fix: preventRecentScreenshots compatibility with iOS modals

- ensure it doesn't dismiss the modal when becoming active
- ensure it shows up on top of a modal

Author: Matthieu Gicquel

example/App.tsx

@@ -1,8 +1,20 @@
-import { Button, StyleSheet, View } from "react-native";
+import { useState } from "react";
+import { Button, Modal, StyleSheet, View } from "react-native";
 
 export default function App() {
+  const [isModalVisible, setIsModalVisible] = useState(false);
+
   return (
     <View style={styles.container}>
+      <Modal visible={isModalVisible}>
+        <View style={styles.modal}>
+          <Button
+            title="close modal"
+            onPress={() => setIsModalVisible(false)}
+          />
+        </View>
+      </Modal>
+      <Button title="open modal" onPress={() => setIsModalVisible(true)} />
       <Button title="fetch - valid certificates" onPress={fetchValid} />
       <Button title="fetch - invalid certificates" onPress={fetchInvalid} />
     </View>
@@ -17,6 +29,12 @@ const styles = StyleSheet.create({
     justifyContent: "center",
     gap: 16,
   },
+  modal: {
+    flex: 1,
+    alignItems: "center",
+    justifyContent: "center",
+    backgroundColor: "lightblue",
+  },
 });
 
 const fetchValid = async () => {

ios/RNASAppLifecyleDelegate.swift

@@ -2,11 +2,14 @@ import ExpoModulesCore
 import UIKit
 
 public class RNASAppLifecycleDelegate: ExpoAppDelegateSubscriber {
+    private var launchScreenViewController: UIViewController?
+
     public func applicationDidFinishLaunching(_ application: UIApplication) {
         if(!isPreventRecentScreenshotsEnabled()) {
             return
         }
-            application.ignoreSnapshotOnNextApplicationLaunch()
+        
+        application.ignoreSnapshotOnNextApplicationLaunch()
     }
 
     public func applicationWillResignActive(_ application: UIApplication) {
@@ -15,20 +18,18 @@ public class RNASAppLifecycleDelegate: ExpoAppDelegateSubscriber {
         }
 
         // https://developer.apple.com/documentation/uikit/app_and_environment/scenes/preparing_your_ui_to_run_in_the_background
-        
-        // TODO: better error handling in case there's an issue with the splashscreen (instead of !)
-        let launchScreen = UIStoryboard(name: "SplashScreen", bundle: nil).instantiateInitialViewController()!
-        launchScreen.modalPresentationStyle = .overFullScreen
-        
-        UIApplication.shared.windows.first?.rootViewController?.present(launchScreen, animated: false)
+                
+        if let launchScreen = UIStoryboard(name: "SplashScreen", bundle: nil).instantiateInitialViewController() {
+            launchScreen.modalPresentationStyle = .overFullScreen
+            getTopMostViewController().present(launchScreen, animated: false)
+            launchScreenViewController = launchScreen
+        }
     }
 
     public func applicationDidBecomeActive(_ application: UIApplication) {
-        if(!isPreventRecentScreenshotsEnabled()) {
-            return
+        launchScreenViewController?.dismiss(animated: false) {
+            self.launchScreenViewController = nil
         }
-
-        UIApplication.shared.windows.first?.rootViewController?.dismiss(animated: false)
     }
 }
 
@@ -39,3 +40,16 @@ func isPreventRecentScreenshotsEnabled() -> Bool {
     }
     return false
 }
+
+
+func getTopMostViewController() -> UIViewController {
+    // We want to display the overlay over any content currently presented, including modals
+    
+    var topController: UIViewController = UIApplication.shared.windows.first!.rootViewController!
+    
+    while (topController.presentedViewController != nil) {
+        topController = topController.presentedViewController!
+    }
+    
+    return topController
+}