Considers hidesBottomBarWhenPushed too. Fixes slackhq#362

Author: Ignacio Romero Zurbuchen

Examples/Messenger-Storyboard/Base.lproj/Main.storyboard

@@ -1,14 +1,14 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="9059" systemVersion="14F27" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="0WO-Kt-Oxc">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="9531" systemVersion="14F27" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="0WO-Kt-Oxc">
     <dependencies>
         <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="9049"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="9529"/>
     </dependencies>
     <scenes>
         <!--Message View Controller-->
         <scene sceneID="tne-QT-ifu">
             <objects>
-                <viewController id="BYZ-38-t0r" customClass="MessageViewController" sceneMemberID="viewController">
+                <viewController hidesBottomBarWhenPushed="YES" id="BYZ-38-t0r" customClass="MessageViewController" sceneMemberID="viewController">
                     <layoutGuides>
                         <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
                         <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>

Source/SLKTextViewController.m

@@ -416,8 +416,12 @@ - (CGFloat)slk_appropriateBottomMargin
 {
     // A bottom margin is required only if the view is extended out of it bounds
     if ((self.edgesForExtendedLayout & UIRectEdgeBottom) > 0) {
-        if (self.tabBarController) {
-            return CGRectGetHeight(self.tabBarController.tabBar.frame);
+        
+        UITabBar *tabBar = self.tabBarController.tabBar;
+        
+        // Considers the bottom tab bar, unless it will be hidden
+        if (tabBar && !tabBar.hidden && !self.hidesBottomBarWhenPushed) {
+            return CGRectGetHeight(tabBar.frame);
         }
     }