Tapping on status bar returns to call

We want to render the return-to-call banner behind the status bar, so
the user can see the system clock, etc.

But normally, doing so would mean we wouldn't receive touches in the top
20px of the screen.

// FREEBIE

Signal/src/AppDelegate.m

@@ -1162,4 +1162,17 @@ static NSTimeInterval launchStartedAt;
     [AppUpdateNag.sharedInstance showAppUpgradeNagIfNecessary];
 }
 
+#pragma mark - status bar touches
+
+- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
+{
+    [super touchesBegan:touches withEvent:event];
+    CGPoint location = [[[event allTouches] anyObject] locationInView:[self window]];
+    CGRect statusBarFrame = [UIApplication sharedApplication].statusBarFrame;
+    if (CGRectContainsPoint(statusBarFrame, location)) {
+        DDLogDebug(@"%@ touched status bar", self.logTag);
+        [[NSNotificationCenter defaultCenter] postNotificationName:TappedStatusBarNotification object:nil];
+    }
+}
+
 @end

SignalMessaging/ViewControllers/ReturnToCallViewController.swift

@@ -17,6 +17,7 @@ public class ReturnToCallViewController: UIViewController {
     let returnToCallLabel = UILabel()
 
     public func startAnimating() {
+        NotificationCenter.default.addObserver(self, selector: #selector(didTapStatusBar(notification:)), name: .TappedStatusBar, object: nil)
         self.returnToCallLabel.layer.removeAllAnimations()
         self.returnToCallLabel.alpha = 1
         UIView.animate(withDuration: 1,
@@ -27,6 +28,7 @@ public class ReturnToCallViewController: UIViewController {
     }
 
     public func stopAnimating() {
+        NotificationCenter.default.removeObserver(self, name: .TappedStatusBar, object: nil)
         self.returnToCallLabel.layer.removeAllAnimations()
     }
 
@@ -56,6 +58,11 @@ public class ReturnToCallViewController: UIViewController {
         self.delegate?.returnToCallWasTapped(self)
     }
 
+    @objc
+    public func didTapStatusBar(notification: Notification) {
+        self.delegate?.returnToCallWasTapped(self)
+    }
+
     override public func viewWillLayoutSubviews() {
         Logger.debug("\(self.logTag) in \(#function)")
 

SignalMessaging/contacts/ViewControllerUtils.h

@@ -8,6 +8,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 extern const NSUInteger kMin2FAPinLength;
 extern const NSUInteger kMax2FAPinLength;
+extern NSString *const TappedStatusBarNotification;
 
 @interface ViewControllerUtils : NSObject
 

SignalMessaging/contacts/ViewControllerUtils.m

@@ -11,6 +11,8 @@
 
 NS_ASSUME_NONNULL_BEGIN
 
+NSString *const TappedStatusBarNotification = @"TappedStatusBarNotification";
+
 const NSUInteger kMin2FAPinLength = 4;
 const NSUInteger kMax2FAPinLength = 16;