All this to center content in a view for iPhones

setContentGutterForIphoneUsingView

- ( void )setContentGutterForIphoneUsingView:( UIView * )view
{
// macro to determine device
  if( IS_IPHONE )
  {
    UIView *container = [UIView new];
    container.backgroundColor = [UIColor clearColor];
    container.translatesAutoresizingMaskIntoConstraints = NO;
    
    UIView *content = [UIView new];
    content.backgroundColor = [UIColor orangeColor];
    content.translatesAutoresizingMaskIntoConstraints = NO;
    
    [container addSubview:_contentScrollView];
    [container addSubview:content];
    [self.view addSubview:container];
    
    // set width and height of the container
    [self.view addConstraint:[NSLayoutConstraint constraintWithItem:container
                                                          attribute:NSLayoutAttributeWidth
                                                          relatedBy:NSLayoutRelationEqual
                                                             toItem:nil
                                                          attribute:NSLayoutAttributeNotAnAttribute
                                                         multiplier:1
                                                           constant:self.view.frame.size.width]];
    
    // the view passed in is the menu and this varies based on logged in/out
    float gutter = view.frame.size.height + view.frame.origin.y;
    [self.view addConstraint:[NSLayoutConstraint constraintWithItem:container
                                                          attribute:NSLayoutAttributeHeight
                                                          relatedBy:NSLayoutRelationEqual
                                                             toItem:nil
                                                          attribute:NSLayoutAttributeNotAnAttribute
                                                         multiplier:1
                                                           constant:self.view.frame.size.height - gutter]];
    
    // put the container at the bottom of the view passed in 
    [self.view addConstraint:[NSLayoutConstraint constraintWithItem:container
                                                          attribute:NSLayoutAttributeTop
                                                          relatedBy:NSLayoutRelationEqual
                                                             toItem:view
                                                          attribute:NSLayoutAttributeBottom
                                                         multiplier:1
                                                           constant:0]];
    
    // set the width and height of the content to be whatever the content asset sizes are
    [self.view addConstraint:[NSLayoutConstraint constraintWithItem:content
                                                          attribute:NSLayoutAttributeWidth
                                                          relatedBy:NSLayoutRelationEqual
                                                             toItem:nil
                                                          attribute:NSLayoutAttributeNotAnAttribute
                                                         multiplier:1
                                                           constant:kTileSize_iPhone]];
    
    [self.view addConstraint:[NSLayoutConstraint constraintWithItem:content
                                                          attribute:NSLayoutAttributeHeight
                                                          relatedBy:NSLayoutRelationEqual
                                                             toItem:nil
                                                          attribute:NSLayoutAttributeNotAnAttribute
                                                         multiplier:1
                                                           constant:kTileSize_iPhone]];
    
    // set the content to the midpoint (Y) of the container
    [self.view addConstraint:[NSLayoutConstraint constraintWithItem:content
                                                          attribute:NSLayoutAttributeCenterY
                                                          relatedBy:NSLayoutRelationEqual
                                                             toItem:container
                                                          attribute:NSLayoutAttributeCenterY
                                                         multiplier:1
                                                           constant:0]];
    
    // layout, so we have our frame for content
    [self.view layoutIfNeeded];
    // NSLog(@"%@", NSStringFromCGRect(content.frame));
    
    // store for later use
    iPhonetileVerticalOffset = content.frame.origin.y;
    // and remove this useless view
    [content removeFromSuperview];
  }
}

Setting the language to Obj-C does nothing.