libgdx：IOS 屏幕键盘未持续触发事件

Question

我仅在 IOS 构建时遇到 InputProcessor 问题。此代码适用于桌面和 Android 构建但不适用于 iOS.

基本上，只要用户在屏幕键盘上键入内容，我就需要捕获一个事件。但是在 iOS 中，我只能间歇性地看到 keyTyped 的 println，并且只有当我在屏幕键盘上快速键入时才会看到。所有其他触摸只是在控制台中显示一个新行，我不确定这个新行输出来自哪里。

问题似乎源于 iOS 将事件发送回我的应用程序以及 LibGDX InputProcessor 如何接收它们。我尝试创建自己的对象，它扩展了 TextField 并实现了 InputProcessor，然后将该对象的实例设置为 inputProcessor，但我得到了相同的结果。如果我触摸屏幕上除 iOS 屏幕键盘之外的任何地方，我会持续触发事件。

这是 iOS 当我打字速度非常快时控制台输出的样子，如果我打字速度慢，则 println 永远不会显示：

game name field key typed!


game name field key typed!






game name field key typed!

在 android 设备 (nexus 7) 上做同样的事情会产生以下结果（这是我所期望的）：

I/System.out: game name field key down!
I/System.out: game name field key up!
I/System.out: game name field key typed!
I/System.out: game name field key down!
I/System.out: game name field key up!
I/System.out: game name field key typed!
I/System.out: game name field key down!
I/System.out: game name field key up!
I/System.out: game name field key typed!

这是我的代码：

public class AccountScreen implements Screen {


final PieTherapy game;
private Stage stage;

private TextField gameNameField;

public AccountScreen(final PieTherapy game) {
    this.game = game;
    initialize();
}

private void initialize() {

    Viewport vp = new StretchViewport(PieTherapy.WORLD_WIDTH, PieTherapy.WORLD_HEIGHT, game.cam);
    stage = new Stage(vp);

    Gdx.input.setInputProcessor(stage);

    TextField.TextFieldStyle tfs = new TextField.TextFieldStyle();
    tfs.font = game.fontTitle;
    tfs.fontColor = Color.WHITE;
    tfs.background = new TextureRegionDrawable(new TextureRegion(game.assets.get("menus/textline.png", Texture.class)));
    tfs.focusedBackground = new TextureRegionDrawable(new TextureRegion(game.assets.get("menus/textline-selected.png", Texture.class)));
    tfs.cursor = new TextureRegionDrawable(new TextureRegion(game.assets.get("menus/cursor.png", Texture.class)));

    gameNameField = new TextField("", tfs);
    gameNameField.setWidth(PieTherapy.WORLD_WIDTH * .80f);
    gameNameField.setFocusTraversal(true);
    gameNameField.setPosition(PieTherapy.WORLD_WIDTH *.05f, game.WORLD_HEIGHT * .68f);
    // see if the player information has already been entered (edit mode)
    gameNameField.setText(game.primaryPlayer.gameName);
    gameNameField.addListener(new InputListener(){
        @Override
        public void touchUp (InputEvent event, float x, float y, int pointer, int button) {
            System.out.println("game name field touch up!");
        }
        @Override
        public boolean touchDown (InputEvent event, float x, float y, int pointer, int button) {
            System.out.println("game name field touch down!");
            return true;
        }

        @Override
        public boolean keyDown(InputEvent event, int keycode) {
            System.out.println("game name field key down!");
            return super.keyDown(event, keycode);
        }

        @Override
        public boolean keyUp(InputEvent event, int keycode) {
            System.out.println("game name field key up!");
            return super.keyUp(event, keycode);
        }

        @Override
        public boolean keyTyped(InputEvent event, char character) {
            System.out.println("game name field key typed!");
            return super.keyTyped(event, character);
        }
    });

    gameNameField.getOnscreenKeyboard().show(true);
    gameNameField.setCursorPosition(gameNameField.getText().length());

    stage.addActor(gameNameField);

    stage.setKeyboardFocus(gameNameField);
}

@Override
public void show() {

}

@Override
public void render(float delta) {
    Gdx.gl.glClearColor(0, 0, 0f, 1);
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

    game.batch.begin();
    game.font.draw(game.batch, "Your name in the game! You can stick with the\nautomatically generated" +
                    "one or change to your own.\n Red: name is not available, " +
                    "green: available.",
            PieTherapy.WORLD_WIDTH *.36f,
            PieTherapy.WORLD_HEIGHT *.93f);

    game.batch.end();

    update(delta);
}

private void update(float delta) {

    stage.act(delta);

    stage.draw();

    game.batch.begin();

    game.batch.end();

}

@Override
public void resize(int width, int height) {

}

@Override
public void pause() {

}

@Override
public void resume() {

}

@Override
public void hide() {

}

@Override
public void dispose() {

}
}

LibGDX版本：1.9.6 RoboVM (MobiDevelop) 版本：2.3.1

我想我总能滚动自己的屏幕键盘...

Answer 1

只是想跟进以防将来有人发现自己在这里。我最终创建了自己的屏幕键盘，我无法让事件在 iOS 中持续工作。

如果以后有人有什么想补充的，我会签到接受答案。

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