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cache result of responds to selector

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Garrett Moon
2015-08-12 11:46:46 -07:00
parent 4f4a26d2a3
commit 592e0301dd
1 changed files with 8 additions and 5 deletions
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13
AsyncDisplayKit/ASCollectionView.mm
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@@ -119,7 +119,8 @@ static BOOL _isInterceptedSelector(SEL sel)
NSMutableArray *_batchUpdateBlocks;
BOOL _asyncDataFetchingEnabled;
BOOL _implementsInsetSection;
BOOL _asyncDelegateImplementsInsetSection;
BOOL _collectionViewLayoutImplementsInsetSection;
ASBatchContext *_batchContext;
@@ -175,6 +176,8 @@ static BOOL _isInterceptedSelector(SEL sel)
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(deviceOrientationDidChange) name:UIDeviceOrientationDidChangeNotification object:nil];
}
_collectionViewLayoutImplementsInsetSection = [layout respondsToSelector:@selector(sectionInset)];
return self;
}
@@ -255,12 +258,12 @@ static BOOL _isInterceptedSelector(SEL sel)
super.delegate = nil;
_asyncDelegate = nil;
_proxyDelegate = nil;
_implementsInsetSection = NO;
_asyncDelegateImplementsInsetSection = NO;
} else {
_asyncDelegate = asyncDelegate;
_proxyDelegate = [[_ASCollectionViewProxy alloc] initWithTarget:_asyncDelegate interceptor:self];
super.delegate = (id<UICollectionViewDelegate>)_proxyDelegate;
_implementsInsetSection = ([_asyncDelegate respondsToSelector:@selector(collectionView:layout:insetForSectionAtIndex:)] ? 1 : 0);
_asyncDelegateImplementsInsetSection = ([_asyncDelegate respondsToSelector:@selector(collectionView:layout:insetForSectionAtIndex:)] ? 1 : 0);
}
}
@@ -554,11 +557,11 @@ static BOOL _isInterceptedSelector(SEL sel)
{
CGSize restrainedSize = self.bounds.size;
UIEdgeInsets sectionInset = UIEdgeInsetsZero;
if ([self.collectionViewLayout respondsToSelector:@selector(sectionInset)]) {
if (_collectionViewLayoutImplementsInsetSection) {
sectionInset = [(UICollectionViewFlowLayout *)self.collectionViewLayout sectionInset];
}
if (_implementsInsetSection) {
if (_asyncDelegateImplementsInsetSection) {
sectionInset = [_asyncDelegate collectionView:self layout:self.collectionViewLayout insetForSectionAtIndex:indexPath.section];
}