cocos2d for iPhone

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

1. 

   alexgames
   Member

   I need to fit a text of any length to fixed area (i.e.200x300)
   If text is short then the font size would be big, if text is long then font size smaller.

   I use these methods to determine an approprieted font size:

   while(....)
   ----font = [UIFont fontWithName:fontName size:currentFontSize];
   ----realSize = [str sizeWithFont: font constrainedToSize:rect];

   Than I create a Label like this:

   [Label initWithString: str dimensions: rect ....]

   It works perfect, but I need to change the text in the area for many times,
   every time I must create a new Label. I can't use single Label and setString method, becuase font sizes is different.

   After 3-4 new Labels, FPS fall down, From 60 to 30 ftp. After new 4-5 labels to 20 fps, and goes to 0 quickly.

   I've tried to delete an old label before creating new one:

   label=nil;
   [label release];
   [[TextureMgr sharedTextureMgr] removeUnusedTextures];
   [[TextureMgr sharedTextureMgr] removeAllTextures];

   there is no effect.

   Please help! I'm gonna crazy with this...

   -I can't use BitmapFont because I need to scale it and for the small fonts it looks too bad.
   - I don't want to use UILabel directly becuase this is the text in the game.

   Thanks.

   Posted 2 years ago #
2. 

   arian487
   Member

   I know this is a hack solution but can't you just use labal.scale?

   Posted 2 years ago #
3. 

   adunsmoor
   Member

   Try reordering your code and let us know if that helps:

   [label release];
     label = nil;

   If you set the label to nil first then you are sending the "release" message to nil which won't do anything.

   Posted 2 years ago #
4. 

   alexgames
   Member

   arian487
   I should scale the created texture, right?
   I mean I will create a Label with large text to scale,
   so Label creates a texture, than I will scale it.

   It looks very bad, scaled texture with the text...

   adunsmoor

   I meant I used all of these methods wihtout any success,
   I guess that "label = nil;" is equel to "[label release];",

   nil is also set a pointer to nil, rather than just remove it.
   But nil firstly should release the memory also.

   Posted 2 years ago #
5. 

   Steve Oldmeadow
   Administrator

   "But nil firstly should release the memory also."

   No, you are wrong - this isn't Java. You clearly don't understand memory management on the iPhone and should pay attention to adunsmoor's advice.

   Posted 2 years ago #
6. 

   arian487
   Member

   doing label = nil is NOT the same thing as [label release]. It is my suggestion that the FIRST thing you do now is go read up on memory management and pointers in general. They are ESSENTIAL to learning and understanding C. While a very powerful tool, it is one of the more complex concepts to understand in CS, many think they know it, but haven't even scratched the surface.

   Once you learn it though, the sky is the limit. Pointers will be like that girlfriend you can't stand but also can't get enough of. Pointers are like candy. You love em and hate em at the same time. Seriously, read up on pointers and learn them BEFORE you do anything.

   If you want, I can give you some exercises to do in normal C that'll strengthen your knowledge of pointers.

   Posted 2 years ago #
7. 

   alexgames
   Member

   Yes, I was wrong. please don't kill me )
   I thougth that Obj-C can do this instead of C++ (like force autorelease or so),
   I was not sure, thanks for help.

   The problem was I forgot to "removeChild" my label each time )

   Thanks for all again!

   Posted 2 years ago #
8. 

   arian487
   Member

   I've never used C++ actually so does it actually free the memory when you do that?

   Posted 2 years ago #
9. 

   ob1
   Member

   What might be confusing people is that setting a "retain" property to nil will release it as in :

   self.label = nil;

   (And also the dot notation side of things).

   Posted 2 years ago #
10. 

    arian487
    Member

    Hmm...never knew that. Learn something new I guess.

    Posted 2 years ago #
11. 

    Mitch Lindgren
    Member

    @ob1: but just so everyone's clear, that's ONLY if you access it as a property. If you just do label = nil, that will NEVER release the label. It's gotta be self.label = nil - and again, this only works for properties which have been defined correctly.

    Posted 2 years ago #
12. 

    ob1
    Member

    @lindgrenM: Yes, good clarification.

    Posted 2 years ago #
13. 

    alexgames
    Member

    Yes, I read about this case exactly,
    thanks for the explanations guys!

    Posted 2 years ago #

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