Libgdx V1.3.1飞溅屏幕吐温错误：线程中的异常"LWJGL应用程序"java.lang.运行时异常：没有找到目标的吐温访问器

Question

在我的android、桌面和html libgdx项目中，我很难实现Universal Tween引擎（请注意，这是使用gradle的libgdx版本1.3.1的一个问题）。我按照github wiki上的说明，使用了下面链接中显示的fileTree方法。https://github.com/libgdx/libgdx/wiki/Universal-Tween-Engine

我设法将核心和ANDROID项目的构建路径设置为包括两个tween engine JAR。这些类很容易导入，但在运行桌面项目时，我会遇到以下错误：

线程“LWJGL应用程序”java中出现异常。lang.RuntimeException:在AurelianRibon找不到目标的TweenAccessor。特温尼。吐温。在Aurelianribon建立（Tween.java:787）。特温尼。吐温。在Aurelianribon建立（Tween.java:79）。特温尼。伯瑟温。从Aurelianribon开始（BaseTween.java:85）。特温尼。特温经理。在Aurelianribon添加（TweenManager.java:61）。特温尼。伯瑟温。从com开始（BaseTween.java:98）。无穷大。杀死云彩。屏幕。泼洒在com上展示（Splash.java:58）。糟糕的逻辑。gdx。游戏在com上设置屏幕（Game.java:61）。无穷大。杀死云彩。杀死云彩。在com上创建（KillTheClouds.java:14）。糟糕的逻辑。gdx。后端。lwjgl。LWJglaplication。com上的mainLoop（LwjglApplication.java:136）。糟糕的逻辑。gdx。后端。lwjgl。LwjglApplication 1美元。运行（LwjglApplication.java:114）

这是我的密码

Splash.java

package com.infinitybit.killtheclouds.Screens;

import aurelienribon.tweenengine.Tween;
import aurelienribon.tweenengine.TweenManager;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Screen;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.Sprite;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.infinitybit.killtheclouds.KillTheClouds;
import com.infinitybit.killtheclouds.TweenStuff.SplashAccessor;

public class Splash implements Screen {

    public static int SCREEN_WIDTH = Gdx.graphics.getWidth();
    public static int SCREEN_HEIGHT = Gdx.graphics.getHeight();

    private KillTheClouds game;

    private SpriteBatch splashpaper;
    private Sprite splashimage;

    private TweenManager tweenManager;

    public Splash(KillTheClouds game) {

        this.game = game;

    }

    @Override
    public void show() {

        // TweenSTUFF
        tweenManager = new TweenManager();
        Tween.registerAccessor(Sprite.class, new SplashAccessor());

        splashpaper = new SpriteBatch();

        Texture splashTexture = new Texture("images/splash/logo.png");
        splashimage = new Sprite(splashTexture);

        // image size
        splashimage.setSize(SCREEN_WIDTH / 1.5f, SCREEN_HEIGHT / 2);
        // center image
        splashimage.setPosition(SCREEN_WIDTH / 2 - splashimage.getWidth() / 2,
                SCREEN_HEIGHT / 2 - splashimage.getHeight() / 2);

        Tween.set(splashTexture, SplashAccessor.ALPHA).target(0)
                .start(tweenManager);

        Tween.to(splashTexture, SplashAccessor.ALPHA, 3).target(1)
                .start(tweenManager);

        Tween.to(splashTexture, SplashAccessor.ALPHA, 2).target(0).delay(2)
                .start(tweenManager);

    }

    @Override
    public void render(float delta) {

        Gdx.gl.glClearColor(0, 0, 0, 1);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

        // update tween
        tweenManager.update(delta);

        splashpaper.begin();

        splashimage.draw(splashpaper);

        splashpaper.end();

    }

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

    }

    @Override
    public void hide() {

    }

    @Override
    public void pause() {

    }

    @Override
    public void resume() {

    }

    @Override
    public void dispose() {

    }

}

喷溅存取器。JAVA

package com.infinitybit.killtheclouds.TweenStuff;

import aurelienribon.tweenengine.TweenAccessor;

import com.badlogic.gdx.graphics.g2d.Sprite;


public class SplashAccessor implements TweenAccessor<Sprite> {

    public static final int ALPHA = 0;

    @Override
    public int getValues(Sprite target, int tweenType, float[] returnValues) {

        switch (tweenType) {

        case ALPHA:
            returnValues[0] = target.getColor().a;
        return 1;

        default:
            assert false;
        return -1;

        }

    }

    @Override
    public void setValues(Sprite target, int tweenType, float[] newValues) {

        float defRed = target.getColor().r;
        float defGreen = target.getColor().g;
        float defBlue = target.getColor().b;

        switch(tweenType){

            case ALPHA:
                target.setColor(defRed, defGreen, defBlue, newValues[0]);
            break;

            default:
                assert false;

        }

    }


}

Answer 1

你的飞溅纹理不是雪碧的类型，它是纹理！！！

这就是你的问题。从splashTexture创建splashSprite，并将其命名为：

Tween.to(splashSprite, SplashAccessor.ALPHA, 3).target(1)
            .start(tweenManager);

希望有帮助！