[英]Can't switch screen [Libgdx]
我是libgdx的新手,我不知道自己做錯了什么。 在我的游戲中,我只想在2個screen
之間切換(第一個是menuScreen,第二個是gameScreen)。 我已經創建了這兩個screen
和一個游戲類,一切看起來都還不錯。 但是當我調用我的方法setScreen(new GameScreen())
什么都沒有發生。 我還應該說,我在上一個項目中使用了screen
和game
類,並且一切正常,當我將當前代碼與上一個代碼進行比較時,我看不到任何區別,因此非常奇怪。
這是我的MenuScreen
類:
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() {
}}
這是我的GameScreen
類:
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
類:
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);
}}
這是我針對同一問題所做的工作,我為兩個屏幕設置了三個類,以便在它們之間進行切換。 在這里,我使用圖像角色作為按鈕在第二個和第三個之間切換。在每個類中我還使用了兩個構造函數,其中一個沒有參數的構造函數,下面是我的代碼希望您能得到它。 我的主要課程代碼:
public class First extends Game{
private Game game;
public Main(){ game=this; }
public void create() {
game.setScreen(new Second(game)); }}
以下是我的第一個屏幕課程代碼
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(){}}}
還有我的下一個屏幕課程代碼
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,伙計們。 在我以前的項目中,我在getInstance()之外聲明了instance
字段。 像這樣 :
public static GameClass instance = new GameClass();
public static GameClass getInstance(){
return instance;
}
但是我仍然需要您的幫助。 我不知道這件小事不會讓我切換屏幕。
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