Sprite not drawing/appearing on screen, Cocos2d - cocos2d-iphone

Question

I'v got trouble getting my sprite to appear on screen using my current method. I got multiple sprites on the screen already, but I'v added this new one in a different manner as I'm going to manipulate it later on (handling different interactions and such). But I don't see why it doesn't appear on the screen when I run the program. I'v tried changing the z order without luck, but that might be because the sprite wasn't added in the init method like the others so the z order doesn't affect it in comparison to the background and such created in the init method. Anyways, got any clue for why it won't draw on screen?
- (void) addMonster {
CCSprite * monster = [CCSprite spriteWithImageNamed:#"Ghost.png"];
// Determine where to spawn the monster along the Y axis
CGSize viewSize = [CCDirector sharedDirector].viewSize;
int minY = monster.contentSize.height / 2;
int maxY = viewSize.height - monster.contentSize.height/2;
int rangeY = maxY - minY;
int actualY = (arc4random() % rangeY) + minY;
// Create the monster slightly off-screen along the right edge,
// and along a random position along the Y axis as calculated above
monster.position = ccp(viewSize.width + monster.contentSize.width/2, actualY);
[self addChild:monster];
// Determine speed of the monster
int minDuration = 2.0;
int maxDuration = 4.0;
int rangeDuration = maxDuration - minDuration;
int actualDuration = (arc4random() % rangeDuration) + minDuration;
// Create the actions
CCActionMoveTo * actionMove = [CCActionMoveTo actionWithDuration:actualDuration
position:ccp(-monster.contentSize.width/2, actualY)];
CCActionCallBlock * actionMoveDone = [CCActionCallBlock actionWithBlock:^(CCNode *node) {
[monster removeFromParentAndCleanup:YES];
}];
[monster runAction:[CCActionSequence actions:actionMove, actionMoveDone, nil]];
}
//The call back function
-(void)gameLogic:(CCTime)dt {
[self addMonster];
}
- (id)init{
// Apple recommend assigning self with supers return value
self = [super init];
if (!self) return(nil);
if( (self = [super init]) ) {
self.userInteractionEnabled = YES;
//How often a new ghost gets produced
[self schedule:#selector(gameLogic:) interval:1.0];
//And some more code none relevant to this keeps going...

Answer 1

I am having the same problem.
The sprites i add do appear, but when i leave the scene and come back, they won't appear. As far as i know sprites needs to be added in the init method. When you add them at a later stage (in my case) they appear only once.
I am still looking for a solution to add the sprites at a later stage than the init method and appears more than once.
Maybe this answer helps you finding a solution.