From 80916636eca9472ed1b3c3129cee07028f36ca5d Mon Sep 17 00:00:00 2001
From: Jeff Bailey <dogsonic22@gmail.com>
Date: Wed, 7 Dec 2016 10:07:45 -0800
Subject: [PATCH] =?UTF-8?q?Fix=20for=20issue=20#294=20-=20Support=20for=20?=
 =?UTF-8?q?UIAppearance=20in=20IGListCollectionView=E2=80=A6?=
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Summary:
Updated IGListCollectionView:initWithFrame:collectionViewLayout constructor to support UIAppearance for the backgroundColor property.

Fixes #294

- [x] All tests pass. Demo project builds and runs.
- [x] I added tests, an experiment, or detailed why my change isn't tested.
- [x] I have reviewed the [contributing guide](https://github.com/Instagram/IGListKit/blob/master/.github/CONTRIBUTING.md)
Closes https://github.com/Instagram/IGListKit/pull/298

Differential Revision: D4292394

Pulled By: rnystrom

fbshipit-source-id: a7c4f0e516728b684993f2651eadcc25001de783
---
 Source/IGListCollectionView.m | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Source/IGListCollectionView.m b/Source/IGListCollectionView.m
index 6a0a3aa3..feace35a 100644
--- a/Source/IGListCollectionView.m
+++ b/Source/IGListCollectionView.m
@@ -13,7 +13,12 @@
 
 - (instancetype)initWithFrame:(CGRect)frame collectionViewLayout:(UICollectionViewLayout *)layout {
     if (self = [super initWithFrame:frame collectionViewLayout:layout]) {
-        self.backgroundColor = [UIColor whiteColor];
+        
+        UIColor *backgroundAppearanceColor = (UIColor *) [[[self class] appearance] backgroundColor];
+        if (!backgroundAppearanceColor) {
+            self.backgroundColor = [UIColor whiteColor];
+        }
+        
         self.alwaysBounceVertical = YES;
     }
     return self;