iOS - Title Position

TitlePosition.cs

void SetTitlePosition( CustomNavigationPage.TitleAlignment alignment,Thickness padding, Thickness margin, CGRect vFrame)
{
            
            var marginX = margin.Top;
            var marginY = margin.Left;
            var marginWidth = margin.Left + margin.Right;
            var marginHeight = margin.Top + margin.Bottom;
            var paddingWidth = padding.Left + padding.Right;
            var paddingHeight = padding.Top + padding.Bottom;
            var paddingX = padding.Left;
            var paddingY = padding.Top;

            if(CustomNavigationPage.GetTitleBackground(Element) !=null && vFrame.Width == 0 && vFrame.Height == 0)
            {
                vFrame = titleView.Frame;
            }


            marginView.Frame = new CGRect(vFrame.X, vFrame.Y, vFrame.Width, vFrame.Height);
            

            

            double offset = 0;
            
            titleLabel.AutoresizingMask = UIViewAutoresizing.All;
            switch (alignment)
            {
                case CustomNavigationPage.TitleAlignment.Start:
                    marginView.Frame = new CGRect( vFrame.X, marginView.Frame.Y, marginView.Bounds.Width + marginWidth + paddingWidth, marginView.Bounds.Height + marginHeight + paddingHeight);
                    var startCenter = marginView.Center;
                    startCenter.Y = marginView.Superview.Center.Y;
                    marginView.Center = startCenter;
                    titleLabel.TextAlignment = UITextAlignment.Left;
                    subtitleLabel.TextAlignment = UITextAlignment.Left;
                    offset = marginX;
                    break;
                case CustomNavigationPage.TitleAlignment.Center:
                    offset = marginX;
                    marginView.Frame = new CGRect(marginView.Frame.X , marginView.Frame.Y , marginView.Bounds.Width + marginWidth + paddingWidth, marginView.Bounds.Height + marginHeight + paddingHeight);
                    marginView.Center = marginView.Superview.Center;
                    titleLabel.TextAlignment = UITextAlignment.Center;
                    subtitleLabel.TextAlignment = UITextAlignment.Center;
                    break;
                case CustomNavigationPage.TitleAlignment.End:
                    
                    var endCenter = marginView.Center;
                    endCenter.Y = marginView.Superview.Center.Y;
                    marginView.Center = endCenter;

                    titleLabel.TextAlignment = UITextAlignment.Right;
                    subtitleLabel.TextAlignment = UITextAlignment.Right;
                    marginView.Frame = new CGRect(marginView.Superview.Frame.Width - marginView.Frame.Width - offset -marginWidth-paddingWidth, marginView.Frame.Y , marginView.Bounds.Width + marginWidth + paddingWidth, marginView.Bounds.Height +marginHeight + paddingHeight);
                    offset = marginView.Frame.Width - vFrame.Width - paddingWidth - marginX;
                    break;
            }
          
            titleView.Frame = new CGRect(offset , vFrame.Y + marginY, vFrame.Width + paddingWidth, vFrame.Height + paddingHeight);

            var cPage = Element as CustomPage;



            if (cPage != null && (!string.IsNullOrEmpty(cPage.Subtitle) || (cPage.FormattedSubtitle != null && cPage.FormattedSubtitle.Spans.Count > 0)))
            {

                
                titleLabel.Frame = new CGRect(paddingX, paddingY, titleView.Frame.Width , titleLabel.IntrinsicContentSize.Height);


                subtitleLabel.Frame = new CGRect(titleLabel.Frame.X, titleLabel.Frame.Y+titleLabel.Frame.Height + 3, titleView.Frame.Width, subtitleLabel.Frame.Height);
            
            }
            else
            {
                
                titleLabel.Frame = new CGRect(paddingX, paddingY, titleLabel.IntrinsicContentSize.Width, titleLabel.IntrinsicContentSize.Height );
      
            }
          
}