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40 lines
924 B
Objective-C
40 lines
924 B
Objective-C
//
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// ASDisplayNode+Convenience.m
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// AsyncDisplayKit
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//
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// Created by Adlai Holler on 2/24/17.
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// Copyright © 2017 Facebook. All rights reserved.
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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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