cocos3.X拖动精灵移动

来源：互联网发布：重磅数据编辑：程序博客网时间：2024/04/28 20:18

1、创建一个精灵sprite；

2、一个触摸事件 listener ，设置listener的onTouchBegan,onTouchMoved,onTouchEnded;

3、将sprite 和 listener关联起来。

Sprite* sprite1 = Sprite::create("pk.png");this->addChild(sprite1, 0);sprite1->setPosition(ccp(300, 400));sprite1->setTag(1);Sprite*  sprite2 = Sprite::create("pk.png");this->addChild(sprite2, 0);sprite2->setPosition(ccp(200, 400));sprite2->setTag(0);Sprite*  sprite3 = Sprite::create("pk.png");this->addChild(sprite3, 0);sprite3->setPosition(ccp(400, 400));sprite3->setTag(0);auto listener1 = EventListenerTouchOneByOne::create();//创建一个触摸监听 listener1->setSwallowTouches(true); //设置是否想下传递触摸//通过 lambda 表达式 直接实现触摸事件的回掉方法listener1->onTouchBegan = [](Touch* touch, Event* event){auto target = static_cast<Sprite*>(event->getCurrentTarget());Point locationInNode = target->convertToNodeSpace(touch->getLocation());Size s = target->getContentSize();Rect rect = Rect(0, 0, s.width, s.height);if (rect.containsPoint(locationInNode)){log("sprite began... x = %f, y = %f", locationInNode.x, locationInNode.y);target->setOpacity(180);return true;}return false;};listener1->onTouchMoved = [](Touch* touch, Event* event){auto target = static_cast<Sprite*>(event->getCurrentTarget());target->setPosition(target->getPosition() + touch->getDelta());};listener1->onTouchEnded = [=](Touch* touch, Event* event){auto target = static_cast<Sprite*>(event->getCurrentTarget());log("sprite onTouchesEnded.. ");target->setOpacity(255);};_eventDispatcher->addEventListenerWithSceneGraphPriority(listener1, sprite1);_eventDispatcher->addEventListenerWithSceneGraphPriority(listener1->clone(), sprite2);_eventDispatcher->addEventListenerWithSceneGraphPriority(listener1->clone(), sprite3);

如果想实现多个精灵拖动，使用clone方法

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