AndEngine - 有问题，安装一个新的Sprite实体 [英] AndEngine -- Having problems with attaching a new Sprite Entity

问题描述

我一直在做的试验和错误的时间，现在我还没有想出的东西的解决方案似乎很简单.... 我现在用的是

I've been doing trial and error for hours now and I have not yet come up with a solution for something that seems simple.... I am using the

public void onConfigurationChanged(Configuration newConfig)

方法来检测用户是否改变了他们的屏幕方向。 最终，它被发送到这个方法，其中该实体连接于场景：

method to detect if a user has changed their screen orientation. Eventually, it gets sent to this method where the entitys are attached to the scene:

public void BuildScene(final Scene scene){

       // Destroys current scene.
            scene.detachChildren();

        this.SpriteDayPortrait = new Sprite(-200, 0, 2000, 500, this.mParallaxLayerDayPortrait);
        this.SpriteDayLandscape = new Sprite(0, 0, 750, 500, this.mParallaxLayerDayLandscape);

    if (prefs.getString("frontImage", "1").equals("3"))
            {
                //Day
                if (orientationValue.equals("PORTRAIT"))
                {
                    Log.d("Orientation", "Portrait");
                    scene.detachChild(SpriteDayLandscape);

                    scene.attachChild(SpriteDayPortrait);

                }
                else if (orientationValue.equals("LANDSCAPE"))
                {
                    Log.d("Orientation", "Landscape");
                    scene.detachChild(SpriteDayPortrait);

                    scene.attachChild(SpriteDayLandscape);

                }
            }

}

该方法被调用来首次创建墙纸时，以及当用户更改屏幕方向。

This method is called to when the wallpaper is first created, and also when a user changes screen orientation.

我已经测试了这个在我的手机，它成功地显示了日志消息当我切换方向，这意味着它是做什么，我想要它做的。

I have tested this on my phone and it successfully displays the log messages when I switch orientations, which means that it is doing it what I want it to do.

问题 -

的精灵孩子不分离时，此方法被调用来。如果我在人像模式，并切换到风景，人像精灵依然存在，我希望它消失，反之亦然。

The sprite child does not detach when this method is called to. If I am in Portrait mode, and switch to Landscape, the portrait sprite remains and I would like it to disappear, and vice versa.

我会非常高兴，如果有人可以回答这个问题我一直有头疼了本作大概要20个小时。

I would be extremely happy if anyone could answer this I've been having a headache over this for probably 20 hours.

推荐答案

它看起来像这个问题可能是逻辑：你调用分行有关分离他们或安装之前重新分配SpriteDayPortrait和SpriteDayLanscape

It looks like the problem might be logic: You reassign the SpriteDayPortrait and SpriteDayLanscape before calling the branch about detaching them or attaching them.

所以每个分离脚本调用它指的是时间的新的精灵的实例，而不是要分离的旧实例。

So each time the detach script is called it is referring to a new instance of the sprite, rather than the old instance that you want to detach.

尝试将精灵的分配到另一个功能是创建时的情景，这只是所谓的：

try moving the assignment of the sprites into another function that is only called when the scene is created:

// Move this
this.SpriteDayPortrait = new Sprite(-200, 0, 2000, 500, this.mParallaxLayerDayPortrait);
        this.SpriteDayLandscape = new Sprite(0, 0, 750, 500, this.mParallaxLayerDayLandscape);

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