ios – 如何在swift中使用拆分视图控制器嵌入标签栏控制器？

2)在故事板上拖动TabBarController

3)将TabBarController更改为初始视图控制器.

4)控制从TabBarController拖动到SplitViewController

5)为故事板中的SplitViewController分配标题

6)在app委托中替换对SplitViewController的引用,如下所示.

let tabBarViewController = self.window!.rootViewController as! UITabBarController
print(tabBarViewController.viewControllers?.count)
var splitViewController:UISplitViewController? = nil
for viewController in tabBarViewController.viewControllers! {
if viewController.title == "Master" {
    splitViewController = viewController as? UISplitViewController
}
}

let navigationController = splitViewController!.viewControllers[splitViewController!.viewControllers.count-1] as! UINavigationController
navigationController.topViewController!.navigationItem.leftBarButtonItem = splitViewController!.displayModeButtonItem()
splitViewController!.delegate = self