigator.
     */
    public static final String MAIN    = "LoginGUI.fxml";
    public static final String NEW_USER = "NewUserGUI.fxml";
    public static final String STARTMENU = "StartMenuGUI.fxml";

    /** The main application layout controller. */
    private static MainController mainController;

    /**
     * Stores the main controller for later use in navigation tasks.
     *
     * @param mainController the main application layout controller.
     */
    public static void setMainController(MainController mainController) {
        VistaNavigator.mainController = mainController;
    }

    /**
     * Loads the vista specified by the fxml file into the
     * vistaHolder pane of the main application layout.
     *
     * Previously loaded vista for the same fxml file are not cached.
     * The fxml is loaded anew and a new vista node hierarchy generated
     * every time this method is invoked.
     * @param fxml the fxml file to be loaded.
     */

    public static void loadVista(String fxml) {
        try {
            mainController.setVista(
                FXMLLoader.load(
                    VistaNavigator.class.getResource(
                        fxml
                    )
                )
            );
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}

我得到loadVista（）中的错误。在mainController.setVista上获取以下错误（MainController类型中的方法setVista（Node）不适用于参数（对象）

I get a error in loadVista(). Get the following error at mainController.setVista( "The method setVista(Node) in the type MainController is not applicable for the arguments (Object)"

推荐答案

每个FXML文件不一定是新场景。

fxml只是一个视图文件，其根元素作为任何布局由Javafx提供。它可能有多个布局（作为根布局的一部分）和控制，具体取决于您的要求。

A fxml is just a view file with its root element as any of the Layouts provided by Javafx. It may have multiple Layouts(as a part of the root layout) and controls depending on your requirement.

要了解有关fxml的更多信息，您可以查看

To know more about fxml, you can view

Java vs JavaFX Script vs FXML。哪种更好的JavaFX编程方式？

FXML教程

http://docs.oracle.com/javafx/2/fxml_get_started/jfxpub-fxml_get_started.htm

现在，一旦你的FXML准备就绪，你可以用不同的方式加载它：

Now, once your FXML is ready, you can load it in different ways :

1. 加载你的场景根


2. 作为已加载的LAYOUT的一部分加载


3. 加载作为新场景的根并将其分配给当前阶段

为了帮助您理解上述各点，这里有一个例子。在这里，我演示了一个 LoginController 类，它是一个用于加载 FXML 的控制器。

To help you understand the above points here is an example for each of them. Here, I am demonstrating a LoginController class which is a Controller for loading the FXML.

示例 - 1

FXMLLoader loader = new FXMLLoader(LoginController.class.getResource("root.fxml"));
AnchorPane login = (AnchorPane) loader.load();
Scene scene = new Scene(login); 

示例 - 2

FXMLLoader loader = new FXMLLoader(LoginController.class.getResource("root.fxml"));
AnchorPane login = (AnchorPane) loader.load();
BorderPane borderPane = (BorderPane)scene.getRoot();
borderPane.setCenter(login);

示例 - 3

FXMLLoader loader = new FXMLLoader(LoginController.class.getResource("root.fxml"));
AnchorPane login = (AnchorPane) loader.load();
Scene scene = new Scene(login);
stage.setScene(scene);//Stage loads the new scene, which has the layout of the fxml

NB 有关如何在不同控制器上访问舞台/场景的详细信息，请通过

N.B. For more details on how to access Stage/Scene on different controllers please go through

https://community.oracle.com/message/11251866

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