From cded20c736de2fcb7c801bdcb3c2626cb98772d3 Mon Sep 17 00:00:00 2001
From: Dick <initlife.inc@gmail.com>
Date: Mon, 22 Dec 2014 16:58:16 +0800
Subject: [PATCH] duplicate failed urls are added into failedURLs

fix bug when download image with option SDWebImageRetryFailed
---
 SDWebImage/SDWebImageManager.m | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/SDWebImage/SDWebImageManager.m b/SDWebImage/SDWebImageManager.m
index 38f75f0c..0d2f31be 100644
--- a/SDWebImage/SDWebImageManager.m
+++ b/SDWebImage/SDWebImageManager.m
@@ -194,7 +194,9 @@
 
                     if (error.code != NSURLErrorNotConnectedToInternet && error.code != NSURLErrorCancelled && error.code != NSURLErrorTimedOut) {
                         @synchronized (self.failedURLs) {
-                            [self.failedURLs addObject:url];
+                            if (![self.failedURLs containsObject:url]) {
+                                [self.failedURLs addObject:url];
+                            }
                         }
                     }
                 }