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change the order we tear things down in setAsyncDelegate/DataSource to avoid a random crash in UIScrollViewAccessibility.

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This commit is contained in:
Ethan Nagel
2015-05-12 12:11:05 -07:00
parent f248dbddd1
commit 58402b6af0
2 changed files with 9 additions and 5 deletions
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6
AsyncDisplayKit/ASCollectionView.mm
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@@ -193,9 +193,9 @@ static BOOL _isInterceptedSelector(SEL sel)
return;
if (asyncDataSource == nil) {
super.dataSource = nil;
_asyncDataSource = nil;
_proxyDataSource = nil;
super.dataSource = nil;
} else {
_asyncDataSource = asyncDataSource;
_proxyDataSource = [[_ASCollectionViewProxy alloc] initWithTarget:_asyncDataSource interceptor:self];
@@ -209,9 +209,11 @@ static BOOL _isInterceptedSelector(SEL sel)
return;
if (asyncDelegate == nil) {
// order is important here, the delegate must be callable while nilling super.delegate to avoid random crashes
// in UIScrollViewAccessibility.
super.delegate = nil;
_asyncDelegate = nil;
_proxyDelegate = nil;
super.delegate = nil;
} else {
_asyncDelegate = asyncDelegate;
_proxyDelegate = [[_ASCollectionViewProxy alloc] initWithTarget:_asyncDelegate interceptor:self];