我已經看過StackOverFlow。沒有現有的問題似乎幫助我。在PFLogInViewController上呈現* .viewController,其視圖不在窗口層次結構中
我使用ParseUI來處理用戶登錄功能,但在簽署新用戶時遇到問題。
問題:當用戶去註冊,點擊「註冊」按鈕,這個錯誤似乎也沒有發生賽格瑞:
<Warning: Attempt to present edus.ClassEntryViewController: 0x7f8800ceb0a0> on <PFLogInViewController: 0x7f8800c2f520> whose view is not in the window hierarchy!
我不知道如何解決這個問題。以下相關代碼:
import UIKit
import Parse
import Bolts
import ParseUI
import FBSDKCoreKit
import ParseFacebookUtils
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
var parseLoginHelper: ParseLoginHelper!
override init() {
super.init()
parseLoginHelper = ParseLoginHelper {[unowned self] user, error in
// Initialize the ParseLoginHelper with a callback
if let error = error {
// 1
ErrorHandling.defaultErrorHandler(error)
} else if let user = user {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
//creation
let classNavEntry = storyboard.instantiateViewControllerWithIdentifier("ClassNavEntry") as! UIViewController
//presentation. PROBLEM HERE??
self.window?.rootViewController!.presentViewController(classNavEntry, animated:true, completion:nil)
}
}
}
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
let user = PFUser.currentUser()
let startViewController: UIViewController;
if (user != nil) {
// 3
// if we have a user, set the ClassNavEntry to be the initial View Controller
let storyboard = UIStoryboard(name: "Main", bundle: nil)
//problem may arise here
startViewController =
storyboard.instantiateViewControllerWithIdentifier("ClassNavEntry") as! UINavigationController
} else {
// 4
// Otherwise set the LoginViewController to be the first
let loginViewController = PFLogInViewController()
loginViewController.fields = .UsernameAndPassword | .LogInButton | .SignUpButton | .PasswordForgotten | .Facebook
loginViewController.delegate = parseLoginHelper
loginViewController.signUpController?.delegate = parseLoginHelper
startViewController = loginViewController
}
// 5
self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
self.window?.rootViewController = startViewController;
self.window?.makeKeyAndVisible()
更新:我知道是什麼原因造成的問題,仍然搞清楚如何解決它。
問題是有兩個視圖控制器:loginViewController和SignupViewController。我指定根視圖控制器是這裏的loginViewController:
loginViewController.delegate = parseLoginHelper
loginViewController.signUpController?.delegate = parseLoginHelper
startViewController = loginViewController
}
// 5
self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
//THIS SPECIFIES ROOTVIEW TO BE LOGINVIEWCONTROLLER
self.window?.rootViewController = startViewController
self.window?.makeKeyAndVisible()
所以我需要能夠調用parseHelper上SignUpViewController以及...
哎ESSAM!主要問題是PFUserSignUp是一個不同於PFLogIn的視圖控制器...我必須找到一種方法來使用PFUserSignUp中的ParseLogInHelper –