Cocos2d notes (2) analyze the overall framework and Startup Process of the cocos2d Project

Here we create a project named "test2d". The file structure shown in Group & files in xcode is as follows:

Cocos2d sources: stores cocos2dSource code

Classes: stores the applicationProgramSourceCode

Other sources: main function of the program entry

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

Frameworks: Framework

 

Next step

Enter from the main function:

 

 
# Import <uikit/uikit. h> int main (INT argc, char * argv []) {ngutoreleasepool * Pool = [ngutoreleasepool new]; int retval = uiapplicationmain (argc, argv, nil, @ "test2dappdelegate"); [pool release]; return retval ;}
 

The 5th line mark passes control of the program to the application proxy objectTest2dappdelegate

 

 

Test2dappdelegate

 
Test2dappdelegateThe header file is as follows:
 

 

 
# Import <uikit/uikit. h> @ interface test2dappdelegate: nsobject <uiapplicationdelegate> {uiwindow * window;} @ property (nonatomic, retain) uiwindow * window; @ end
 

The third line showsTest2dappdelegateImplemented the application interface defined by the SystemUiapplicationdelegate

 

Various system events to be handled by the current application:

Give up control: applicationwillresignactive Get control: applicationdidbecomeactive Memory alert: applicationdidreceivememorywarning Application exit prompt: applicationwillterminate System time change: applicationsignificanttimechange

 

// Discard control-(void) applicationwillresignactive :( uiapplication *) Application {[ccdirector shareddirector] pause];} // obtain control-(void) applicationdidbecomeactive :( uiapplication *) application {[[ccdirector shareddire] Resume];} // memory alarm-(void) applicationdidreceivememorywarning :( uiapplication *) Application {[[ccdirector shareddire] purgecacheddata];} //-(void) applicationdidenterbackground :( uiapplication *) Application {[ccdirector shareddirector] stopanimation];} //-(void) applicationwillenterforeground :( uiapplication *) application {[[ccdirector shareddire] startanimation];} // The program exit prompt-(void) applicationwillterminate :( uiapplication *) Application {[[ccdirector shareddire] end];} // system time change-(void) applicationsignificanttimechange :( uiapplication *) Application {[ccdirector shareddire] setnextdeltatimezero: Yes];}
 

 

The number of shardsApplicationdidfinishlaunchingSetThe control of the program is passed to the Cocos2D-iPhone class library, and the Cocos2D-iPhone begins to prepare for the startup game main screen:

1. The main window object (handle) is saved by the member window.
2. Bind The "director" Object of the Cocos2D-iPhone to it.
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 main window direction (vertical or horizontal) 
 // sets Landscape mode 
 [Director setdeviceorientation: kccdeviceorientationlandscapeleft]; 

// Whether to display FPS (number of 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 toucheseaglview * view = [Director openglview]; [view setmultipletouchenabled: Yes]; // set the color palette width of the image displayed in the Main Window
// 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]; // scenario where the Director object starts and runs [[ccdirector shareddire] runwithscene: [helloworld scene];}
 

 

Cocos2d-iPhoneMain image object-HellowworldsceneScenario

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 valueif (Self = [Super init]) {// create and initialize a labelcclabel * label = [cclabel labelwithstring: @ "Hello World" fontname: @ "marker felt" fontsize: 64]; // ask ctor the window sizecgsize size = [[ccdirector shareddire] winsize]; // position the label on the center of the screenlabel. position = CCP (size. width/2, size. height/2); // Add the label as a child to this layer [self addchild: Label];} return self ;}
 

 

The basic import framework of the Cocos2D-iPhone is:

 1) Make sure that the number of main objects calls the correct application proxy object.

2) In the applicationdidfinishlaunching threshold of the application proxy object

A) create a "layer" object. B) Pass the layer to the newly created "scenario" c) run the newly created "scenario" object through the "director.