From 9364af9b85f0a8d56b47548afb19404bc9cba3df Mon Sep 17 00:00:00 2001
From: Matthew Chen <matthew@signal.org>
Date: Tue, 17 Apr 2018 09:45:02 -0400
Subject: [PATCH] Make screen block view first responder.

---
 Signal/src/util/OWSScreenLockUI.m                          | 2 ++
 SignalMessaging/ViewControllers/ScreenLockViewController.m | 5 +++++
 2 files changed, 7 insertions(+)

diff --git a/Signal/src/util/OWSScreenLockUI.m b/Signal/src/util/OWSScreenLockUI.m
index b5123d364..37733f2a9 100644
--- a/Signal/src/util/OWSScreenLockUI.m
+++ b/Signal/src/util/OWSScreenLockUI.m
@@ -438,6 +438,8 @@ const UIWindowLevel UIWindowLevel_Background = -1.f;
         // Show the blocking window in front of the status bar.
         self.screenBlockingWindow.windowLevel = UIWindowLevelStatusBar + 1;
         self.rootWindow.hidden = YES;
+        [self.screenBlockingWindow becomeFirstResponder];
+        OWSAssert([self.screenBlockingWindow isFirstResponder]);
     } else {
         self.screenBlockingWindow.windowLevel = UIWindowLevel_Background;
         [self.rootWindow makeKeyAndVisible];
diff --git a/SignalMessaging/ViewControllers/ScreenLockViewController.m b/SignalMessaging/ViewControllers/ScreenLockViewController.m
index 772f21df7..cf2a961fb 100644
--- a/SignalMessaging/ViewControllers/ScreenLockViewController.m
+++ b/SignalMessaging/ViewControllers/ScreenLockViewController.m
@@ -136,4 +136,9 @@ NSString *NSStringForScreenLockUIState(ScreenLockUIState value)
     [self.delegate unlockButtonWasTapped];
 }
 
+- (BOOL)canBecomeFirstResponder
+{
+    return YES;
+}
+
 @end