ios - Swift，无法读取url中的数据

Question

我运行了这个，但当我尝试发送数据时没有任何反应。所以我调试了这个，它无法从 url 中读取任何内容。它说“无法读取数据”。我检查了 url 是否正确，我检查了这个服务器是否正常以及我的 php 代码。只有当我升级到 swift 2 或 Xcode7 时，我才会遇到这个问题。感谢您的帮助!

let myUrl = NSURL(string: "http://localhost/SwiftAppAndMySQL/scripts/registerUser.php");
let request = NSMutableURLRequest(URL:myUrl!);
request.HTTPMethod = "POST";

let postString = "userEmail=\(userEmail!)&userFirstName=\(userFirstName!)&userLastName=\(userLastName!)&userPassword=\(userPassword!)";

request.HTTPBody = postString.dataUsingEncoding(NSUTF8StringEncoding);

NSURLSession.sharedSession().dataTaskWithRequest(request, completionHandler: { (data:NSData?, response:NSURLResponse?, error:NSError?) -> Void in

    dispatch_async(dispatch_get_main_queue())
        {

            //spinningActivity.hide(true)

            if error != nil {
                self.displayAlertMessage(error!.localizedDescription)
                return
            }

            do {
                let json = try NSJSONSerialization.JSONObjectWithData(data!, options: .MutableContainers) as? NSDictionary

                if let parseJSON = json {

                    let userId = parseJSON["userId"] as? String

                    if( userId != nil)
                    {
                        let myAlert = UIAlertController(title: "Alert", message: "Registration successful", preferredStyle: UIAlertControllerStyle.Alert);

                        let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.Default){(action) in

                            self.dismissViewControllerAnimated(true, completion: nil)
                        }

                        myAlert.addAction(okAction);
                        self.presentViewController(myAlert, animated: true, completion: nil)
                    } else {
                        let errorMessage = parseJSON["message"] as? String
                        if(errorMessage != nil)
                        {
                            self.displayAlertMessage(errorMessage!)
                        }

                    }

                }
            } catch{
                print(error)
            }    

        }

    }).resume()

Answer 1

I experience this problem only when I upgraded to swift 2 or Xcode7.

Xcode 7 包含带有 iOS 9 的 iOS 模拟器。iOS 9 有一个新功能——App Transport Security (ATS)，它可以防止不安全的连接 (http)。更多信息:

• App Transport Security Technote
• How to allow http-connections with ATS