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SonnyBurnette
Member
I have a few methods in my subclassed Sprite class that I call from my gamelayer. The problem is below each call I get a warning like the following: "Warning: 'Sprite' may not respond to '-yourMethod'"
Does anyone know how I can get these to clear up? Should I just ignore these?
1) Please post at least a bit of code.. context is important :)
That being said.. you're probably passing a Sprite * reference, in
which case you'll need to.. well.. I can't remember the correct term
for it right now:
mGameSprite = [SpriteExtensionClass spriteWithImage: @"myImg.png"];
-(Sprite *) getASprite
{
if (myLogic == true)
return mGameSprite;
}
-(void) doSomethingToASprite
{
SpriteExtensionClass *mSprite = (SpriteExtensionClass *) [self getASprite];
[mSprite doSomethingThatTheExtensionClassDoes];
}
Can someone else chime in with the correct terminology? It might be
known as operator overloading.
Chris.
On Mon, Jun 22, 2009 at 6:32 PM, <cocos2d-iphone-discuss@gamesforfood.cl> wrote:
> sonnyburnette says:
>
> I have a few methods in my subclassed Sprite class that I call from my
> gamelayer. The problem is below each call I get a warning like the
> following: "Warning: 'Sprite' may not respond to '-yourMethod'"
>
> Does anyone know how I can get these to clear up? Should I just ignore
> these?
>
> Read the whole thread.
SonnyBurnette
Member
Sorry about the late reply, I got tied up.
Here is a condensed version of my GameLayer
GameLayer.h
@interface GameLayer : Layer {
Sprite *hero;
}
@property (nonatomic,retain) Sprite *hero;
GameLayer.m
@implementation GameLayer
@synthesize hero
-(id) init {
CharacterSprite *sprite = [[CharacterSprite alloc] init];
self.hero = sprite;
[sprite release];
[hero setPosition: ccp(250, kReadyLevel)];
[self addChild:hero z:2];
}
-(void) dropHero {
heroDropRate = kNormalDropRate;
[hero showFalling];
}
Codemattic
Moderator
'@interface GameLayer : Layer {
CharacterSprite *hero;
}
@property (nonatomic,retain) CharacterSprite *hero;'
and you need to learn how to create an -init method. First calling the super initializer, and end by returning self:
'-(id) init
{
if( ! [super init] )
return nil;
self.hero = [[CharacterSprite alloc] init];
[hero setPosition: ccp(250, kReadyLevel)];
[self addChild:hero z:2];
return self;
}'
that goes for the -init for your CharacterSprite class also.
hth, Codemattic
Codemattic
Moderator
craps - I didnt use the backtick. try again:
@interface GameLayer : Layer {
CharacterSprite *hero;
}and
-(id) init
{
if( ! [super init] )
return nil;
self.hero = [[CharacterSprite alloc] init];
[hero setPosition: ccp(250, kReadyLevel)];
[self addChild:hero z:2];
return self;
}
Codemattic
Moderator
"Can someone else chime in with the correct terminology? It might be
known as operator overloading."
Objective C doesnt have operator overloading... maybe you mean casting? When you put a type in parens so the compiler considers the variable following it to be that type, from your example:
SpriteExtensionClass *mSprite = (SpriteExtensionClass *) [self getASprite];
SonnyBurnette
Member
Awesome response. I actually had "if(![super init])" and "return self" but was trying to give the short version. I guess it doesn't help shortening when we are bug chasing. I also found that in my CharacterSprite I had forgotten to put -(void)mymethod in the .h
The part that really helped was using "self.hero = [[CharacterSprite alloc] init];" instead of that long piece I had.
Thanks for the reply.
yep casting, thanks :P
On Mon, Jun 22, 2009 at 10:19 PM,
<cocos2d-iphone-discuss@gamesforfood.cl> wrote:
> codemattic says:
>
> "Can someone else chime in with the correct terminology? It might be
> known as operator overloading."
>
> Objective C doesnt have operator overloading... maybe you mean casting? When
> you put a type in parens so the compiler considers the variable following it
> to be that type, from your example:
>
> SpriteExtensionClass *mSprite = (SpriteExtensionClass *) [self getASprite];
>
> Read the whole thread.
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