Swiftgram/AsyncDisplayKit/Details/Transactions/_ASAsyncTransactionContainer.h
Adlai Holler 88d588d590 [ASDisplayNode] Use Weak Proxy to Avoid Dangling CALayer.delegate (#2249)
* Add weak proxy between node and layer to avoid dangling layer problem

* Add failing test case for dangling CALayer.delegate pointer issue

* Add docs

* Remove asynctransactioncontainer forwarding preprocessor macro

* Improve comments

* Remove asyncTransactionContainerStateDidChange callback
2016-09-15 10:49:31 -07:00

68 lines
2.7 KiB
Objective-C

//
// _ASAsyncTransactionContainer.h
// AsyncDisplayKit
//
// Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
#import <UIKit/UIKit.h>
@class _ASAsyncTransaction;
typedef NS_ENUM(NSUInteger, ASAsyncTransactionContainerState) {
/**
The async container has no outstanding transactions.
Whatever it is displaying is up-to-date.
*/
ASAsyncTransactionContainerStateNoTransactions = 0,
/**
The async container has one or more outstanding async transactions.
Its contents may be out of date or showing a placeholder, depending on the configuration of the contained ASDisplayLayers.
*/
ASAsyncTransactionContainerStatePendingTransactions,
};
@protocol ASDisplayNodeAsyncTransactionContainer
/**
@summary If YES, the receiver is marked as a container for async display, grouping all of the async display calls
in the layer hierarchy below the receiver together in a single ASAsyncTransaction.
@default NO
*/
@property (nonatomic, assign, getter=asyncdisplaykit_isAsyncTransactionContainer, setter=asyncdisplaykit_setAsyncTransactionContainer:) BOOL asyncdisplaykit_asyncTransactionContainer;
/**
@summary The current state of the receiver; indicates if it is currently performing asynchronous operations or if all operations have finished/canceled.
*/
@property (nonatomic, readonly, assign) ASAsyncTransactionContainerState asyncdisplaykit_asyncTransactionContainerState;
/**
@summary Cancels all async transactions on the receiver.
*/
- (void)asyncdisplaykit_cancelAsyncTransactions;
@end
@interface CALayer (ASDisplayNodeAsyncTransactionContainer) <ASDisplayNodeAsyncTransactionContainer>
/**
@summary Returns the current async transaction for this container layer. A new transaction is created if one
did not already exist. This method will always return an open, uncommitted transaction.
@desc asyncdisplaykit_isAsyncTransactionContainer does not need to be YES for this to return a transaction.
*/
@property (nonatomic, readonly, strong) _ASAsyncTransaction *asyncdisplaykit_asyncTransaction;
/**
@summary Goes up the superlayer chain until it finds the first layer with asyncdisplaykit_isAsyncTransactionContainer=YES (including the receiver) and returns it.
Returns nil if no parent container is found.
*/
@property (nonatomic, readonly, strong) CALayer *asyncdisplaykit_parentTransactionContainer;
@end
@interface UIView (ASDisplayNodeAsyncTransactionContainer) <ASDisplayNodeAsyncTransactionContainer>
@end