ios - 使用标签栏 Controller-> Nav controller -> View Hierarchy 从 app delegate 呈现 View - iOS Swift

Question

我搜索了整个 S.O 并找到了类似的文章，但没有一个解决方案适合我。下面是我的 View 层次结构的屏幕截图

我尝试过的许多代码片段之一如下:

            var storyBoard = UIStoryboard()
            if UIDevice.current.userInterfaceIdiom == .pad {
                storyBoard = UIStoryboard(name: "iPad", bundle: nil)
            } else {
                storyBoard = UIStoryboard(name: "Main", bundle: nil)
            }


            let tabVc = self.window?.rootViewController as! UITabBarController


            let mynVC = storyBoard.instantiateViewController(withIdentifier: "nav") as! UINavigationController


            let calcVc = storyBoard.instantiateViewController(withIdentifier: "destVc")


            tabVc.present(mynVC, animated: true, completion: { () -> Void in
              // Segue , do stuff

            })

上面的代码显示了带有导航栏的正确选项卡，但是没有选项卡。

我想要一个强制触摸按钮来显示带有导航栏和标签栏的选项卡，有人知道该怎么做吗？

Answer 1

目前我无法对此进行全面测试，但我相信在标签栏中，您不会显示 View Controller 。您设置它的 View Controller 项和 selectedViewController 属性。

这应该可以，我会测试它并尽快更新，

var storyBoard = UIStoryboard()
        if UIDevice.current.userInterfaceIdiom == .pad {
            storyBoard = UIStoryboard(name: "iPad", bundle: nil)
        } else {
            storyBoard = UIStoryboard(name: "Main", bundle: nil)
        }


        let tabVc = self.window?.rootViewController as! UITabBarController

        let mynVC = storyBoard.instantiateViewController(withIdentifier: "nav") as! UINavigationController

        let calcVc = storyBoard.instantiateViewController(withIdentifier: "destVc")

        tabVc.viewControllers = [mynVC]
        tabVc.selectedViewController = mynVC

根据下面的其他内容，您可能还需要调用 window.setKeyAndVisible() 才能实际显示