如何使用 c++ 在 cocos2dx 中定义非静态方法

How to define non-static method in cocos2dx with c++

本文关键字：定义 静态方法 cocos2dx 何使用 c++      更新时间：2023-10-16

我想定义一个自定义的非静态方法，如下所示：

这是.h文件

#ifndef __HELLOWORLD_SCENE_H__
#define __HELLOWORLD_SCENE_H__
#include "cocos2d.h"
class HelloWorld : public cocos2d::Scene
{
private:
Director *dir;
SpriteFrameCache *spriteCache;
Size visiableSize;
Vec2 visialbeOrigin;
cocos2d::Sprite getMySpriteByName(const std::string &name);
cocos2d::Sprite getBrickByName(const std::string &name);
public:
static cocos2d::Scene* createScene();
virtual bool init();
// a selector callback
void menuCloseCallback(cocos2d::Ref* pSender);
// implement the "static create()" method manually
CREATE_FUNC(HelloWorld);
};
#endif // __HELLOWORLD_SCENE_H__

以下是.cpp文件中定义getMySpriteByName()和getBrickByName的方式：

cocos2d::Sprite HelloWorld::getMySpriteByName(const std::string &name) {
return Sprite::createWithSpriteFrameName(name);
}
cocos2d::Sprite HelloWorld::getBrickByName(const std::string &name) {
auto brickSprite = this->getMySpriteByName(name);
return brickSprite;
}

但是IDE或编译器不允许我这样做

我做错了什么？

构建错误是：

Severity    Code    Description Project File    Line    Suppression State
Error (active)  E0415   no suitable constructor exists to convert from "cocos2d::Sprite *" to "cocos2d::Sprite" onestep d:cocosonestepClassesHelloWorldScene.cpp    14  
Error (active)  E0330   "cocos2d::Sprite::Sprite(const cocos2d::Sprite &)" (declared at line 725 of "d:cocosonestepcocos2dcocos2dCCSprite.h") is inaccessible onestep d:cocosonestepClassesHelloWorldScene.cpp    19  
Error (active)  E0330   "cocos2d::Sprite::Sprite(const cocos2d::Sprite &)" (declared at line 725 of "d:cocosonestepcocos2dcocos2dCCSprite.h") is inaccessible onestep d:cocosonestepClassesHelloWorldScene.cpp    20  
Error (active)  E0020   identifier "visibleSize" is undefined   onestep d:cocosonestepClassesHelloWorldScene.cpp    51

你错过了*(指针(

在.h应该是

cocos2d::Sprite* getMySpriteByName(const std::string &name);
cocos2d::Sprite* getBrickByName(const std::string &name);

在.cpp应该是

cocos2d::Sprite* HelloWorld::getMySpriteByName(const std::string &name) {
return Sprite::createWithSpriteFrameName(name);
}
cocos2d::Sprite* HelloWorld::getBrickByName(const std::string &name) {
auto brickSprite = this->getMySpriteByName(name);
return brickSprite;
}
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