触摸事件主要需要弄清的事情

• 是否吞噬setSwallowTouches
• onTouchBegin返回的意义

代码如下:

#include "HelloWorldScene.h"

USING_NS_CC;

Scene* HelloWorld::createScene()
{
    auto scene = Scene::create();
    auto layer = HelloWorld::create();
    scene->addChild(layer);
    return scene;
}
bool HelloWorld::init()
{
    if ( !Layer::init() )
    {
        return false;
    }
    Size winSize = Director::getInstance()->getWinSize();
    auto sprite = Sprite::create("HelloWorld.png");
    sprite->setPosition(Vec2(winSize.width / 2,winSize.height / 2 ));
    this->addChild(sprite,0);
    m_nvShenSp = Sprite::create("nvshen.jpg");
    m_nvShenSp->setPosition(Vec2(winSize.width / 2,winSize.height / 2));
    this->addChild(m_nvShenSp);

    addTouchEvent();
    return true;
}
//添加触摸事件
void HelloWorld::addTouchEvent(){
    auto dispatcher = Director::getInstance()->getEventDispatcher();
    auto listener1 = EventListenerTouchOneByOne::create();
    listener1->onTouchBegan = CC_CALLBACK_2(HelloWorld::onTouchBegan,this);
    listener1->onTouchMoved = CC_CALLBACK_2(HelloWorld::onTouchMoved,this);
    listener1->onTouchEnded = CC_CALLBACK_2(HelloWorld::onTouchEnded,this);
    listener1->setSwallowTouches(true);//设置吞噬按钮
    //给Layer添加触摸事件
    dispatcher->addEventListenerWithSceneGraPHPriority(listener1,this);
};
bool HelloWorld::onTouchBegan(Touch *touch,Event *unused_event){
    log("onTouchBegan");
    Point touchPoint = touch->getLocation();
    Rect nvShenRect = m_nvShenSp->getBoundingBox();//这个函数的内部，其实是给你一个Rect大小,一个在父类的Point
    if (nvShenRect.containsPoint(touchPoint)) //如果点击的点落在女神图片上（因为他们同属于一个父控件layer所以可以这么转换，否则请查看坐标转换）
    {
        return false;//false就往下传递，被按钮吃掉，onTouchMoved,onTouchEnded接收不到
    }
    return true; //如果没有点击到女神的图片上，就不往下传递,不往下传递，被onTouchMoved,onTouchEnded接收
};
void HelloWorld::onTouchMoved(Touch *touch,Event *unused_event){
    log("onTouchMoved");
};
void HelloWorld::onTouchEnded(Touch *touch,Event *unused_event){
    log("onTouchEnded");
};
void HelloWorld::onTouchCancelled(Touch *touch,Event *unused_event){
};