节点对象外部的触摸也响应了触摸事件

Question

在我的代码中，我添加了两个精灵，类型为 .png，大小为 110*150。两个触摸侦听器被分配给每个精灵。不知何故，无论我触摸到哪里，即使我触摸到sprite之外，listerner2和listener都会响应，并且代码会打印listener2listener1无论我触摸到哪里，我的代码有什么问题？

Scene* DemoScene::create()
{
    auto demoScene = Scene::create();

    if (demoScene == NULL) {
        return NULL;
    }



    Size visibleSize = Director::getInstance()->getVisibleSize();
    Vec2 origin = Director::getInstance()->getVisibleOrigin();

    auto demoSprite = Sprite::create("1.png");
    demoSprite->setPosition(Vec2(origin.x + visibleSize.width/2, origin.y + visibleSize.height/2));
    demoScene->addChild(demoSprite);



    auto demoSprite2 = Sprite::create("1.png");
    demoSprite2->setPosition(Vec2(origin.x + visibleSize.width/3, origin.y + visibleSize.height/3));
    demoScene->addChild(demoSprite2);



    auto listener = EventListenerTouchOneByOne::create();
//    listener->setSwallowTouches(true);
    listener->onTouchBegan = [](Touch *touch, Event *event){
        printf("listener1");
        return true;
    };

    auto listener2 = EventListenerTouchOneByOne::create();
//    listener2->setSwallowTouches(true);
    listener2->onTouchBegan = [](Touch *touch, Event *event){
        printf("listener2");
        return true;
    };



    Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(listener, demoSprite);
    Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(listener2, demoSprite2);


    return demoScene;

}

Answer 1

事件侦听器不会检查点击是否在 Sprite 内部。你应该手动控制它。如果 demoSprite 被触摸，在 onTouchBegan 方法上返回 true 将阻止将触摸传播到其他侦听器。（如果 swallow touches 设置为 true）

auto listener = EventListenerTouchOneByOne::create();
listener->setSwallowTouches(true);
listener->onTouchBegan = [](Touch *touch, Event *event){

    // check if the touch is inside the target
    Vec2 locationInNode = event->getCurrentTarget()->convertToNodeSpace(touch->getLocation());
    Size s = event->getCurrentTarget()->getContentSize();
    Rect rect = Rect(0,0, s.width, s.height);

    if (rect.containsPoint(locationInNode)) {
        printf("listener1");
        return true;
    }

    return false;
};


auto listener2 = EventListenerTouchOneByOne::create();
listener2->setSwallowTouches(true);
listener2->onTouchBegan = [](Touch *touch, Event *event){

    // check if the touch is inside the target
    Vec2 locationInNode = event->getCurrentTarget()->convertToNodeSpace(touch->getLocation());
    Size s = event->getCurrentTarget()->getContentSize();
    Rect rect = Rect(0,0, s.width, s.height);

    if (rect.containsPoint(locationInNode)) {
        printf("listener2");
        return true;
    }

    return false;
};

节点对象外部的触摸也响应了触摸事件

Touches outside a Node object also responded touch event

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