cocos 2dx 3.12 学习笔记（三） TouchTest

来源：互联网发布：集线器网络连接方式编辑：程序博客网时间：2024/06/05 05:42

触摸控制

单点触控

TouchTestLayer.h

#ifndef _TOUCH_TEST_LAYER_H_#define _TOUCH_TEST_LAYER_H_#include "cocos2d.h"USING_NS_CC;class TouchTestLayer : public Layer{public:static cocos2d::Scene* createScene();CREATE_FUNC(TouchTestLayer);virtual bool init();virtual bool onTouchBegan(Touch * touch, Event *unused_event);virtual void onTouchMoved(Touch *touch, Event *unused_event);virtual void onTouchEnded(Touch *touch, Event *unused_event);};#endif

TouchTestLayer.cpp

可以使用拉姆达表达式来实现事件的相应，但在处理的事件较多时，应单独写成方法

#include "TouchTestLayer.h"Scene* TouchTestLayer::createScene(){auto scene = Scene::create();auto layer = TouchTestLayer::create();scene->addChild(layer);return scene;}bool TouchTestLayer::init(){Layer::init();auto listener = EventListenerTouchOneByOne::create();listener->setSwallowTouches(true); //只响应它自己，吞噬其它点击事件//listener->onTouchBegan = [this](Touch * touch, Event * event)//{//log("touch began");//Vec2 location = touch->getLocation(); //得到的是OpenGL坐标//location = this->convertToNodeSpace(location);//坐标系转换，转换为当前坐标系中的一个坐标////auto sprite = Sprite::create("CloseNormal.png");//this->addChild(sprite);//sprite->setPosition(location);//return true;////return false 可以使得后面moved  ended无法执行，新手引导，可以用到，固定触摸某个范围//};////拉姆达表达式     【】 可填写 空  = 可调用变量    this/&（取地址） 可改变外部变量//listener->onTouchMoved = [this](Touch * touch, Event * event)//{//log("touch moved");//};//listener->onTouchEnded = [this](Touch * touch, Event * event)//{//log("touch ended");//Vec2 location = touch->getLocation(); //得到的是OpenGL坐标//location = this->convertToNodeSpace(location);//坐标系转换，转换为当前坐标系中的一个坐标//auto sprite = Sprite::create("CloseSelected.png");//this->addChild(sprite);//sprite->setPosition(location);//};listener->onTouchBegan = CC_CALLBACK_2(TouchTestLayer::onTouchBegan,this);listener->onTouchMoved = CC_CALLBACK_2(TouchTestLayer::onTouchMoved, this);listener->onTouchEnded = CC_CALLBACK_2(TouchTestLayer::onTouchEnded, this);_eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this);//事件分发器。return true;}bool TouchTestLayer::onTouchBegan(Touch * touch, Event *unused_event){log("touch began");Vec2 location = touch->getLocation(); //得到的是OpenGL坐标location = this->convertToNodeSpace(location);//坐标系转换，转换为当前坐标系中的一个坐标auto sprite = Sprite::create("CloseNormal.png");this->addChild(sprite);sprite->setPosition(location);return true;return true;};void TouchTestLayer::onTouchMoved(Touch * touch, Event *unused_event){log("touch moved");};void TouchTestLayer::onTouchEnded(Touch * touch, Event *unused_event){log("touch ended");Vec2 location = touch->getLocation(); //得到的是OpenGL坐标location = this->convertToNodeSpace(location);//坐标系转换，转换为当前坐标系中的一个坐标auto sprite = Sprite::create("CloseSelected.png");this->addChild(sprite);sprite->setPosition(location);}

注：只有onTouchBegan 是有返回值得，若返回值为false，则不会继续执行onTouchMoved 和 onTouchEnded 方法。

多点触控

MutiTouchTest.h

#ifndef _MUTI_TOUCH_TEST_H_#define _MUTI_TOUCH_TEST_H_#include "cocos2d.h"USING_NS_CC;class MutiTouchTest : public Layer{public:static cocos2d::Scene* createScene();CREATE_FUNC(MutiTouchTest);virtual bool init();virtual void onTouchesBegan(const std::vector<Touch*>& touches, Event *unused_event);virtual void onTouchesMoved(const std::vector<Touch*>& touches, Event *unused_event);virtual void onTouchesEnded(const std::vector<Touch*>& touches, Event *unused_event);};#endif

MutiTouchTest.cpp

#include "MutiTouchTest.h"Scene* MutiTouchTest::createScene(){auto scene = Scene::create();auto layer = MutiTouchTest::create();scene->addChild(layer);return scene;}bool MutiTouchTest::init(){Layer::init();auto lisener = EventListenerTouchAllAtOnce::create();lisener->onTouchesBegan = CC_CALLBACK_2(MutiTouchTest::onTouchesBegan,this);lisener->onTouchesMoved = CC_CALLBACK_2(MutiTouchTest::onTouchesMoved, this);lisener->onTouchesEnded = CC_CALLBACK_2(MutiTouchTest::onTouchesEnded, this);_eventDispatcher->addEventListenerWithSceneGraphPriority(lisener,this);  //事件分发器return true;}void MutiTouchTest::onTouchesBegan(const std::vector<Touch*>& touches, Event *unused_event){log("MutiTouchTest::onTouchesBegan");for (auto touch:touches){Vec2 location = touch->getLocation();location = this->convertToNodeSpace(location);}};void MutiTouchTest::onTouchesMoved(const std::vector<Touch*>& touches, Event *unused_event){log("MutiTouchTest::onTouchesMoved");};void MutiTouchTest::onTouchesEnded(const std::vector<Touch*>& touches, Event *unused_event){log("MutiTouchTest::onTouchesEnded");}

注：和单点触控类似，需注意的是调用的是 onTouches*** 方法，若还写为 onTouch*** 则会出错。另外调用方法时候传入的参数不同。

多点触控无法再电脑上进行测试，还需要移动设备。

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