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56 lines
1.9 KiB
Objective-C
56 lines
1.9 KiB
Objective-C
/* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import <Foundation/Foundation.h>
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@class ASDelegateProxy;
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@protocol ASDelegateProxyInterceptor <NSObject>
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@required
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// Called if the target object is discovered to be nil if it had been non-nil at init time.
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// This happens if the object is deallocated, because the proxy must maintain a weak reference to avoid cycles.
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// Though the target object may become nil, the interceptor must not; it is assumed the interceptor owns the proxy.
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- (void)proxyTargetHasDeallocated:(ASDelegateProxy *)proxy;
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@end
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/**
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* Stand-in for delegates like UITableView or UICollectionView's delegate / dataSource.
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* Any selectors flagged by "interceptsSelector" are routed to the interceptor object and are not delivered to the target.
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* Everything else leaves AsyncDisplayKit safely and arrives at the original target object.
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*/
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@interface ASDelegateProxy : NSProxy
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- (instancetype)initWithTarget:(id <NSObject>)target interceptor:(id <ASDelegateProxyInterceptor>)interceptor;
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// This method must be overridden by a subclass.
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- (BOOL)interceptsSelector:(SEL)selector;
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@end
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/**
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* ASTableView intercepts and/or overrides a few of UITableView's critical data source and delegate methods.
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*
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* Any selector included in this function *MUST* be implemented by ASTableView.
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*/
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@interface ASTableViewProxy : ASDelegateProxy
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@end
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/**
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* ASCollectionView intercepts and/or overrides a few of UICollectionView's critical data source and delegate methods.
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*
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* Any selector included in this function *MUST* be implemented by ASCollectionView.
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*/
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@interface ASCollectionViewProxy : ASDelegateProxy
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@end
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@interface ASPagerNodeProxy : ASDelegateProxy
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@end
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