CB-7204

gistfile1.m

        __weak __typeof(self) weakSelf = self;
        
        [UIView transitionWithView:self.viewController.view
                          duration:fadeDuration
                           options:UIViewAnimationOptionTransitionNone
                        animations:^(void) {
                            __typeof(self) strongSelf = weakSelf;
                            if (strongSelf != nil) {
                                dispatch_async(dispatch_get_main_queue(), ^{
                                        [strongSelf->_activityView setAlpha:0];
                                        [strongSelf->_imageView setAlpha:0];
                                });
                            }
                        }
                        completion:^(BOOL finished) {
                            if (finished) {
                                dispatch_async(dispatch_get_main_queue(), ^{
                                        [weakSelf destroyViews];
                                });
                            }
                        }
        ];