Widget Node动态设置触摸优先级,从而方便屏蔽下方界面

Cocos2d-x
#1

cocos2dx 3.0 是利用 setTouchEnabled(bool enable) 注册触摸优先级，但是不能动态更改Widget的触摸优先级，导致在Zorder较低的，动态刷新的，注册有触摸事件的对象可以点透.

因此在Widget.h和Widget.cpp添加方法：

void Widget::setTouchPriority(int priority)
{
_touchPriority = priority;

for (auto& child : _children)
{
    if (child)
    {
        Widget* widgetChild = dynamic_cast<Widget*>(child);
        if (widgetChild)
        {
            widgetChild->setTouchPriority(this->getTouchPriority()-1);
        }
    }
}

if (!_touchEnabled)
    return;

_eventDispatcher->removeEventListener(_touchListener);
CC_SAFE_RELEASE_NULL(_touchListener);

_touchListener = EventListenerTouchOneByOne::create();
CC_SAFE_RETAIN(_touchListener);
_touchListener->setSwallowTouches(true);
_touchListener->onTouchBegan = CC_CALLBACK_2(Widget::onTouchBegan, this);
_touchListener->onTouchMoved = CC_CALLBACK_2(Widget::onTouchMoved, this);
_touchListener->onTouchEnded = CC_CALLBACK_2(Widget::onTouchEnded, this);
_touchListener->onTouchCancelled = CC_CALLBACK_2(Widget::onTouchCancelled, this);
_eventDispatcher->addEventListenerWithFixedPriority(_touchListener, _touchPriority);

}

使用前，必须开启了触摸事件。

源码下载地址：http://www.400gb.com/file/69502408
http://cocos2dx.400gb.com/

#2

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