Parse the overall framework and Startup Process of the Cocos2d Project

Cocos2dThe overall framework and startup process of the project are described in this article. Here we create a project named "Test2d ".XcodeThe file structure shown in Group & Files in is as follows:

Cocos2dSources: storesCocos2dSource code

Classes: stores the source code of this application.

Other Sources: main function of the program entry

Resources: stores images, icons, and sound files of the project.

Frameworks: Framework, followed by the START process

Enter from the main function:

 
 

  
  
#import <UIKit/UIKit.h>    
  
  
     
  
  
 int main(int argc, char *argv[]) {    
  
  
     NSAutoreleasePool *pool = [NSAutoreleasePool new];    
  
  
    int retVal = UIApplicationMain(argc, argv, nil, @"Test2dAppDelegate");    
  
  
     [pool release];    
  
  
     return retVal;    
  
  
 }　 
 
 

The row 5th mark passes control of the program to the application proxy objects Test2dAppDelegate and Test2dAppDelegate.

 
 

  
  
Test2dAppDelegate <SPAN style = "FONT-SIZE: 14px; LINE-HEIGHT: 21px; FONT-FAMILY: verdana, 'courier new'; WHITE-SPACE: normal "> the header file is as follows </SPAN>
  
  
# Import <UIKit/UIKit. h>
  
  

  
  
@ Interface Test2dAppDelegate: NSObject <UIApplicationDelegate> {
  
  
UIWindow * window;
  
  
}
  
  
@ Property (nonatomic, retain) UIWindow * window;
  
  
@ End
 
 

The third line shows that Test2dAppDelegate implements the system-defined application interface UIApplicationDelegate.

Various system events to be handled by the current application:

Give up control: applicationWillResignActive quit

Get control: applicationDidBecomeActive role

Memory alert: applicationDidReceiveMemoryWarning alert

Application exit prompt: applicationWillTerminate quit

System time change: applicationSignificantTimeChange

 
 

  
  
// Give up control
  
  
(Void) applicationWillResignActive :( UIApplication *) application {
  
  
[[CCDirector shareddire] pause];
  
  

  
  

  
  
// Obtain control
  
  
Void) applicationDidBecomeActive :( UIApplication *) application {
  
  
[[CCDirector shareddire] resume];
  
  
}
  
  

  
  
// Memory alarm
  
  
(Void) applicationDidReceiveMemoryWarning :( UIApplication *) application {
  
  
[[CCDirector shareddire] purgeCachedData];
  
  
 
  
  

  
  
//
  
  
(Void) applicationDidEnterBackground :( UIApplication *) application {
  
  
[[CCDirector shareddire] stopAnimation];
  
  
}
  
  
//
  
  
Void) applicationWillEnterForeground :( UIApplication *) application {
  
  
[[CCDirector shareddire] startAnimation];
  
  
}
  
  
// Program exit prompt
  
  
(Void) applicationWillTerminate :( UIApplication *) application {
  
  
[[CCDirector shareddire] end];
  
  

  
  

  
  
// System time change
  
  
(Void) applicationSignificantTimeChange :( UIApplication *) application {
  
  
[[CCDirector sharedDirector] setNextDeltaTimeZero: YES];
  
  
}
 
 

After the restore process is completed, the control of the program is passed toCocos2D-IPhoneClass Library,Cocos2D-IPhoneNext we will prepare for the main screen of the startup game:

1. The main window object (handle) is saved by the member window.

2. SetCocos2D-IPhoneIs bound to the "director" object.

3. Set the basic attributes of the "director" object.

 
 

  
  
(Void) applicationDidFinishLaunching :( UIApplication *) application
  
  
{
  
  
// CC_DIRECTOR_INIT ()
  
  
//
  
  
// 1. Initializes an EAGLView with 0-bit depth format, and RGB565 render buffer
  
  
// 2. EAGLView multiple touches: disabled
  
  
// 3. creates a UIWindow, and assign it to the "window" var (it must already be declared)
  
  
// 4. Parents EAGLView to the newly created window
  
  
// 5. Creates Display Link Director
  
  
// 5a. If it fails, it will use an NSTimer ctor
  
  
// 6. It will try to run at 60 FPS
  
  
// 7. Display FPS: NO
  
  
// 8. Device orientation: Portrait
  
  
// 9. Connects the director to the EAGLView
  
  
//
  
  
CC_DIRECTOR_INIT ();
  
  
// Obtain the shared director in order...
  
  
CCDirector * director = [CCDirector shareddire];
  
  
/*********** Set the basic attributes of the "director" Object ***************/
  
  
// Set the direction of the main window to vertical or horizontal)
  
  
// Sets landscape mode
  
  
[Director setDeviceOrientation: kCCDeviceOrientationLandscapeLeft];
 
 

 
 

  
  
// Whether to display FPS display frames per second)
  
  
// Turn on display FPS
  
  
[Director setDisplayFPS: YES];
  
  
// Set the relationship between the Director object and the current window to facilitate Director's operation on the Main Window
  
  
// Turn on multiple touches
  
  
EAGLView * view = [director openGLView];
  
  
[View setMultipleTouchEnabled: YES];
  
  
// Set the color palette width of the image displayed in the main window <BR> // Default texture format for PNG/BMP/TIFF/JPEG/GIF images
  
  
// It can be RGBA8888, RGBA4444, RGB5_A1, RGB565
  
  
// You can change anytime.
  
  
[CCTexture2D setDefaultAlphaPixelFormat: kTexture2DPixelFormat_RGBA8888];
  
  
// The scenario where the Director object starts and runs
  
  
[[CCDirector shareddire] runWithScene: [HelloWorld scene];
 
 

Main image object for Cocos2d-iPhone-HellowWorldScene scenario

After the scene object HellowWorldScence obtains control, it initializes the Worker Number init to directly create a Lable with "Hello world" content in the main screen. Place the tag in the center of the screen.

 
 

  
  
(id) init    
  
  
 {    
  
  
    // always call "super" init    
  
  
    // Apple recommends to re-assign "self" with the "super" return value    
  
  
     if( (self=[super init] )) {                
  
  
         // create and initialize a Label    
  
  
        CCLabel* label = [CCLabel labelWithString:@"Hello World" fontName:@"Marker Felt" fontSize:64];    
  
  
         // ask director the the window size    
  
  
         CGSize size = [[CCDirector sharedDirector] winSize];    
  
  
          
  
  
        // position the label on the center of the screen    
  
  
         label.position =  ccp( size.width /2 , size.height/2 );                
  
  
         // add the label as a child to this Layer    
  
  
         [self addChild: label];    
  
  
     }    
  
  
     return self;    
  
  
 }  
 
 

Cocos2D-The basic iPhone import framework is to ensure that the number of main items calls the correct application proxy object.

In the applicationDidFinishLaunching threshold of the application proxy object:

Create "layer" Object

Pass the layer to the newly created "scenario"

Use the scenario object created by the director "object running.

Summary: AnalysisCocos2dThe overall framework and startup process of the project have been introduced. I hope this article will help you!