Why do we set delegate to nil at dealloc if the object is going to be destroyed anyway?

Question

-(void) scrollViewDidScroll:(UIScrollView *)scrollView
{
    PO(NSStringFromCGPoint(self.tableView.contentOffset));
    PO(NSStringFromUIEdgeInsets(self.tableView.conten         


        

Answer 1

Lets say we have a SpriteKit scene where you have a gesture recognizer and you set its delegate.

Then you dealloc this scene and its recognizer from its controller.

It would lead to crash if the delegate method was called in scene during this process.