AsyncDisplayKit/AsyncDisplayKit/ASNavigationController.m at master · SummerXZX/AsyncDisplayKit · GitHub

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// ASNavigationController.m

// AsyncDisplayKit

// Created by Garrett Moon on 4/27/16.

// 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 "ASNavigationController.h"

@implementation ASNavigationController

{

BOOL _parentManagesVisibilityDepth;

NSInteger _visibilityDepth;

}

ASVisibilityDidMoveToParentViewController;

ASVisibilityViewWillAppear;

ASVisibilityViewDidDisappearImplementation;

ASVisibilitySetVisibilityDepth;

ASVisibilityDepthImplementation;

- (void)visibilityDepthDidChange

{

for (UIViewController *viewController in self.viewControllers) {

if ([viewController conformsToProtocol:@protocol(ASVisibilityDepth)]) {

[(id <ASVisibilityDepth>)viewController visibilityDepthDidChange];

}

- (NSInteger)visibilityDepthOfChildViewController:(UIViewController *)childViewController

{

NSUInteger viewControllerIndex = [self.viewControllers indexOfObjectIdenticalTo:childViewController];

if (viewControllerIndex == NSNotFound) {

//If childViewController is not actually a child, return NSNotFound which is also a really large number.

return NSNotFound;

}

if (viewControllerIndex == self.viewControllers.count - 1) {

//view controller is at the top, just return our own visibility depth.

return [self visibilityDepth];

} else if (viewControllerIndex == 0) {

//view controller is the root view controller. Can be accessed by holding the back button.

return [self visibilityDepth] + 1;

}

return [self visibilityDepth] + self.viewControllers.count - 1 - viewControllerIndex;

}

#pragma mark - UIKit overrides

- (NSArray *)popToViewController:(UIViewController *)viewController animated:(BOOL)animated

{

NSArray *viewControllers = [super popToViewController:viewController animated:animated];