Question

I have a class named insect child of sprite.I have created a
instance of that class in GameLayer and then initialize with
it using,

insect *bgg = [insect spriteWithFile:@"bird2a.gif"];

then i set a timer(10 second) to change the image using

*bgg = [insect spriteWithFile:@"2.gif"];

but my program crashes.Now my question is it possible to
re-initialize an object or it is immutable??

I have another question, when i used

- (BOOL) ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *) event

{
UITouch *touch = [touches anyObject];
CGPoint point2 = [touch locationInView:[touch view]];

CGPoint cpoint=[[Director sharedDirector] convertCoordinate:point2];
NSLog(@"In touch began");

}


in my insect class it cannot detect touch on ‘bgg’ object declared
in GameLayer.But when I used this function in GameLayer it can
detect touch.

whats wrong with my approach??Plz someone explain.

Advanced thanx for your reply.

Answer 1

Your program crashes because you have a typo. Remove the ‘*’ from ‘*bgg’. That means you are dereferencing the pointer, then trying to apply the creation of a new object to the dereferenced pointer. You just want

bgg = [insect spriteWithFile:@"2.gif"];

However, it’s overkill to create an entirely new sprite just to change the image. A Sprite is a subclass of TextureNode, so just use TextureNode’s texture property to give a Sprite a different image.

Texture2D *newImage = [[TextureMgr sharedTextureMgr] addImage:@"2.gif"];
bgg.texture = newImage;