[iOS] Fixed crash in UISearchBar style

iphone/Maps/Core/Theme/Core/StyleManager.swift

@@ -36,6 +36,8 @@
         listener.applyTheme()
       }
     }
+
+    UISearchBarRenderer.setAppearance()
   }
 
   private func updateView(_ view: UIView?) {

iphone/Maps/Core/Theme/GlobalStyleSheet.swift

@@ -31,7 +31,7 @@ class GlobalStyleSheet: IStyleSheet {
     theme.add(styleName: "SearchBar") { (s) -> (Void) in
       s.backgroundColor = colors.white
       s.barTintColor = colors.primary
-      s.tintColor = colors.blackPrimaryText
+      s.tintColor = UIColor.white
       s.fontColor = colors.blackSecondaryText
     }
 

iphone/Maps/Core/Theme/Renderers/UISearchBarRenderer.swift

@@ -13,23 +13,29 @@ extension UISearchBar {
 class UISearchBarRenderer: UIViewRenderer {
   class func render(_ control: UISearchBar, style: Style) {
     super.render(control, style: style)
-    if let backgroundColor = style.backgroundColor {
-      control.searchTextField.backgroundColor = backgroundColor
-    }
     if let barTintColor = style.barTintColor {
       control.barTintColor = barTintColor
     }
     if let tintColor = style.tintColor {
       control.tintColor = tintColor
-      if let image = control.searchTextField.leftView as? UIImageView {
-        image.tintColor = tintColor
+    }
+  }
+
+  //fix for iOS 12 and below
+  class func setAppearance() {
+    for style in StyleManager.shared.getStyle("SearchBar") {
+      if let backgroundColor = style.backgroundColor {
+        UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).backgroundColor = backgroundColor
+      }
+      if let tintColor = style.tintColor {
+        UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).leftView?.tintColor = tintColor
+      }
+      if let font = style.font {
+        UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).font = font
+      }
+      if let fontColor = style.fontColor {
+        UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).textColor = fontColor
       }
-    }
-    if let font = style.font {
-      control.searchTextField.font = font
-    }
-    if let fontColor = style.fontColor {
-      control.searchTextField.textColor = fontColor
     }
   }
 }