auto tf = TextFieldTTF::textFieldWithPlaceHolder("请输入本局昵称","宋体",30);
    tf->setPosition(visibleSize / 2);
    this->addChild(tf);

    auto listener = EventListenerTouchOneByOne::create();
    listener->onTouchBegan = [tf](Touch* touch,Event* event) {
        if (tf->getBoundingBox().containsPoint(touch->getLocation())) {
            tf->attachWithIME();     //调用输入法
        }else{
            tf->detachWithIME();     //关闭输入法
        }
        return false;
    };
    Director::getInstance()->getEventDispatcher()->
        addEventListenerWithSceneGraPHPriority(listener,tf);
    tf->getString();                //获取内容