CrossApp project structure and entrance

If I create a project called HelloCrossApp, a project directory called HelloCrossApp will appear under the project folder at the root of the engine. Let's open this directory to see the structure of the following image:

Let's open the engineering configuration used by our respective platforms, and I'll take a screenshot of win vs2013 as an example

Open the Classics directory under HelloCrossApp and see the following structure:

I quote CAWindow and CAViewController from the API here

What is CAWindow?

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What is CAViewController?

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#ifndef  _APP_DELEGATE_H_
#define  _APP_DELEGATE_H_
 
#include "CrossApp.h"
 
/**
@brief    The CrossApp Application.
The reason for implement as private inheritance is to hide some interface call by CAApplication.
*/
 
class  AppDelegate : private CrossApp::CCApplication
{
public:
    AppDelegate();
    virtual ~AppDelegate();
     
    /**
    @brief    Implement CAApplication and CCScene init code here.
    @return true    Initialize success, app continue.
    @return false   Initialize failed, app terminate.
    */
     
    /*
    这个函数用于实现CAApplication和CAWindow（CCScene应该为注释的错误，以后版本会修正）的初始化
    如果返回true，初始化成功，程序正常运行
    如果返回false，初始化失败，程序终止运行
    */
     
    virtual bool applicationDidFinishLaunching();
    
    /*
    @brief  The function be called when the application enter background
    @param  the pointer of the application
    */
     
    /*
    当程序进入后台运行时，此函数会被调用（例如，电话）
    */
     
    virtual void applicationDidEnterBackground();
     
    /*
    @brief  The function be called when the application enter foreground
    @param  the pointer of the application
    */
     
    /*
    当程序从后台切回被激活时调用此函数
    */
     
    virtual void applicationWillEnterForeground();
};
#endif // _APP_DELEGATE_H_

Let's take a look at .cpp in the Application

#include "AppDelegate.h"
#include "RootWindow.h"
 
USING_NS_CC;
 
AppDelegate::AppDelegate()
{
}
 
AppDelegate::~AppDelegate() 
{
     
}
 
bool AppDelegate::applicationDidFinishLaunching()
{
    // initialize director
    //初始化direction
    CAApplication* pDirector = CAApplication::getApplication();
     
    //初始化窗口
    CCEGLView* pEGLView = CCEGLView::sharedOpenGLView();
    pDirector->setOpenGLView(pEGLView);
     
    // run
     
    //启动 RootWindow入口
    pDirector->runWindow(RootWindow::create());
    return true;
}
 
// This function will be called when the app is inactive. When comes a phone call,it's be invoked too
void AppDelegate::applicationDidEnterBackground()
{
    //暂停动画
    CAApplication::getApplication()->stopAnimation();
     
    // if you use SimpleAudioEngine, it must be pause
     
    //暂停音效，如果你有使用音效，希望程序切到后台音效停止，请解下面代码的注释
    
    // SimpleAudioEngine::sharedEngine()->pauseBackgroundMusic();
}
 
// this function will be called when the app is active again
void AppDelegate::applicationWillEnterForeground()
{
    //回复动画
    CAApplication::getApplication()->startAnimation();
     
    // if you use SimpleAudioEngine, it must resume here
     
    //回复音效，如果你有使用音效，希望程序切到激活状态音效恢复，请解下面代码的注释
    
    // SimpleAudioEngine::sharedEngine()->resumeBackgroundMusic();
}

RootWindow is simple, I don't want to go into detail here, I'll take a look at what FirstViewController has done.
Start by opening the FirstViewController.h file

//加载函数 一般做初始化UI和逻辑
void viewDidLoad();
//卸载函数 一般做移除和释放
void viewDidUnload();

Take a look at FirstView .cpp's vievDidLoad (); Code in:

void FirstViewController::viewDidLoad()
{
    // Do any additional setup after loading the view from its nib.
    DRect winRect = this->getView()->getBounds(); //获得屏幕的Bounds（Bounds不收缩放影响）
     
    //加载一张图片
    CAImageView* imageView = CAImageView::createWithImage(CAImage::create("HelloWorld.png"));
     
    //设置图片的Frame显示大小(Frame的值缩放后会被改变)
    imageView->setFrame(winRect);
     
    //将图片添加的到屏幕上面（如果不添加，那么这个ui将不会被渲染，内存也会在下一个loop时被释放）
    this->getView()->addSubview(imageView);
     
    //设置一个文本
    CALabel* label = CALabel::createWithCenter(DRect(winRect.size.width*0.5, winRect.size.height*0.5-270, winRect.size.width, 200));
     
    //文本水平方向中间对其
    label->setTextAlignment(CATextAlignmentCenter);
      
    //文本竖直方向中间对其
    label->setVerticalTextAlignmet(CAVerticalTextAlignmentCenter);
     
    //设置字体大小（CROSSAPP_ADPTATION_RATIO是用于适配的系数）
    label->setFontSize(72 * CROSSAPP_ADPTATION_RATIO);
     
    //设置文本内容
    label->setText("Hello World!");
     
    //设置文本颜色
    label->setColor(CAColor_white);
     
    //添加到屏幕并设置z轴
    this->getView()->insertSubview(label, 1);
}