* [ios] clear original image when new src set

Project: http://git-wip-us.apache.org/repos/asf/incubator-weex/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-weex/commit/f87f25bc
Tree: http://git-wip-us.apache.org/repos/asf/incubator-weex/tree/f87f25bc
Diff: http://git-wip-us.apache.org/repos/asf/incubator-weex/diff/f87f25bc

Branch: refs/heads/master
Commit: f87f25bce550e089ebbc9b682d2cbf8534c5340b
Parents: ca7c085
Author: acton393 <zhangxing610...@gmail.com>
Authored: Mon Sep 25 23:04:01 2017 +0800
Committer: acton393 <zhangxing610...@gmail.com>
Committed: Mon Sep 25 23:04:01 2017 +0800

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 ios/sdk/WeexSDK/Sources/Component/WXImageComponent.m | 1 +
 1 file changed, 1 insertion(+)
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http://git-wip-us.apache.org/repos/asf/incubator-weex/blob/f87f25bc/ios/sdk/WeexSDK/Sources/Component/WXImageComponent.m
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diff --git a/ios/sdk/WeexSDK/Sources/Component/WXImageComponent.m 
b/ios/sdk/WeexSDK/Sources/Component/WXImageComponent.m
index b68f45a..90c29a1 100644
--- a/ios/sdk/WeexSDK/Sources/Component/WXImageComponent.m
+++ b/ios/sdk/WeexSDK/Sources/Component/WXImageComponent.m
@@ -340,6 +340,7 @@ WX_EXPORT_METHOD(@selector(save:))
     if (![src isEqualToString:_imageSrc]) {
         _imageSrc = src;
         _imageDownloadFinish = NO;
+        ((UIImageView*)self.view).image = nil;
         [self updateImage];
     }
     pthread_mutex_unlock(&(_imageSrcMutex));

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