基于逻辑的SWIFT分段 [英] Segue in swift based on a logic

问题描述

我希望在应用程序首次启动时，基于If语句在SWIFT中显示两个视图中的一个如何实现 这就是逻辑

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

推荐答案

一种方法是，您可以使用以下代码的标识符来初始化视图控制器：

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AppDelegate.swift

中执行此操作

以下是您的代码：

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
}

希望它能对您有所帮助。

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