Question

即使我在NSUSERdefault中设置了值，我也会变成空白用户使用锁定模式但是相同的代码不适用于App的超时（5分钟）用户是vcLogin.usernameTxt？.text = uname即将出现空白甚至NSUserDefaults.standardUserDefaults（）。objectForKey（“Username”）as！字符串具有值

            let storyboard = UIStoryboard(name: "Main", bundle: nil)
            let vcLogin = storyboard.instantiateViewControllerWithIdentifier("Login") as! LoginViewController
            var uname:String!
            if (NSUserDefaults.standardUserDefaults().objectForKey("Username") != nil) {
                print("username =\(NSUserDefaults.standardUserDefaults().objectForKey("Username"))")
               uname = NSUserDefaults.standardUserDefaults().objectForKey("Username") as! String
                NSUserDefaults.standardUserDefaults().synchronize()

            }else{
              uname = ""
            }



            let navVC = self.window?.rootViewController as? UINavigationController

            var arr=[UIViewController]()
            arr = (navVC?.viewControllers)!


            if ((arr.last?.isKindOfClass(LoginViewController)) != nil) {

               arr.append(vcLogin)
                navVC?.viewControllers = arr
                print("name=\(uname)")
                //if uname != nil {
                vcLogin.usernameTxt?.text =  uname
                //}
            }






        }

    }

Answer 1

let theUsername = NSUserDefaults.standardUserDefaults().objectForKey("Username")!
print("username =\(theUsername)")

顺便问一下，为什么要使用Swift 2？

在App Timeout中显示用户名空白

1 个答案: