From 2e4812a5e7ec2cfe41d3fa812eb8a516e4cf1732 Mon Sep 17 00:00:00 2001
From: Anton Schukin <anton.schukin@corp.badoo.com>
Date: Fri, 15 Apr 2016 14:26:36 +0100
Subject: [PATCH] Fixed iOS 8 crash

---
 .../Source/ChatController/Collaborators/KeyboardTracker.swift | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Chatto/Source/ChatController/Collaborators/KeyboardTracker.swift b/Chatto/Source/ChatController/Collaborators/KeyboardTracker.swift
index 7c95fb0..1c322d7 100644
--- a/Chatto/Source/ChatController/Collaborators/KeyboardTracker.swift
+++ b/Chatto/Source/ChatController/Collaborators/KeyboardTracker.swift
@@ -125,6 +125,7 @@ class KeyboardTracker {
         return max(0, self.view.bounds.height - trackingViewRect.maxY)
     }
 
+    var ios8WorkaroundIsInProgress = false
     func layoutTrackingViewIfNeeded() {
         guard self.isTracking && self.keyboardStatus == .Shown else { return }
         self.adjustTrackingViewSizeIfNeeded()
@@ -132,8 +133,11 @@ class KeyboardTracker {
             // Working fine on iOS 9
         } else {
             // Workaround for iOS 8
+            guard !self.ios8WorkaroundIsInProgress else { return }
+            self.ios8WorkaroundIsInProgress = true
             self.trackingView.window?.setNeedsLayout()
             self.trackingView.window?.layoutIfNeeded()
+            self.ios8WorkaroundIsInProgress = false
         }
     }