[ASElementMap] Fix indexPath's section or item is actually negative #…

…trivial (#457) * [ASElementMap] Fix indexPath's section or item is actually negative. * Small code style changes
TextureGroup · Sep 18, 2017 · d4846dc · d4846dc
1 parent e330e57
commit d4846dc
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/Source/Details/ASElementMap.m b/Source/Details/ASElementMap.m
@@ -218,7 +218,7 @@ - (NSString *)description
 - (BOOL)sectionIndexIsValid:(NSInteger)section assert:(BOOL)assert
 {
   NSInteger sectionCount = _sectionsOfItems.count;
-  if (section >= sectionCount) {
+  if (section >= sectionCount || section < 0) {
     if (assert) {
       ASDisplayNodeFailAssert(@"Invalid section index %zd when there are only %zd sections!", section, sectionCount);
     }
@@ -246,7 +246,7 @@ - (BOOL)itemIndexPathIsValid:(NSIndexPath *)indexPath assert:(BOOL)assert item:(
 
   NSInteger itemCount = _sectionsOfItems[section].count;
   NSInteger item = indexPath.item;
-  if (item >= itemCount) {
+  if (item >= itemCount || item < 0) {
     if (assert) {
       ASDisplayNodeFailAssert(@"Invalid item index %zd in section %zd which only has %zd items!", item, section, itemCount);
     }