什么是setTouchAreaBindingOnActionDownEnabled的目的 - AndEngine？ [英] What is the purpose of setTouchAreaBindingOnActionDownEnabled - AndEngine?

问题描述

我开始与AndEngine工作，我看到一些教程使用 setTouchAreaBindingOnActionDownEnabled ，但没有解释其用途。

I am starting to work with AndEngine and I see that some tutorials use setTouchAreaBindingOnActionDownEnabled but don't explain its purpose.

为什么我需要用 onAreaTouched 一起用这种方法？
不应该是 onAreaTouched 够了，在它的内部检测是否是向下或向上？

Why I need to use this method together with onAreaTouched? Should not be onAreaTouched enough and detect inside of it whether is DOWN or UP?

感谢

推荐答案

该方法的目的 setTouchAreaBindingOnActionDownEnabled 是要能够绑定精灵/按钮/等到场景/ HUD。

The purpose of the method setTouchAreaBindingOnActionDownEnabled is to be able to "Bind" the sprite/button/etc to a scene/hud.

例如，如果你只使用了 onAreaTouched 在一个赛车游戏的控制器。当你点击GAZ（动作下）它加速，当你松开手指（处分）减速。但是，如果你点击，并保持你的手指轻扫和（移动）按钮区域会发生什么？
在这种情况下，按钮操作起来不叫，虽然你的手指不再按钮上的车依然保持着加速。

For example, if you only use the onAreaTouched for a controller in a race game. When you click on gaz (action down) it accelerates and when you remove your finger ( action up ) decelerates. But what happens if you click and keep your finger and swipe ( move ) outside the button area? In this case the button action up is not called and although your finger is no longer on the button the car still keeps accelerating.

因此​​，代替手工管理这种情况下， setTouchAreaBindingOnActionDownEnabled 将处理这种类型的场景为你的

Thus instead of managing this scenario manually, the setTouchAreaBindingOnActionDownEnabled will handle this type of scenario for you

来源：AE开发商

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