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49 lines
1.4 KiB
Objective-C
49 lines
1.4 KiB
Objective-C
//
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// ASDisplayNode+Convenience.m
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// Texture
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//
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// Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
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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 /ASDK-Licenses directory of this source tree. An additional
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// grant of patent rights can be found in the PATENTS file in the same directory.
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//
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// Modifications to this file made after 4/13/2017 are: Copyright (c) 2017-present,
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// Pinterest, Inc. Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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#import "ASDisplayNode+Convenience.h"
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#import <UIKit/UIViewController.h>
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#import <AsyncDisplayKit/ASDisplayNodeExtras.h>
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#import <AsyncDisplayKit/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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