以下是我的应用程序的情节提要：
该应用程序在 screen1 上与服务器建立连接，并且与服务器的所有通信仅在此屏幕的代码中执行。我们在 screen4 上发出请求，通过 screen1 的代码发送到服务器，app 收到服务器的响应。如果应用程序获得成功响应，那么应用程序应该显示 screen5，我得到错误。我写了不同的代码行但失败了。以下是我现在使用的代码行：
import UIKit
class logoViewController: UIViewController {
@IBOutlet weak var act: UIActivityIndicatorView!
override func viewDidLoad() {
super.viewDidLoad()
self.act.startAnimating()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// syncreq function is called from the connectionViewController.
// connectionViewController is the common class for connecting to the remote server
func syncreq (JSONdata: AnyObject) { // Proceesing for PRMS response
// Getting the value from the JSON
var Successful = self.getIntFromJSON(JSONdata as NSDictionary, key: "Successful")
println("Value of Successful : \(Successful)")
if (Successful == 0){
//Method1 not worked
// let adduser = regVC()
// self.presentViewController(adducer, animated: true, completion: nil)
//Method2 not worked
//let adducer = self.storyboard?.instantiateViewControllerWithIdentifier("registrationID") as regVC
//self.navigationController?.pushViewController(adducer, animated: true)
//Method3 not worked
//let secondViewController = self.storyboard?.instantiateViewControllerWithIdentifier("registrationID") as regVC
//self.navigationController?.pushViewController(secondViewController, animated: true)
//performSegueWithIdentifier("registrationID", sender: self)
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
var setViewController = mainStoryboard.instantiateViewControllerWithIdentifier("registrationID") as RegisterViewController
self.presentViewController(setViewController, animated: false, completion: nil)
}
else if (Successful == 1){
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
var setViewController = mainStoryboard.instantiateViewControllerWithIdentifier("mnuID") as menuViewController
self.presentViewController(setViewController, animated: false, completion: nil)
}
}
func getIntFromJSON(data: NSDictionary, key: String) -> Int {
let info : AnyObject? = data[key]
// println("Value of data[key] : \(key)")
if let info = data[key] as? Int {
println("Value of value for \(key) : \(info)")
return info
}
else {
return 0
}
}
}
我收到以下错误：
Warning: Attempt to present <project.screen5: 0x7a094790> on <project.ViewController: 0x79639d90> whose view is not in the window hierarchy!
错误截图：
