Introduction to basic program framework and common actions of Cocos2d-iPhone V3 (1)

Introduction to basic program framework and common actions of Cocos2d-iPhone V3 (1)
Introduction to basic program framework and common actions of Cocos2d-iPhone V3 (1)

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• Part 1: a basic framework of Cocos2d-iPhone V3 1. AppDelegate

  First, seeAppDelegate.hClass is inherited fromCCAppDeleagate, Nothing special:

  #import cocos2d.h@interface AppDelegate : CCAppDelegate@end

  Check againAppDelegate.mYou only need to implement two functions.startSceneYou can simply load your custom scenario:

  #import AppDelegate.h#import MainScene.h@implementation AppDelegate-(BOOL)application:(UIApplication *)application    didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{    [self setupCocos2dWithOptions:@{        CCSetupShowDebugStats: @(YES),    }];    return YES;}- (CCScene *)startScene{    return [HomeScene scene];}

  2. Your own scenario class MainScene

  First lookMainScene.hWe can see there are two methods: one is static methodscene, One is the class Methodinit:

  #import cocos2d.h#import cocos2d-ui.h@interface MainScene : CCScene+ (MainScene *)scene;- (id)init;@end

  Let's take a look.MainScene.mThere are more headers here. First, let's look at the overall structure:

  #import MainScene.h@implementation MainScene{    CCSprite *_sprite;}+ (MainScene *)scene { /* ... */ }- (id)init { /* ... */ }- (void)dealloc { /* ... */ }- (void)onEnter { /* ... */ }- (void)onExit { /* ... */ }- (void)touchBegan:(UITouch *)touch withEvent:(UIEvent *)event { /* ... */ }@end

  You must have a static method to return a custom scenario instance.sceneMethod. Also haveonEnterAndonExitIndicates that it will be called when you enter/exit the scenario.touchBeganIs a Touch Handler.

  2.1. Static Methodscene

  Nothing to say:

  + (MainScene *)scene{    return [[self alloc] init];}

  2.2.init

  - (id)init{    // Apple recommend assigning self with supers return value    self = [super init];    if (!self) return(nil);    // Enable touch handling on scene node    self.userInteractionEnabled = YES;    // Create a colored background (Dark Grey)    CCNodeColor *background =        [CCNodeColor nodeWithColor:[CCColor colorWithRed:0.2f                                                   green:0.2f                                                    blue:0.2f                                                   alpha:1.0f]];    [self addChild:background];    // Add a sprite    _sprite = [CCSprite spriteWithImageNamed:@Icon-72.png];    _sprite.position  = ccp(self.contentSize.width/2,self.contentSize.height/2);    [self addChild:_sprite];    // Animate sprite with action    CCActionRotateBy* actionSpin = [CCActionRotateBy actionWithDuration:1.5f angle:360];    [_sprite runAction:[CCActionRepeatForever actionWithAction:actionSpin]];    // done    return self;}

  • CallsuperOfinit
  • SetuserInteractionEnabledIsYESTo receive touch events
  • Add a background node.CCNodeColor
  • Add a genie NodeCCSprite
  • Add actions to the genie NodeCCActionRotateBy
  • Returnself2.3. Handler:onEnter

    Remember to callsuperOfonEnter:

    - (void)onEnter{    [super onEnter];}

    2.4. exit scenario Handler:onExit

    Remember to callsuperOfonExit:

    - (void)onExit{    [super onExit];}

    2.5. Touch Handler

    - (void) touchBegan:(UITouch *)touch withEvent:(UIEvent *)event{    CGPoint touchLoc = [touch locationInNode:self];    CCActionMoveTo *actionMove =        [CCActionMoveTo actionWithDuration:1.0f position:touchLoc];    [_sprite runAction:actionMove];}

    • FirstUITouchParameter to obtain the Touch LocationCGPoint
    • Set according to the obtained locationCCActionAnd finally run thisCCActionPart 2: Action 1. DisplacementCCActionMoveBy

      + (id)actionWithDuration:(CCTime)duration position:(CGPoint)deltaPosition;

      2. ShiftCCActionMoveTo

      + (id)actionWithDuration:(CCTime)duration position:(CGPoint)position;

      3. Rotate an angleCCActionRotateBy

      Note that the angle is an angle (360 degrees a week), not a radian (2 π a week ):

      + (id)actionWithDuration:(CCTime)duration angle:(float)deltaAngle;

      4. RotateCCActionRotateTo

      Note that the angle is an angle (360 degrees a week), not a radian (2 π a week ):

      + (id)actionWithDuration:(CCTime)duration angle:(float)angle;

      5. Gradient appearanceCCActionFadeIn

      This action fades in the target, it modifies the opacity from 0 to 1.

      + (id)actionWithDuration:(CCTime)d;

      6. Gradient disappearsCCActionFadeOut

      This action fades out the target, it modifies the opacity from 1 to 0.

      + (id)actionWithDuration:(CCTime)d;

      7. GradientCCActionFadeTo

      You may notice spelling errors in the Cocos2d source code,opacityWrittenopactiy(CCActionInterval.hMedium ):

      /** *  Creates a fade action. * *  @param duration Action duration. *  @param opactiy  Opacity to fade to. * *  @return New fade action. */+ (id)actionWithDuration:(CCTime)duration opacity:(CGFloat)opactiy;

      -

      Reprinted please indicate from: http://blog.csdn.net/prevention