A fast, easy to use, free, and community supported 2D game engine
agfa555
Member
Hi,
I have a CCSprite subclass called Block.
I try to change my texture at runtime like this:
CCTexture2D *texture = [[CCTexture2D alloc] initWithImage:[UIImage imageNamed:file]]; //Here i call the texture
[powerBlock setTexture:texture]; //I set the texture to my block
[texture release];
The same code works with other textures.
Am I missing something???
Thank you!!!!!!!
Codemattic
Moderator
I dont see any problem, I do something similar (but also for 0.8.x, so it could be a 0.9x problem) - maybe the problem is in powerBlock itself? Could you show how to create/define/initialize that?
Also, its more helpful to say *specifically what* is going wrong as opposed to just saying it doesnt work. Does it crash? Does it display the texture incorrectly? Is it just blank? Etc...
SwizzerSweet
Member
just did this a while ago, my code to get it to work (coincidentally called block):
-(id) initWithBlockType:(int)type {
self = [super init];
//blocktype
self.blockType = type;
NSLog(@"The block type is %i", self.blockType);
//texture
CCTexture2D * texture = [[CCTextureCache sharedTextureCache] addImage:@"block_soft.png"];
NSAssert(texture!=nil, @"Invalid texture for sprite");
CGRect rect = CGRectZero;
rect.size = texture.contentSize;
return [self initWithTexture:texture rect:rect];
}
This example uses the textureCache
agfa555
Member
@Codemattic - The texture is never displayed, blocks keep original texture. It's also not working for any other of my subclassed blocks. It does work on normal CCSpriite.
@David - Here's some code.
Here's the subclassing in .h:
@interface Block : CCSprite {
//Here are the variables
}
In .m I initialize Blocks like this:
if ((self = [super init]))
{
Block *block = [CCSprite spriteWithFile:file];
[self addChild:block];
}
return self;
Any clues???
Thanks again!!!!
Codemattic
Moderator
Block *block = [CCSprite spriteWithFile:file];doesnt xcode give you a warning at this line?
you are creating a CCSprite and storing it in Block-typed variable. Block is a subclass of CCSprite so its *more* specific than CCSprite so you cant assign in that direction. What if you access block.someBlockProperty except that it doesnt exist bc its really a CCSprite?
and if you tried:
Block *block = [Block spriteWithFile:file];you would get caught up in an infinite loop since every init of a Block creates a new Block which calls init which creates a new Block which...
So Im guessing you originally had that line, froze/crashed, changed it to what you have now, and got an xcode warning which youve ignored.
Why does Block create a new sprite which it adds to itself? Do you really need to have a Sprite with more Sprite(s) as children?
I would *never* let a Sprite have children. Nodes and Layers etc... should have children. But Sprites should be leaves. (leafs?) Nodes and Layers should be branches. I wish cocos would of enforced this in code but its too late now.
Codemattic
Moderator
@SwizzerSweet Im of the opinion that calling -init'ers more than once in creating an object is a bad idea and nearly always unnecessary. Would this work:
-(id) initWithBlockType:(int)type {
//texture
CCTexture2D * texture = [[CCTextureCache sharedTextureCache] addImage:@"block_soft.png"];
NSAssert(texture!=nil, @"Invalid texture for sprite");
CGRect rect = CGRectZero;
rect.size = texture.contentSize;
if (self = [super initWithTexture:texture rect:rect]) {
//blocktype
self.blockType = type;
NSLog(@"The block type is %i", self.blockType);
}
return self;
}
agfa555
Member
No warnings or errors and i've been working on this code for some time. Not even one warning in entire project.
I subclassed CCSprite cause i wanted to have some properties in Block which a normal CCSprite does not have. Is that wrong???
How would i accomplish that wih a normal CCSprite???
I also have noticed recently that after playing for a while it throws me an exception like this:
cocos2d: Couldn't add image: in CCTextureCache
and it is an image that the game has loaded many times during the game.
Could this have anything to do??? I have never user CCTextureCache so I don't know how it works.
Thank you...
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