如何从导航控制器切换到选项卡控制器并使其成为根视图控制器
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【中文标题】如何从导航控制器切换到选项卡控制器并使其成为根视图控制器【英文标题】:How to segue from a nav controller to tab controller and make it root view controller 【发布时间】:2016-10-31 00:32:14 【问题描述】:您好,当用户登录或想要注册应用程序时,我在导航控制器中有一个登录屏幕和注册屏幕。我还创建了一个显示主页屏幕的 Tab 控制器。用户登录或注册后,我希望能够转到选项卡控制器并将其设为根视图控制器,因此用户无法返回登录或注册页面。请问这个怎么实现?
下面是用户登录时的几行代码
if statusCode == 200
do
let json = try NSJSONSerialization.JSONObjectWithData(data, options: .AllowFragments)
let result = json as? [String: AnyObject]
guard let token = result!["token"], let firstname = result!["user"]!["firstname"]! else
print("Error: \(error?.debugDescription)")
return
NSUserDefaults.standardUserDefaults().setObject(token, forKey: "token")
//code to segue to the tab controller from the nav controller (login screen)
self.getHome()
catch
print("Error receiving data")
)
task.resume()
func getHome()
let storyboard:UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let tableController = storyboard.instantiateViewControllerWithIdentifier("tabController") as? UITableViewController
let appledDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
appledDelegate.window?.rootViewController = tableController
在我的 AppDelegate.swift 文件中,如果没有调用登录页面或显示主页,我会检查是否有令牌:
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool
let obj = NSUserDefaults.standardUserDefaults().objectForKey("token")
if obj == nil
let welcomeHomeController:UIViewController = WelcomeHomeController(nibName: nil, bundle: nil)
welcomeHomeController.view.backgroundColor = UIColor.whiteColor()
let navController:UINavigationController = UINavigationController(rootViewController: welcomeHomeController)
//create window
self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
self.window?.backgroundColor = UIColor.darkGrayColor()
self.window?.rootViewController = navController
self.window!.makeKeyAndVisible()
return true
【问题讨论】:
这篇文章可能对您有所帮助! ***.com/questions/39159444/… 【参考方案1】:func getHome()
let storyboard:UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let navController = storyboard.instantiateViewControllerWithIdentifier("tabController") as? UINavigationController //be sure to set the "tabController" in the navigationController and not in the tabcontroller
let next = navController.topViewController as! YourTabRootViewController
self.navigationController.presentViewController(next, animated: true, completion: nil)
【讨论】:
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