cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   demetriusb
   Member

   I need some help. All I want to do is have a button turn a sprite on / off.
   I was trying to use the MenuTest, but am unsure how to proceed.
   Here's what I'm using:

   #import "MainMenu.h"
   #import "One.h"
   
   @implementation MainMenu
   
   +(id) scene {
   
   	// 'scene' is an autorelease object.
   	CCScene *scene = [CCScene node];
   
   	// 'layer' is an autorelease object.
   	MainMenu *layer = [MainMenu node];
   
   	// add layer as a child to scene
   	[scene addChild: layer];
   
   	// return the scene
   	return scene;
   }
   
   - (id) init {
       self = [super init];
       if (self != nil) {
   
   		CCMenuItemImage *next = [CCMenuItemImage itemFromNormalImage:@"right.png" selectedImage:@"left.png" target:self selector:@selector(nextCallback:)];
   		CCMenuItemImage *previous = [CCMenuItemImage itemFromNormalImage:@"left.png" selectedImage:@"right.png" target:self selector:@selector(previousCallback:)];
   		CCMenu *menu = [CCMenu menuWithItems:next, nil];
   		CCMenu *menu2 = [CCMenu menuWithItems:previous, nil];
   
   		menu.position = ccp(728,65);
   		menu2.position = ccp(40,65);
   
   		//[menu alignItemsHorizontally];
   		[self addChild: menu z:2];
   		[self addChild: menu2 z:2];
   
   		CCSprite *menuback = [CCSprite spriteWithFile:@"oneBack.png"];
   		menuback.position = ccp(384,512);
   		[self addChild: menuback z:-1];
   
   		CCSprite *orangebar = [CCSprite spriteWithFile:@"oneFront.png"];
   		orangebar.position = ccp(384,512);
   		[self addChild: orangebar z:0];
   
   		// Label Item (LabelAtlas)
   		CCLabelAtlas *labelAtlas = [CCSprite spriteWithFile:@"orange.png"];
   		CCMenuItemLabel *item3 = [CCMenuItemLabel itemWithLabel:labelAtlas target:self selector:@selector(menuCallbackDisabled:)];
   		//item3.disabledColor = ccc3(0,0,0);
   		//item3.color = ccc3(200,200,255);
   
   		disabledItem = [item3 retain];
   		disabledItem.isEnabled = NO;
   
   		CCMenu *menu3 = [CCMenu menuWithItems:item3, nil];
   		menu3.position = ccp(140,165);
   		[self addChild: menu3 z:2];
   
       }
       return self;
   }
   
   -(void)nextCallback: (id)sender {
   	CCScene *one = [One node];
   	[[CCDirector sharedDirector] replaceScene: [CCSlideInRTransition transitionWithDuration:0.5 scene:one]];
   }
   
   -(void) menuCallbackDisabled:(id) sender {
   }
   
   -(void) menuCallbackEnable:(id) sender {
   	disabledItem.isEnabled = ~disabledItem.isEnabled;
   }
   
   - (void) dealloc
   {
   	[MainMenu release];
   	[disabledItem release];
   	[super dealloc];
   
   	[[CCTextureCache sharedTextureCache] removeUnusedTextures];
   }
   
   @end

   Please Help. This is one of the last things that I need to do to finish my project.

   Demetrius

   Posted 1 year ago #
2. 

   demetriusb
   Member

   OK Here's the Correct Code that doesn't crash:

   @implementation MainMenu
   
   +(id) scene {
   
   	// 'scene' is an autorelease object.
   	CCScene *scene = [CCScene node];
   
   	// 'layer' is an autorelease object.
   	MainMenu *layer = [MainMenu node];
   
   	// add layer as a child to scene
   	[scene addChild: layer];
   
   	// return the scene
   	return scene;
   }
   
   - (id) init {
       self = [super init];
       if (self != nil) {
   
   		CCMenuItemImage *next = [CCMenuItemImage itemFromNormalImage:@"right.png" selectedImage:@"left.png" target:self selector:@selector(nextCallback:)];
   		CCMenuItemImage *previous = [CCMenuItemImage itemFromNormalImage:@"left.png" selectedImage:@"right.png" target:self selector:@selector(menuCallbackEnable:)];
   		CCMenu *menu = [CCMenu menuWithItems:next, nil];
   		CCMenu *menu2 = [CCMenu menuWithItems:previous, nil];
   
   		menu.position = ccp(728,65);
   		menu2.position = ccp(40,65);
   
   		//[menu alignItemsHorizontally];
   		[self addChild: menu z:2];
   		[self addChild: menu2 z:2];
   
   		CCSprite *menuback = [CCSprite spriteWithFile:@"oneBack.png"];
   		menuback.position = ccp(384,512);
   		[self addChild: menuback z:-1];
   
   		CCSprite *orangebar = [CCSprite spriteWithFile:@"oneFront.png"];
   		orangebar.position = ccp(384,512);
   		[self addChild: orangebar z:0];
   
   		// Label Item (LabelAtlas)
   		CCLabelAtlas *labelAtlas = [CCSprite spriteWithFile:@"orange.png"];
   		CCMenuItemLabel *item3 = [CCMenuItemLabel itemWithLabel:labelAtlas target:self selector:@selector(menuCallbackDisabled:)];
   		//item3.disabledColor = ccc3(0,0,0);
   		//item3.color = ccc3(200,200,255);
   
   		disabledItem = [item3 retain];
   		disabledItem.isEnabled = NO;
   
   		CCMenu *menu3 = [CCMenu menuWithItems:item3, nil];
   		menu3.position = ccp(140,165);
   		[self addChild: menu3 z:2];
   
       }
       return self;
   }
   
   -(void)nextCallback: (id)sender {
   	CCScene *one = [One node];
   	[[CCDirector sharedDirector] replaceScene: [CCSlideInRTransition transitionWithDuration:0.5 scene:one]];
   }
   
   -(void) menuCallback:(id) sender {
   
   }
   -(void) menuCallbackDisabled:(id) sender {
   
   }
   
   -(void) menuCallbackEnable:(id) sender {
   	disabledItem.isEnabled = ~disabledItem.isEnabled;
   }
   
   - (void) dealloc
   {
   	[MainMenu release];
   	[disabledItem release];
   	[super dealloc];
   
   	[[CCTextureCache sharedTextureCache] removeUnusedTextures];
   }
   
   @end

   The only problem is that the "orange.png" is not turned off completely. It's darker than the "turned on" version. I tried using a color and it didn't look right.

   Any help on turning this off would be greatly appreciated.

   Demetrius

   Posted 1 year ago #
3. 

   Questor
   Member

   Demetrius,

   Not sure exactly what you mean by "not turned off completely"...but if you want the orange.png sprite to be invisible, you could try:
   [orangebar setVisible:false];
   or
   orangebar.visible=false;

   Regards,
   Q

   Posted 1 year ago #

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