63 days before the last day of my job

So time is flying but I am still stuck at the first tutorial because I cannot proceed if I cannot understand the code, just doing copy paste is not helping much

so my today goal is try to understand what the meaning of each of the complicated file

there is a helloworld.h and helloworld.m

the .h seem like is declare what is the classes and .m contain all the method and function

but i still cannot understand how the entire stuff running

on my helloworld.h i have 2 interface
===========================

@interface helloworld:CCColorLayer

@interface HelloworldScene: CCScene

( I am just guessing we need a scene, inside the scene we have a layer)

on my helloworld.m i have 2 implementation with 10 function
===========================================
@implementation HelloworldScene
-(id)init
-(void)dealloc

(I am guessing one is for initialize and one is for deallocate memory)

@implementation HelloWorld
-(void)spriteMoveFinished:(id)sender
-(void)addTarget
-(void)gameLogic:(ccTime)dt
-(id)init
-(void)update:(ccTime)dt
-(void)pauseGame
-(void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
-(void)dealloc

(this one complicate out of me, there are 8 method inside the implementation of hello world, but which one of the method is the timer? i am guessing is the update???? let me check the code inside)

ok, after 2 minutes of reading,

i found inside the -(id)init there is 2 line of scheduling code

// Call game logic about every second

[self schedule:@selector(gameLogic:) interval:1.0];

[self schedule:@selector(update:)];

i guess this is the way it run the timer, every single second it will call the method "gamelogic and also "update"

the (void)gameLogic will calling the (void)addTarget every single second, and (void)addTarget will create an enemy every single second by first declaring the

CCSprite *target = [CCSprite spriteWithFile:@"Target.png" rect:CGRectMake(0, 0, 27, 40)]; 

target.position = ccp(winSize.width + (target.contentSize.width/2), actualY);

[self addChild:target];

notice all this SELF stuff is very confusing i guess you need to memorize them


inside the (void)update there are 4 for loop i guess is to loop through all the stuff every single second
for (CCSprite *projectile in _projectiles) {

              for (CCSprite *target in _targets) {}
}

for (CCSprite *target in targetsToDelete) {}

for (CCSprite *projectile in projectilesToDelete) {}




But I cannot found the code part of enemy movement and projectile movement inside the (void)update method i guess the code must be somewhere

after 2 minute of searching, i found this two code inside the (void)addTarget and (void)ccTouchesEnded

// Create the actions

id actionMove = [CCMoveTo actionWithDuration:actualDuration position:ccp(-target.contentSize.width/2, actualY)];

id actionMoveDone = [CCCallFuncN actionWithTarget:self selector:@selector(spriteMoveFinished:)];

[target runAction:[CCSequence actions:actionMove, actionMoveDone, nil]];

// Move projectile to actual endpoint

[projectile runAction:[CCSequence actions:

  [CCMoveTo actionWithDuration:realMoveDuration position:realDest],

  [CCCallFuncN actionWithTarget:self selector:@selector(spriteMoveFinished:)],

  nil]];

Seem like the object CCSprite have its own runAction which will move auto once you set it

ok


So it only mean one thing, the (void)update is only used as a collision detection


first it loop the projectile, for each projectile it check is it collide with the target, if yes, remove both the projectile and the target


ok, i can understand 80% to 90% now, so can move along to the next tutorial