UISearchBar底线

Question

如何删除UISearchBar在UITableViewController中的底线？

快速解决方案也可以应用。

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这是我的VC代码：

NavigationController.NavigationBar.PrefersLargeTitles = true;
NavigationController.NavigationItem.LargeTitleDisplayMode =  UINavigationItemLargeTitleDisplayMode.Automatic;
NavigationItem.HidesSearchBarWhenScrolling = false;
var searchController = new UISearchController(searchResultsController: null);
NavigationItem.SearchController = searchController;
NavigationItem.SearchController.DefinesPresentationContext = true;
NavigationItem.SearchController.DimsBackgroundDuringPresentation = false;

对于AppDeletage.cs

UINavigationBar.Appearance.Translucent = false;
UINavigationBar.Appearance.ShadowImage = new UIImage();

我尝试了我在互联网上找到的几乎所有的解决方案。

不要使用下一个解决方案：

UISearchBar.Appearance.BackgroundImage = null;
UISearchBar.Appearance.BackgroundColor= UIColor.Clear;

NavigationItem.SearchController.Layer.BorderWidth = 0
NavigationItem.SearchController.Layer.BorderColor = UIColor.White.CGColor

NavigationItem.SearchController.SearchBar.ClipsToBounds = true;

Answer 1

以下是解决办法：

public override void ViewWillLayoutSubviews()
{
    base.ViewWillLayoutSubviews();
    ((UIImageView) NavigationItem.SearchController.SearchBar.Superview?.Subviews.First().Subviews.First()).Bounds = CGRect.Null;
}