egion.regionToNorth != nil)         {             self.region = centerRegion.regionToNorth;             [self reloadRegion];             self.regionToNorthScreenshot = [self.collectionView snapshotViewAfterScreenUpdates:YES];         }         else         {             self.regionToNorthScreenshot = [[UIView alloc] init];             self.regionToNorthScreenshot.backgroundColor = [UIColor darkGrayColor];         }         [self.view.superview addSubview:self.regionToNorth