Screenshot of a view excluding views

screenshotOfView.m

- (UIImage *)screenshotOfView:(UIView *)view excludingViews:(NSArray *)excludedViews {
    if (!floor(NSFoundationVersionNumber) > NSFoundationVersionNumber_iOS_6_1) {
        NSCAssert(FALSE, @"iOS 7 or later is required.");
    }
    
    // hide all excluded views before capturing screen and keep initial value
    NSMutableArray *hiddenValues = [@[] mutableCopy];
    for (NSUInteger index=0;index<excludedViews.count;index++) {
        [hiddenValues addObject:[NSNumber numberWithBool:((UIView *)excludedViews[index]).hidden]];
        ((UIView *)excludedViews[index]).hidden = TRUE;
    }
    
    UIImage *image = nil;
    UIGraphicsBeginImageContextWithOptions(view.bounds.size, view.opaque, 0.0);
    [view drawViewHierarchyInRect:view.bounds afterScreenUpdates:YES];
    
    image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    // reset hidden values
    for (NSUInteger index=0;index<excludedViews.count;index++) {
        ((UIView *)excludedViews[index]).hidden = [[hiddenValues objectAtIndex:index] boolValue];
    }
    
    // clean up
    hiddenValues = nil;
    
    return image;
}

There's a weird issue on iPhone 7 simulator and Device it does not work with UIWindow.
If I exclude all subview of UIWindow the image will not be black but it works on iPhone 6 , 6s .....