无法显示带有文本字段的用户输入

问题描述

我正在尝试使用TextField来获取一些用户输入:

I'm trying to use a TextField to get some user input:

 public void render() {
    Gdx.gl.glClear(GL11.GL_COLOR_BUFFER_BIT);
    Gdx.gl.glClearColor(0, 0, 0, 0);

    batch.begin();
    batch.end();
    stage = new Stage();
    Gdx.input.setInputProcessor(stage);
    Skin skin = new Skin(Gdx.files.internal("assets/uiskin.json"));

    TextButton btnLogin = new TextButton("Click", skin);
    btnLogin.setPosition(300, 300);
    btnLogin.setSize(300, 60);
    btnLogin.addListener(new ClickListener() {
        public boolean touchDown(InputEvent e, float x, float y, int point, int button) {
            System.out.println(txfUsername.getText());
            return false;
        }
    });

    txfUsername = new TextField("", skin);
    txfUsername.setPosition(300, 250);
    txfUsername.setSize(300, 40);

    stage.addActor(txfUsername);           
    stage.addActor(btnLogin);

    stage.act();
    stage.draw();
}

我得到的只是一个空白字段.用户无法以任何方式与其进行交互.

All I get is a blank field. The user can't interact with it in any way.

我遵循了此视频中的说明如何使文本字段可编辑?

I followed the instructions in this videoHow do I make the textfield editable?

推荐答案

您在render方法中使用txfUsername = new TextField ("", skin);.这样会在每个渲染器上从头开始创建一个新的TextField.

You use txfUsername = new TextField ("", skin); in your render method. That creates a new TextField from scratch on each render.

public void render() {
    Gdx.gl.glClearColor(0, 0, 0, 1);
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);


    batch.begin();
    // do other rendering ...
    batch.end();

    Gdx.app.log("MyTextField", txfUsername.getText());

    stage.act(Gdx.graphics.getDeltaTime());
    stage.draw();
}

在您的类变量中:

private TextButton btnLogin;
TextField txfUsername;

在您的方法show或create(不是render)中:

In your method show or create (not render):

@Override
public void show() {

    btnLogin = new TextButton("Click", skin);

    btnLogin.setPosition(300, 300);
    btnLogin.setSize(300, 60);
    btnLogin.addListener(new ClickListener() {
        public boolean touchDown(InputEvent e, float x, float y, int point, int button) {
            System.out.println(txfUsername.getText());
            return false;
        }
    });

    txfUsername = new TextField("", skin);
    txfUsername.setPosition(300, 250);
    txfUsername.setSize(300, 40);

    stage.addActor(txfUsername);           
    stage.addActor(btnLogin);
}

使用为该字段编写的txfUsername.getText();

我不知道您如何使用GL11，如果是GL10，我可以理解您的故障，如果在GL10中出现错误，则应该更新libgdx，GL10是一个接口，我认为libgdx中的最新版本不是带来了

I do not know how you worked with GL11, if GL10, I could understand a you malfunction, if you get error in GL10, you should update libgdx, GL10 is an interface and I think last versions for in libgdx not bring already

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