How to replace layers? - ios

Question

I started to learn Objective-C and use cocos2D about 1 month ago.
I want to replace three different layers by tapping buttons.
At first, I tried to use "CCLayerMultiplex." Then, use "if sentence." But then the layers just overlap or crash when the buttons are tapped. I want the previous layer to disappear when the new layer appears, but the old layer remains with my code now.
I think using "CCLayerMultiplex" is my best option, but I can't make it work as I want it to.
Below is my code. I'm afraid that there're some poor sentences...
#interface GSLayout : CCLayer {
// button items
CCMenuItemImage *file1;
CCMenuItemImage *file1Pushed;
...
// Layer (replace)
CCLayer *layer1;
CCLayer *layer2;
CCLayer *layer3;
// replace layers
CCLayerMultiplex* mpLayer;
}
#end
#implementation GSLayout
-(id) init{
if( (self=[super init])) {
CCLOG(#"%#: %#", NSStringFromSelector(_cmd), self);
self.isTouchEnabled = YES;
// buttons
file1 = [CCMenuItemImage itemFromNormalImage:#"Icon-Small-50.png"
selectedImage: #"Icon-Small.png"
target:nil
selector:nil];
file1Pushed = [CCMenuItemImage itemFromNormalImage:#"Icon-Small.png"
selectedImage:#"Icon-Small-50.png"
target:nil
selector:nil];
CCMenuItemToggle *toggleFile1 = [CCMenuItemToggle itemWithTarget:self
selector:#selector(selectOne:)
items:file1,file1Pushed, nil];
toggleFile1.anchorPoint = CGPointMake(0.5f, 0.5f);
file2 = [[CCMenuItemImage itemFromNormalImage:#"Icon-Small-50.png"
selectedImage: #"Icon-Small.png"
target:nil
selector:nil]retain];
file2Pushed = [[CCMenuItemImage itemFromNormalImage:#"Icon-Small.png"
selectedImage:#"Icon-Small-50.png"
target:nil
selector:nil]retain];
CCMenuItemToggle *toggleFile2 = [CCMenuItemToggle itemWithTarget:self
selector:#selector(selectTwo:)
items:file2,file2Pushed, nil];
toggleFile2.anchorPoint = CGPointMake(0.5f, 0.5f);
...
CCMenu *toggleMenu = [CCMenu menuWithItems:toggleFile1,toggleFile2,toggleFile3, nil];
[toggleMenu alignItemsHorizontally];
toggleMenu.anchorPoint = CGPointMake(0, 1.0f);
CGSize screenSize = [[CCDirector sharedDirector] winSize];
toggleMenu.position = CGPointMake(screenSize.width/2, screenSize.height);
[self addChild:toggleMenu];
// create layers
layer1 = [GameFile1 node];
layer2 = [GameFile2 node];
layer3 = [GameFile3 node];
mpLayer = [CCLayerMultiplex layerWithLayers:layer1,layer2,layer3, nil];
}
return self;
}
- (void) selectOne: (CCMenuItem*) menuItem
{
NSLog(#"The first menu was called");
if([layer1 isRunning])
{
nil;
NSLog(#"The layer1 is running");
} else if([layer2 isRunning]) {
[mpLayer switchTo:0];
NSLog(#"The layer2 was replaced");
}else if([layer3 isRunning]) {
[mpLayer switchTo:0];
NSLog(#"The layer3 was replaced");
} else{
[self addChild:layer1];
NSLog(#"The layer1 was called");
}
}
- (void) selectTwo: (CCMenuItem*) menuItem
{
NSLog(#"The second menu was called");
if([layer2 isRunning])
{
nil;
NSLog(#"The layer2 is running");
} else if([layer1 isRunning]) {
[mpLayer switchTo:1];
NSLog(#"The layer1 was replaced");
} else if([layer3 isRunning]) {
[mpLayer switchTo:1];
NSLog(#"The layer3 was replaced");
}else{
[self addChild:layer2];
NSLog(#"The layer2 was called");
}
}
- (void) selectThree: (CCMenuItem*) menuItem
{
NSLog(#"The third menu was called");
...
}
Please give me some advice!
Thank you in advance!
I'll add some codes.
#interface GameFile1 : CCLayer {
CCSprite* sprite;
}
#implementation GameFile1
-(id) init{
if( (self=[super init])) {
CGSize screenSize = [[CCDirector sharedDirector] winSize];
CCMenuItemImage *soundItem1 = [CCMenuItemImage itemFromNormalImage:#"button1.png"
selectedImage: #"Icon.png"
target:self
selector:#selector(doSomethingOne:)];
CCMenuItemImage *soundItem2 = [CCMenuItemImage itemFromNormalImage:#"button2.png"
selectedImage: #"Icon.png"
target:self
selector:#selector(doSomethingTwo:)];
...
CCMenu * myMenu = [CCMenu menuWithItems:soundItem1, soundItem2,soundItem3,soundItem4, soundItem5,soundItem6,soundItem7, soundItem8,soundItem9,soundItem10,soundItem11,soundItem12, nil];
[myMenu alignItemsInRows:[NSNumber numberWithInt:4],[NSNumber numberWithInt:4],[NSNumber numberWithInt:4] ,nil];
myMenu.position = CGPointMake(370, 120);
[self addChild:myMenu];
sprite = [CCSprite spriteWithFile:#"o0400026611355530621.jpg"];
sprite.scale = 0.5f;
sprite.position = CGPointMake(screenSize.width/2, screenSize.height/2);
sprite.anchorPoint = CGPointMake(1.0f, 0);
[self addChild:sprite];
- (void) doSomethingOne: (CCMenuItem *) menuItem
{
NSLog(#"The first menu was called");
[[SimpleAudioEngine sharedEngine] playEffect:#"one.wav"];
[sprite setTexture:[[CCTextureCache sharedTextureCache] addImage: #"one.jpg"]];
}
- (void) doSomethingTwo: (CCMenuItem *) menuItem
{
NSLog(#"The second menu was called");
[[SimpleAudioEngine sharedEngine] playEffect:#"two.wav"];
[sprite setTexture:[[CCTextureCache sharedTextureCache] addImage: #"one.jpg"]];
}
...
#end

Answer 1

Since you have already loaded the textures for all three layers, you might as well have all three sitting in separate CCLayers where two are hidden at any given state using a method similar to:
- (void) setLayer:(uint)show {
layerOne.visible = (show == 0);
layerTwo.visible = (show == 1);
layerThree.visible = (show == 2);
}