[英]Can't switch screen [Libgdx]
我是libgdx的新手,我不知道自己做错了什么。 在我的游戏中,我只想在2个screen
之间切换(第一个是menuScreen,第二个是gameScreen)。 我已经创建了这两个screen
和一个游戏类,一切看起来都还不错。 但是当我调用我的方法setScreen(new GameScreen())
什么都没有发生。 我还应该说,我在上一个项目中使用了screen
和game
类,并且一切正常,当我将当前代码与上一个代码进行比较时,我看不到任何区别,因此非常奇怪。
这是我的MenuScreen
类:
MenuScreen implements Screen {
private SpriteBatch batch ;
private Texture texture;
private float timePassed;
public MenuScreen() {
timePassed = 0;
batch = new SpriteBatch();
texture = new Texture("texture.png");
@Override
public void render (float delta) {
timePassed += Gdx.graphics.getDeltaTime();
Gdx.gl.glClearColor(1, 0, 0, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
if (timePassed > 5) {GameClass.getInstance().setScreen(new GameScreen());} //it looks strange, but it's to check if all works properly
batch.begin();
batch.draw(texture, 0, 0);
batch.end();
}
@Override
public void dispose() {
batch.dispose();
texture.dispose();
}
@Override
public void hide() {
}
@Override
public void resume() {
}
@Override
public void pause() {
}
@Override
public void resize(int width, int height) {
}
@Override
public void show() {
}}
这是我的GameScreen
类:
GameScreen implements Screen {
private SpriteBatch batch2 ;
private Texture texture2;
public MenuScreen() {
batch2 = new SpriteBatch();
texture2 = new Texture("texture2.png");
}
@Override
public void render (float delta) {
Gdx.gl.glClearColor(1, 0, 0, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
batch2.begin();
batch2.draw(texture2, 0, 0);
batch2.end();
}
@Override
public void dispose() {
batch2.dispose();
texture2.dispose();
}
@Override
public void hide() {
}
@Override
public void resume() {
}
@Override
public void pause() {
}
@Override
public void resize(int width, int height) {
}
@Override
public void show() {
}}
和Game
类:
public class ClassGame extends Game {
public static ClassGame getInstance(){
ClassGame instance = new ClassGame();
return instance;
}
@Override
public Screen getScreen() {
return super.getScreen();
}
@Override
public void setScreen(Screen screen) {
super.setScreen(screen);
}
@Override
public void resize(int width, int height) {
super.resize(width, height);
}
@Override
public void render() {
super.render();
}
@Override
public void resume() {
super.resume();
}
@Override
public void pause() {
super.pause();
}
@Override
public void dispose() {
super.dispose();
}
public ClassGame() {
super();
}
@Override
public void create() {
MenuScreen menuScreen = new MenuScreen();
setScreen(menuScreen);
}}
这是我针对同一问题所做的工作,我为两个屏幕设置了三个类,以便在它们之间进行切换。 在这里,我使用图像角色作为按钮在第二个和第三个之间切换。在每个类中我还使用了两个构造函数,其中一个没有参数的构造函数,下面是我的代码希望您能得到它。 我的主要课程代码:
public class First extends Game{
private Game game;
public Main(){ game=this; }
public void create() {
game.setScreen(new Second(game)); }}
以下是我的第一个屏幕课程代码
public class Second implements Screen{
private Game second;
public Second(Game second){this.second=second;}
public Second(){}
// your code
Stage myStage=new Stage(new ScreenViewport());
Group myGroup=new Group();
Image secondButton=new Image(new Texture(Gdx.files.internal("image.png")));
public void show(){
myGroup.addActor(secondButton);
secondButton.addListener(new InputListener(){
second.setScreen(new Third(second)); });}
public void render(float delta) {
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
myStage.act(Gdx.graphics.getDeltaTime());
myStage.draw(); }
public void resize(int width, int height) {}
public void pause(){}
public void resume(){}
public void hide(){}
public void dispose(){}}}
还有我的下一个屏幕课程代码
public class Third implements Screen{
private Game third;
public Third(Game third){
this.third=third;}
public Third(){}
// your code
Stage myStage=new Stage(new ScreenViewport());
Group myGroup=new Group();
Image thirdButton=new Image(new Texture(Gdx.files.internal("image.png")));
public void show() {
myGroup.addActor(thirdButton);
thirdButton.addListener(new InputListener(){
third.setScreen(new Third(third));});}
public void render(float delta) {
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
myStage.act(Gdx.graphics.getDeltaTime());
myStage.draw();}
public void resize(int width, int height) { }
public void pause(){}
public void resume(){}
public void hide(){}
public void dispose(){}}}
我知道了,伙计们。 在我以前的项目中,我在getInstance()之外声明了instance
字段。 像这样 :
public static GameClass instance = new GameClass();
public static GameClass getInstance(){
return instance;
}
但是我仍然需要您的帮助。 我不知道这件小事不会让我切换屏幕。
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