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41 lines
1.0 KiB
Plaintext
41 lines
1.0 KiB
Plaintext
//
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// ASDisplayNode+Convenience.mm
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// Texture
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//
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// Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
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// Changes after 4/13/2017 are: Copyright (c) Pinterest, Inc. All rights reserved.
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// Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
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//
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#import <AsyncDisplayKit/ASDisplayNode+Convenience.h>
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#import <UIKit/UIViewController.h>
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#import <AsyncDisplayKit/ASDisplayNodeExtras.h>
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#import "ASResponderChainEnumerator.h"
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@implementation ASDisplayNode (Convenience)
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- (__kindof UIViewController *)closestViewController
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{
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ASDisplayNodeAssertMainThread();
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// Careful not to trigger node loading here.
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if (!self.nodeLoaded) {
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return nil;
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}
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// Get the closest view.
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UIView *view = ASFindClosestViewOfLayer(self.layer);
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// Travel up the responder chain to find a view controller.
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for (UIResponder *responder in [view asdk_responderChainEnumerator]) {
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UIViewController *vc = ASDynamicCast(responder, UIViewController);
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if (vc != nil) {
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return vc;
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}
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}
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return nil;
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}
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@end
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