CCNA, CCNP, MCSA, CCNA Final Exam, All Answer Test Module With 100/100

Hi every one here is my code: -(void) createNewImage { [imageView setCenter:[self randomPointSquare]]; [[self view] addSubview:imageView]; [views addObject:imageView]; [imageView release]; ix=imageView.center.x; iy=imageView.center.y; [XArray addObject:[NSNumber numberWithFloat:(240 - ix)/diviseurVitesse]]; [YArray addObject:[NSNumber numberWithFloat:(160 - iy)/diviseurVitesse]]; } -(void)moveTheImage{ for (NSUInteger i = 0; i < [views count]; i++) { imageView = [views objectAtIndex:i]; X = [[XArray objectAtIndex:i] floatValue]; Y = [[YArray objectAtIndex:i] floatValue]; imageView.center=CGPointMake(imageView.center.x + X, imageView.center.y + Y); } With this code, image are created and move to the center of the screen but after some seconds the performance decrease and come to 30fps. I would like to keep fps at 60 but I don't know how to proceed.Some people say that I can use pool but it's hard for me to use it because I don't really know how to us