ios - UIViewController 实例问题

Question

我正在尝试在单独的 swift 文件 (Login.swift) 上设置 NSUserDefaults 变量以确定我的用户是否已登录。如果用户确实已登录，则 LoginViewController 将消失并显示 HomeViewController。但是我被抛出这个错误

Use of instance member 'dismissViewControllerAnimated' on type 'UIViewController'; did you mean to use a value of type 'UIViewController' instead?

这是我的代码

//success
else if value["username"] != nil && value["password"] == nil && value["message"] == nil
{
 NSUserDefaults.standardUserDefaults().setBool(true, forKey: "isUserLoggedIn")

 LoginViewController.dismissViewControllerAnimated(true, completion:nil)

 if let api_key = value["api_token"].string
 {
    print("The token is " + api_key)
 }
 else
 {
    print("error parsing api token")
 }
 //pass data to Users class
 _ = Users.init(Name: value["name"].string, Email: value["email"].string, Id: value["id"].int, ProfilePicture: value["profile_picture"].string, Username: value["username"].string)
 }

Answer 1

创建LoginViewController 的对象。使用该对象然后调用 dismissViewControllerAnimated 函数。不允许从类名直接调用