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3.cocos代码入口

模拟代码进入过程：

main.cpp

 1 #include <iostream>
 2 #include "AppDelegate.h"
 3 #include "CCApplication.h"
 4 #include "CCApplicationProtocol.h"
 5 using namespace std;
 6 
 7 int main()
 8 {
 9     AppDelegate app;
10 
11     return CCApplication::sharedApplication()->run();
12 }

AppDelegate.h

 1 #pragma once
 2 #include "CCApplication.h"
 3 class AppDelegate :
 4     public CCApplication
 5 {
 6 public:
 7     AppDelegate();
 8     virtual ~AppDelegate();
 9 
10     virtual bool applicationDidFinishLaunching();//子类实现了接口
11 };

AppDelegate.cpp

#include "AppDelegate.h"
#include <Windows.h>


AppDelegate::AppDelegate()
{
}


AppDelegate::~AppDelegate()
{
}

//真正的入口
bool AppDelegate::applicationDidFinishLaunching()
{
    MessageBoxA(0, "游戏开始", "提示", 1);
    return false;
}

CCApplication.h

 1 #pragma once
 2 #include "CCApplicationProtocol.h"
 3 
 4 class CCApplication :
 5     public CCApplicationProtocol
 6 {
 7 public:
 8     CCApplication();
 9     virtual ~CCApplication();
10 
11     int run();
12 
13     static CCApplication *sharedApplication();
14     static CCApplication *sm_pSharedApplication;
15 };

CCApplication.cpp

 1 #include "CCApplication.h"
 2 #include "stddef.h"
 3 
 4 CCApplication * CCApplication::sm_pSharedApplication = NULL;
 5 
 6 CCApplication::CCApplication()
 7 {
 8     sm_pSharedApplication = this;//注意这个this是子类AppDelegate传过来的
 9 }
10 
11 
12 CCApplication::~CCApplication()
13 {
14 }
15 //run调用父类的applicationDidFinishLaunching()方法，父类的方法在子类中实现
16 int CCApplication::run()
17 {
18     applicationDidFinishLaunching();
19     return 0;
20 }
21 
22 CCApplication * CCApplication::sharedApplication()
23 {
24     if(sm_pSharedApplication != NULL)
25         return sm_pSharedApplication;
26 }

CCApplicationProtocol.h

1 #pragma once
2 class CCApplicationProtocol
3 {
4 public:
5     CCApplicationProtocol();
6     virtual ~CCApplicationProtocol();
7 
8     virtual bool applicationDidFinishLaunching() = 0;
9 };

CCApplicationProtocol.cpp

#include "CCApplicationProtocol.h"



CCApplicationProtocol::CCApplicationProtocol()
{
}


CCApplicationProtocol::~CCApplicationProtocol()
{
}

运行截图：

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原文地址：https://www.cnblogs.com/xiaochi/p/8337074.html