cocos2d for iPhone

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

1. 

   Billy Lavoie
   Member

   I have a menu with 20 items (from 1 to 20) and each menu item is a "button", all 20 have the same selector now my problem is that I don't know how to figure out which button was pressed using the sender variable. I tried to access the variable "selectedIndex" (which seems to hold the value I want) but I can't seem to be able to.

   Anyone has a suggestion?

   Posted 2 years ago #
2. 

   ob1
   Member

   You can set a "tag" for each one using the tag property.

   Posted 2 years ago #
3. 

   Billy Lavoie
   Member

   Thanks, I'll give that a try. Sounds like exactly what I need.

   Posted 2 years ago #
4. 

   IronMike
   Member

   @ob1 - can you tell me why [sender tag] is always -1 for me? I set the tag properly and can even manipulate the button using getChildByTag. But I can't determine which button is pressed because they all send -1 as the tag.

   Posted 1 year ago #
5. 

   joker
   Member

   Perhaps you could post the code you're using, that doesn't work?

   Posted 1 year ago #
6. 

   IronMike
   Member

   -(id) init {
   	if( (self=[super init] )) {
   
   Button2 = [CCMenuItemImage
   			   itemFromNormalImage:@"but_patterns_selection.png"
   			   selectedImage: @"but_patterns_selection_sel.png"
   			   target:self selector:@selector(displayPattern:)];
   		PatternButton = [CCMenu menuWithItems: Button2, nil];
   		PatternButton.position = ccp(pbX, pbY);
   		[self addChild:PatternButton z:2 tag:1001];
   
   	}
   	return self;
   }
   
   -(void) displayPattern:(int)sender {
   NSLog(@"tag = %i",[sender tag]);
         if([sender tag] == 1001){
   		NSLog(@"button 1 pressed");
   	}
   }

   Posted 1 year ago #
7. 

   joker
   Member

   I'm guessing the problem is because you are assigning the tag to the menu as a whole and not to the individual button?

   The button is Button2, PatternButton gets a tag of 1001 but is the menu that Button2 belongs to.

   Can you try:
   

   Button2.tag = 1001;

   Posted 1 year ago #
8. 

   IronMike
   Member

   Joker,

   That worked! Thanks so much for the reply.

   However, I now have a new problem. I am creating the buttons in a for loop like this

   int pbX = 30;
   int pbY = 379;
   int z=1001;
   
   for(int y=0;y<8;y++){
   
       for(int x=0;x<6;x++){
               Button2 = [CCMenuItemImage
   				  itemFromNormalImage:@"but_patterns_selection.png"
   				  selectedImage: @"but_patterns_selection_sel.png"
   				  target:self selector:@selector(displayPattern:)];
               PatternButton = [CCMenu menuWithItems: Button2, nil];
               PatternButton.position = ccp(pbX, pbY);
               Button2.tag = z;
   	[self addChild:PatternButton z:2];
   
           pbX = pbX+52;
           z++;
       }
   
    pbY = pbY-49;
    pbX = 30;
   
   }

   This creates a grid of buttons in rows and columns. As long as I can set a tag for each button it would work fine to name them all Button2. But now that I am tagging button 2 I need to increment it to: Button2, Button3, Button4....

   How do i append my variable z to my variable?

   CCMenuItem *[NSString stringWithFormat:@"Button%i",z] = ....................

   Posted 1 year ago #
9. 

   IronMike
   Member

   I take it back. I don't need to increment the variable. It works fine as it is coded.

   THanks again for your help. My hair can stay in my head now.

   Posted 1 year ago #

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