ios - 基于逻辑快速进行Segue

Question

我想在应用程序首次启动时基于 if 语句在 swift 中显示两个 View 之一，我该怎么做这是逻辑

if signupconfirmed == true {
// have to show one view 
} else {
// have to show another view 
}

Answer 1

一种方法是您可以使用以下代码启动带有标识符的 viewController:

var signupconfirmed = true
@IBAction func signUpPressed(sender: AnyObject) {

    if signupconfirmed {
        // have to show one view
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let vc = storyboard.instantiateViewControllerWithIdentifier("First") as! SViewController
        self.presentViewController(vc, animated: true, completion: nil)
    } else {
        // have to show another view
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let vc = storyboard.instantiateViewControllerWithIdentifier("Second") as! TViewController
        self.presentViewController(vc, animated: true, completion: nil)
    }
}

更新:

您可以在您的 AppDelegate.swift 中执行此操作

这是您的代码:

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

    let signupconfirmed = NSUserDefaults.standardUserDefaults().boolForKey("SignUp")
    self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
    var initialViewController = UIViewController()
    var storyboard = UIStoryboard(name: "Main", bundle: nil)
    if signupconfirmed {
        initialViewController = storyboard.instantiateViewControllerWithIdentifier("First") as! UIViewController
    } else{
        initialViewController = storyboard.instantiateViewControllerWithIdentifier("Second") as! UIViewController
    }

    self.window?.rootViewController = initialViewController
    self.window?.makeKeyAndVisible()
    return true
}

希望对你有所帮助。