feat: make tabview backgroudn transparent (#402)

Author: okwasniewski

.changeset/dull-walls-share.md

@@ -0,0 +1,5 @@
+---
+'react-native-bottom-tabs': patch
+---
+
+feat: make tabview background transparent

packages/react-native-bottom-tabs/ios/TabViewImpl.swift

@@ -56,6 +56,8 @@ struct TabViewImpl: View {
         }
       #endif
       .introspectTabView { tabController in
+        tabController.view.backgroundColor = .clear
+        tabController.viewControllers?.forEach { $0.view.backgroundColor = .clear }
         #if os(macOS)
           tabBar = tabController
         #else

packages/react-native-bottom-tabs/ios/TabViewProvider.swift

@@ -45,7 +45,7 @@ public final class TabInfo: NSObject {
 }
 
 @objc public class TabViewProvider: PlatformView {
-  private var delegate: TabViewProviderDelegate?
+  private weak var delegate: TabViewProviderDelegate?
   private var props = TabViewProps()
   private var hostingController: PlatformHostingController<TabViewImpl>?
   private var coalescingKey: UInt16 = 0
@@ -212,6 +212,7 @@ public final class TabInfo: NSObject {
 
     if let hostingController = self.hostingController, let parentViewController = reactViewController() {
       parentViewController.addChild(hostingController)
+      hostingController.view.backgroundColor = .clear
       addSubview(hostingController.view)
       hostingController.view.translatesAutoresizingMaskIntoConstraints = false
       hostingController.view.pinEdges(to: self)