Question

我正在尝试使用App Delegate来打开视图控制器，具体取决于选择了哪种快速操作，但是我想将“ Bar Controller”选项卡放在底部。到目前为止，我的代码是：

    func application(_ application: UIApplication, performActionFor shortcutItem: UIApplicationShortcutItem, completionHandler: @escaping (Bool) -> Void) {
    let storyboard = UIStoryboard.init(name: "Main", bundle: nil)
    let tabBarController = storyboard.instantiateViewController(withIdentifier: "TabBar") as! UITabBarController

    let CLLViewC = storyboard.instantiateViewController(withIdentifier: "CLL")
    let OLLViewC = storyboard.instantiateViewController(withIdentifier: "OLLStoryboard")
    let PLLViewC = storyboard.instantiateViewController(withIdentifier: "PLL")

    let desiredVC = storyboard.instantiateViewController(withIdentifier: "OLLStoryboard")

    tabBarController.viewControllers = [CLLViewC, OLLViewC, PLLViewC]
    if shortcutItem.type == "com.LukeB.Cubing-practice.OLL" {
        OLLViewC.present(desiredVC, animated: true, completion: nil)
        print("present")
    }
}

这不起作用，并且出现错误Attempt to present <Cubing_practice.OLLViewController: 0x105803810> on <Cubing_practice.OLLViewController: 0x103f03c50> whose view is not in the window hierarchy! 尽管可以访问if语句，就像控制台确实说的那样，但是当我点击快速操作时打开的ViewController是默认的，就像我刚刚正常打开应用程序一样。

该如何解决？

通过快速操作打开ViewController，但将tabBarController保留在应用程序委托中

0 个答案: