st         if (centerRegion.regionToSouth != nil && centerRegion.regionToSouth.regionToWest != nil)         {             self.region = centerRegion.regionToSouth.regionToWest;             [self reloadRegion];             self.regionToSouthwestScreenshot = [self.collectionView snapshotViewAfterScreenUpdates:YES];         }         else         {             self.regionToSouthwestScreenshot = [[UIView alloc] init];             self.regionToSouthwestScreenshot.backgroundColor = [UIColor darkGrayColor];         }         [self.view.superview addSubview:self.regionToSouth