From 481ff983e45eb64019d0e506b6cdbd453803676d Mon Sep 17 00:00:00 2001
From: Mandea Daniel <daniel.mandea@yahoo.com>
Date: Fri, 27 Nov 2015 13:46:47 +0200
Subject: [PATCH] Fixed KVC remove observer crash for
 XLTwitterPagerTabStripViewController

---
 .../XL/Controllers/XLTwitterPagerTabStripViewController.m   | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/XLPagerTabStrip/XL/Controllers/XLTwitterPagerTabStripViewController.m b/XLPagerTabStrip/XL/Controllers/XLTwitterPagerTabStripViewController.m
index aab8ed1..3f9694a 100644
--- a/XLPagerTabStrip/XL/Controllers/XLTwitterPagerTabStripViewController.m
+++ b/XLPagerTabStrip/XL/Controllers/XLTwitterPagerTabStripViewController.m
@@ -174,7 +174,11 @@
 
 -(void)dealloc
 {
-    [self.navigationView removeObserver:self forKeyPath:@"frame"];
+    // Perform a try catch when removing a observer in case it was never registered
+    @try {
+        [self.navigationView removeObserver:self forKeyPath:@"frame"];
+    }
+    @catch (NSException * __unused exception) {}
 }