Restarting game/scene from another layer - ios

Question

I’m having a real headache trying to diagnose this problem for quiet awhile now.
Details:
I have the following nodes:
GameLayer; the main game layer, also a semi-singleton.
HUDLayer; a simple HUD layer (for score and pause button), added to the scene along with GameLayer of course.
PauseLayer; a CCLayerColor subclass which holds a simple menu (resume, restart, and main menu).
The PauseLayer is added to the GameLayer as a child whenever the pause button is pressed.
Problem:
Restarting the game/scene works fine by: [self restartGame] from within GameLayer itself.
But invoking the same method from PauseLayer by using: [[GameLayer sharedGameLayer] restartGame] does not completely replace the GameLayer scene with a new instance; old scene is still there with no childs, same old score, etc, albeit GameLayer’s dealloc is being called (Only if no transition is used).
Code:
GameLayer
static GameLayer *sharedGameLayer;
#implementation GameLayer
- (id)init
{
// always call "super" init
// Apple recommends to re-assign "self" with the "super's" return value
if(self = [super initWithColor:ccc4(255, 255, 255, 255) width:[CCDirector sharedDirector].winSize.width height:[CCDirector sharedDirector].winSize.height])
{
NSLog(#"%s", __PRETTY_FUNCTION__);
sharedGameLayer = self;
.
.
}
+ (GameLayer *)sharedGameLayer {
#synchronized(self) {
if (sharedGameLayer == nil) {
sharedGameLayer = [[self alloc] init];
}
}
return sharedGameLayer;
}
- (void)pauseGame
{
NSLog(#"%s", __PRETTY_FUNCTION__);
if (![[CCDirector sharedDirector] isPaused])
{
// Disable the top menu.
self.hud.topMenu.enabled = NO;
// Pause game.
[[CCDirector sharedDirector] pause];
// Pause the background music.
[[SimpleAudioEngine sharedEngine] pauseBackgroundMusic];
// Disable touch detection.
[[CCDirector sharedDirector].touchDispatcher removeDelegate:self];
// Add the Pause Layer.
PauseLayer *pauseLayer = [[PauseLayer alloc] init];
pauseLayer.tag = 2;
pauseLayer.zOrder = 10;
[self addChild:pauseLayer z:10 tag:2];
}
}
- (void)restartGame
{
NSLog(#"%s", __PRETTY_FUNCTION__);
[[NSNotificationCenter defaultCenter] removeObserver:self];
[[CCDirector sharedDirector].touchDispatcher removeAllDelegates];
[self stopAllActions];
[self unscheduleAllSelectors];
[self unscheduleUpdate];
[self removeAllChildrenWithCleanup:YES];
[[CCDirector sharedDirector] replaceScene:[GameLayer scene]];
//[[CCDirector sharedDirector] replaceScene:[CCTransitionFade transitionWithDuration:1.0 scene:[GameLayer scene]]];
}
- (void)dealloc
{
NSLog(#"%s", __PRETTY_FUNCTION__);
sharedGameLayer = nil;
}
#end
PauseLayer
- (id)init
{
if (self = [super initWithColor:ccc4(0, 0, 0, 128) width:[CCDirector sharedDirector].winSize.width height:[CCDirector sharedDirector].winSize.height])
{
// Create a menu.
// Resume button.
CCLabelTTF *resumeLabel = [CCLabelTTF labelWithString:#"Resume" fontName:#"Marker Felt" fontSize:32];
resumeLabel.color = ccc3(240, 240, 240);
CCMenuItemLabel *resumeButton = [CCMenuItemLabel itemWithLabel:resumeLabel block:^(id sender) {
[[GameLayer sharedGameLayer] resumeGame];
}];
// Restart Game button.
CCLabelTTF *restartLabel = [CCLabelTTF labelWithString:#"Restart" fontName:#"Marker Felt" fontSize:32];
restartLabel.color = ccc3(240, 240, 240);
CCMenuItemLabel *restartButton = [CCMenuItemLabel itemWithLabel:restartLabel block:^(id sender) {
[[GameLayer sharedGameLayer] restartGame];
}];
// Main Menu button.
CCLabelTTF *mainMenuLabel = [CCLabelTTF labelWithString:#"Main Menu" fontName:#"Marker Felt" fontSize:32];
mainMenuLabel.color = ccc3(240, 240, 240);
CCMenuItemLabel *mainMenuButton = [CCMenuItemLabel itemWithLabel:mainMenuLabel block:^(id sender) {
[[GameLayer sharedGameLayer] gotoMainMenu];
}];
CCMenu *menu = [CCMenu menuWithItems:resumeButton, restartButton, mainMenuButton, nil];
[menu alignItemsVerticallyWithPadding:10.0];
menu.position = ccp([CCDirector sharedDirector].winSize.width / 2, [CCDirector sharedDirector].winSize.height / 2);
[self addChild:menu];
}
return self;
}
EDIT:
If I add the Pause layer (as a child to GameLayer, and always visible) in the GameLayer's init method, everything works perfectly.. which is a bit weird.
Any input is highly appreciated.
Thanks in advance!

Answer 1

from the line
static GameLayer *sharedGameLayer;
You needed to write this line before #implementation class line to make it isn't class member variable. and at sharedGameLayer method you should change it to
+ (GameLayer *)sharedGameLayer {
#synchronized(self) {
if (sharedGameLayer == nil) {
sharedGameLayer = [[self alloc] init];
}
}
return sharedGameLayer;
}
And, when you define game layer class you don't call init method but you should call sharedGameLayer to make game layer class be singleton.

Answer 2

I would not suggest using singleton pattern on CCLayers, however did you override / edit the CCScene wrapper so it doesn't call init.
For instance
+(id)scene
{
CCScene* scene = [CCScene node];
[scene addChild:[GameLayer sharedGameLayer]];
return scene;
}
Then when you call
[[CCDirector sharedDirector] replaceScene:[GameLayer scene]];
Remember to restart your game right after
[[GameLayer sharedInstance] restart];
Or you could do that in the scene wrapper method.
Hope I got your point.
Atleast this will save you from reallocating space for the game layer all the time hehe..

Answer 3

The culprit of the problem was calling the CCDirector's ReplaceScene: method after pausing the game using the CCDirector's Pause method. What I did was implementing my own "Pause" functionality mainly using: [self pauseSchedulerAndActions]; and also in my case: [[self.spidersBatchNode children] makeObjectsPerformSelector:#selector(pauseSchedulerAndActions)]; for all the children inside of the spriteBatchNode. Another problem arised for which I'll make another question.Thanks for all the replies.