
[英]View not displaying for childViewController of another ChildViewController
[英]iOS-Swift-add navigationController as ChildViewController of another navigationController
我在UiVIewController中有一些代码,如下所示
self.navigationController?.addChildViewController(someNavigationController)
self.navigationController?.view.addSubview(someNavigationController.view)
someNavigationController.didMove(toParentViewController:self.navigationController!)
但是子项navigationController的topviewcontroller从未出现。 知道为什么吗?
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