在xamarin forms ios中更改选项卡栏图标和“更多”选项卡部分中的文本的颜色

using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;

[assembly: ExportRenderer(typeof(TabbedPage), typeof(CustomTabbedRenderer))]
namespace YourNamespace.iOS
{
    public class CustomTabbedRenderer : TabbedRenderer
    {
        public override void ViewWillAppear(bool animated)
        {
            base.ViewWillAppear(animated);
            CustomizeTabBar();
        }

        private void CustomizeTabBar()
        {
            var tabBarController = (UITabBarController)ViewController;
            if (tabBarController != null)
            {
                foreach (var viewController in tabBarController.ViewControllers)
                {
                    if (viewController is UINavigationController navController)
                    {
                        var tabBarItem = navController.TabBarItem;
                        tabBarItem.Image = GetImageWithColor(tabBarItem.Image, UIColor.Blue); // 更改图标颜色
                        tabBarItem.Title = GetColoredTitle(tabBarItem.Title, UIColor.Blue); // 更改文本颜色
                    }
                }

                // 更改“更多”选项卡的文本颜色
                var moreViewController = tabBarController.MoreNavigationController;
                if (moreViewController != null)
                {
                    foreach (var viewController in moreViewController.ViewControllers)
                    {
                        viewController.NavigationItem.Title = GetColoredTitle(viewController.NavigationItem.Title, UIColor.Blue);
                    }
                }
            }
        }

        private UIImage GetImageWithColor(UIImage image, UIColor color)
        {
            UIGraphics.BeginImageContextWithOptions(image.Size, false, image.CurrentScale);
            var context = UIGraphics.GetCurrentContext();
            context.TranslateCTM(0, image.Size.Height);
            context.ScaleCTM(1.0, -1.0);
            context.SetBlendMode(CGBlendMode.Normal);
            var rect = new CGRect(0, 0, image.Size.Width, image.Size.Height);
            context.DrawImage(rect, image.CGImage);
            context.SetBlendMode(CGBlendMode.SourceIn);
            context.SetFillColor(color.CGColor);
            context.FillRect(rect);
            var newImage = UIGraphics.GetImageFromCurrentImageContext();
            UIGraphics.EndImageContext();
            return newImage;
        }

        private string GetColoredTitle(string title, UIColor color)
        {
            var attributes = new UITextAttributes
            {
                TextColor = color
            };
            return title;
        }
    }
}

[assembly: ExportRenderer(typeof(TabbedPage), typeof(CustomTabbedRenderer))]