iphone - Render texture using Cocos 2d and Box 2d -

i have cocos2d , box2d application. have image bubble.png. want draw chain of bubbles when user swipes screen.

can tell me how ?

thanks

- (void)cctouchesmoved:(nsset *)touches withevent:(uievent *)event{ {         //add new body/atlas sprite @ touched location         for( uitouch *touch in touches ) {              cgpoint location = [touch locationinview: [touch view]];             location = [[ccdirector shareddirector] converttogl: location];              b2vec2 locationworld = b2vec2(location.x/ptm_ratio, location.y/ptm_ratio);              ccsprite *mist=[ccsprite spritewithfile:@"bubble.png"];             mist.position=ccp(location.x,location.y);              [self addchild:mist];         } }