Prevent input toolbar from appearing over camera view, contact view or actionsheet

// FREEBIE

Signal/src/ViewControllers/ContactsPicker.swift

@@ -44,6 +44,24 @@ public class ContactsPicker: OWSViewController, UITableViewDelegate, UITableView
         return Environment.current().contactsManager
     }
 
+    // HACK: Though we don't have an input accessory view, the VC we are presented above (ConversationVC) does.
+    // If the app is backgrounded and then foregrounded, when OWSWindowManager calls mainWindow.makeKeyAndVisible
+    // the ConversationVC's inputAccessoryView will appear *above* us unless we'd previously become first responder.
+    override public var canBecomeFirstResponder: Bool {
+        Logger.debug("\(self.logTag) in \(#function)")
+        return true
+    }
+
+    override public func becomeFirstResponder() -> Bool {
+        Logger.debug("\(self.logTag) in \(#function)")
+        return super.becomeFirstResponder()
+    }
+
+    override public func resignFirstResponder() -> Bool {
+        Logger.debug("\(self.logTag) in \(#function)")
+        return super.resignFirstResponder()
+    }
+
     private let collation = UILocalizedIndexedCollation.current()
     private let contactStore = CNContactStore()
 

Signal/src/ViewControllers/ConversationView/ConversationViewController.m

@@ -596,6 +596,28 @@ typedef enum : NSUInteger {
     [self markVisibleMessagesAsRead];
     [self.cellMediaCache removeAllObjects];
     [self cancelReadTimer];
+    [self dismissPresentedViewControllerIfNecessary];
+}
+
+- (void)dismissPresentedViewControllerIfNecessary
+{
+    UIViewController *_Nullable presentedViewController = self.presentedViewController;
+    if (!presentedViewController) {
+        DDLogDebug(@"%@ presentedViewController was nil", self.logTag);
+        return;
+    }
+
+    if ([presentedViewController isKindOfClass:[UIAlertController class]]) {
+        DDLogDebug(@"%@ dismissing presentedViewController: %@", self.logTag, presentedViewController);
+        [self dismissViewControllerAnimated:NO completion:nil];
+        return;
+    }
+
+    if ([presentedViewController isKindOfClass:[UIImagePickerController class]]) {
+        DDLogDebug(@"%@ dismissing presentedViewController: %@", self.logTag, presentedViewController);
+        [self dismissViewControllerAnimated:NO completion:nil];
+        return;
+    }
 }
 
 - (void)viewWillAppear:(BOOL)animated

Signal/src/ViewControllers/MediaGalleryViewController.swift

@@ -220,7 +220,10 @@ class MediaGalleryViewController: UINavigationController, MediaGalleryDataSource
         fatalError("init(coder:) has not been implemented")
     }
 
-    override var canBecomeFirstResponder: Bool {
+    // HACK: Though we don't have an input accessory view, the VC we are presented above (ConversationVC) does.
+    // If the app is backgrounded and then foregrounded, when OWSWindowManager calls mainWindow.makeKeyAndVisible
+    // the ConversationVC's inputAccessoryView will appear *above* us unless we'd previously become first responder.
+    override public var canBecomeFirstResponder: Bool {
         Logger.debug("\(self.logTag) in \(#function)")
         return true
     }