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[ASTableView] Add retainedLayer a la collection view (#1896)

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This commit is contained in:
Adlai Holler
2016-07-11 20:22:45 -07:00
committed by appleguy
parent 7f4737217e
commit 6b44b5ac05
1 changed files with 14 additions and 0 deletions
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14
AsyncDisplayKit/ASTableView.mm
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@@ -11,6 +11,7 @@
#import "ASTableViewInternal.h"
#import "ASAssert.h"
#import "ASAvailability.h"
#import "ASBatchFetching.h"
#import "ASCellNode+Internal.h"
#import "ASChangeSetDataController.h"
@@ -111,6 +112,15 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
CGFloat _contentOffsetAdjustment;
CGPoint _deceleratingVelocity;
/**
* Our layer, retained. Under iOS < 9, when table views are removed from the hierarchy,
* their layers may be deallocated and become dangling pointers. This puts the table view
* into a very dangerous state where pretty much any call will crash it. So we manually retain our layer.
*
* You should never access this, and it will be nil under iOS >= 9.
*/
CALayer *_retainedLayer;
CGFloat _nodesConstrainedWidth;
BOOL _ignoreNodesConstrainedWidthChange;
@@ -235,6 +245,10 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
self.strongTableNode = tableNode;
}
if (!AS_AT_LEAST_IOS9) {
_retainedLayer = self.layer;
}
return self;
}