[incubator-weex] 01/01: [iOS] Protect nil argument for convertContainerToImmutable.

[mo...@apache.org]

This is an automated email from the ASF dual-hosted git repository.

moshen pushed a commit to branch protect-argument-convert
in repository https://gitbox.apache.org/repos/asf/incubator-weex.git

commit c09b54b818e5ca60aa58bcfc202f107e116047ff
Author: qianyuan.wqy <qi...@taobao.com>
AuthorDate: Mon Aug 12 10:20:55 2019 +0800

    [iOS] Protect nil argument for convertContainerToImmutable.
---
 ios/sdk/WeexSDK/Sources/Utility/WXUtility.m | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/ios/sdk/WeexSDK/Sources/Utility/WXUtility.m b/ios/sdk/WeexSDK/Sources/Utility/WXUtility.m
index 73c1108..6ec4223 100644
--- a/ios/sdk/WeexSDK/Sources/Utility/WXUtility.m
+++ b/ios/sdk/WeexSDK/Sources/Utility/WXUtility.m
@@ -268,6 +268,12 @@ CGFloat WXFloorPixelValue(CGFloat value)
     if ([source isKindOfClass:[NSArray class]]) {
         NSMutableArray* tmpArray = [[NSMutableArray alloc] init];
         for (id obj in source) {
+            if (obj == nil) {
+                /* srouce may be a subclass of NSArray and the subclassed
+                 array may return nil in its overridden objectAtIndex: method.
+                 So obj could be nil!!!. */
+                continue;
+            }
             [tmpArray addObject:[self convertContainerToImmutable:obj]];
         }
         id immutableArray = [NSArray arrayWithArray:tmpArray];