我有一台服务器用于在我的应用程序中存储用户名和密码数据。在测试应用程序时,我使用NSDefaults将所有内容保存到本地设备,但现在应用程序即将完全启动,我试图将它们保存到服务器,因为它对用户而言更安全。信息。
当我把它保存到NSDefaults时,这很简单,也很简短。然而,现在,我正在尝试将数据发布到服务器并继续获取构建错误。为了实现这一目标,我需要改变什么?我不完全了解POST和GET的工作原理吗?谢谢。现在使用Swift 2,不是我的选择,我更喜欢3,但我的老板还没有让我们更新它。
当前错误来自POST USER DATA TO SERVER部分,其中xcode声称userNmeTxt无法转换为NSData。提前谢谢。
编辑:错误在第87行:"无法转换UITextField类型的值!预期参数类型NSData!"
import UIKit
class UserNameViewController: AuthorizationViewController {
@IBOutlet weak var userNameTxt: UITextField!
@IBOutlet weak var continueBtn: UIButton!
var userModel: ProfileModel!
//MARK: - SYSTEMS METHODS
override func viewDidLoad() {
super.viewDidLoad()
userNameTxt.delegate = self
userNameTxt.autocapitalizationType = .Sentences
setEnabledButton()
}
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
self.navigationController?.navigationBarHidden = false
self.navigationItem.leftBarButtonItem = getBackButton()
self.title = ""
}
override func viewWillDisappear(animated: Bool) {
self.navigationController?.navigationBarHidden = true
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
continueBtn.layer.cornerRadius = 10
}
override func popToRoot(sender:UIBarButtonItem){
self.navigationController!.popViewControllerAnimated(true)
}
//MARK: - CHECK FOR AVALABILITY
func setEnabledButton(){
if userNameTxt.text == "" {
continueBtn.backgroundColor = UIColor.lightGrayColor()
} else {
continueBtn.backgroundColor = UIColor(colorLiteralRed: 63.0/255.0, green: 220.0/255.0, blue: 236.0/255.0, alpha: 1.0)
}
continueBtn.userInteractionEnabled = userNameTxt.text != ""
}
//MARK: - POST USER DATA TO SERVER
func postData(url: String, params: Dictionary<String, String>, completionHandler: (data: NSData?, response: NSURLResponse?, error: NSError?) -> ()) {
// Indicate download
UIApplication.sharedApplication().networkActivityIndicatorVisible = true
let url = NSURL(string: "myPlaceholderURLgoesHere")!
// print("URL: \(url)")
let request = NSMutableURLRequest(URL: url)
let session = NSURLSession.sharedSession()
request.HTTPMethod = "POST"
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
// Verify downloading data is allowed
do {
request.HTTPBody = try NSJSONSerialization.dataWithJSONObject(params, options: [])
} catch let error as NSError {
print("Error in request post: \(error)")
request.HTTPBody = nil
} catch {
print("Catch all error: \(error)")
}
// Post the data
let task = session.dataTaskWithRequest(request) { data, response, error in
completionHandler(data: userNameTxt, response: userModel, error: error)
// Stop download indication
UIApplication.sharedApplication().networkActivityIndicatorVisible = false
// Stop download indication
}
task.resume()
}
//MARK: - SEGUE
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "toPassword"{
let controller = segue.destinationViewController as! PasswordViewController
controller.userModel = userModel
}
}
//MARK: - IB ACTIONS
@IBAction func continuePressed(sender: AnyObject) {
userModel.userNickName = userNameTxt.text!
performSegueWithIdentifier("toPassword", sender: self)
}
}
extension UserNameViewController: UITextFieldDelegate{
func textFieldDidEndEditing(textField: UITextField) {
self.setEnabledButton()
}
}
答案 0 :(得分:0)
您需要更改一些事项。
userNameTxt
不是用户名,而是包含用户名的UITextField。您需要的文字是userNameTxt.text?
如果该功能需要数据,则必须先将文本转换为数据
let task = session.dataTaskWithRequest(request) { data, response, error in
completionHandler(data: userNameTxt.text?.data(using: .utf8), response: userModel, error: error)
答案 1 :(得分:0)
我假设您必须将数据发送到服务器。
如果您还没有,可以将数据保存在钥匙串访问中,请参阅:SO: Keychain Access
为了解决错误,请使用错误消息和代码行编辑问题(如果可能)。
我建议您使用Alamofire进行POST / GET(REST)。要使用Alamofire,您需要有关Cocoapods的基本知识。从长远来看,它会更好。
注意:发出请求时可能会出现两种错误结果。
1)数据格式不正确或来自您身边的错误
2)服务器端的后端错误导致服务器错误。
可以使用POST从您的设备发送数据,其中数据位于请求的BODY或HEADER中。通常它在体内(alamofire方法中的参数)。
以下是一个例子:
import Alamofire
...
// MARK:- Login Feature - Universal Met for login
internal static func loginWith(serverUrl: String, parameters: [String: AnyObject]?, headers: [String: String]?, notificationName: String, serviceType: LoginService)
{
Alamofire.request(.POST, serverUrl, parameters: parameters, headers: headers).responseJSON
{ (response) in
print("\n Login feature - \n")
print(" Login url - \(serverUrl)\n")
print(" Login parameters - \(parameters)\n")
print(" Login notificationName - \(notificationName)\n")
print(" Login response - \(response)\n")
EXCDataParserH.parseResponseFrom(ServiceType.Login(type: serviceType),
operation: nil,
data: response.data,
notification: notificationName)
}
}
答案 2 :(得分:0)
不是在每次发出服务器请求时写下整个内容,而是尝试执行以下操作:
import Foundation
import SystemConfiguration
class HTTPHelper{
class func httpPostDataDic(postURL:NSURL,postString:NSString,completionHandler:@escaping (NSDictionary?, NSError?) -> Void ) -> URLSessionTask{
var responseResultData: NSDictionary = NSDictionary()
let request = NSMutableURLRequest(url:postURL as URL);
request.httpMethod = "POST";// Compose a query string
request.httpBody = postString.data(using: String.Encoding.utf8.rawValue);
print(request)
let task = URLSession.shared.dataTask(with: request as URLRequest) {
data, response, error in
if error != nil
{
print("error=\(error)")
completionHandler(nil, error as NSError?)
return
}
let responseString = NSString(data: data!, encoding: String.Encoding.utf8.rawValue)
if let responseString = responseString {
print("responseString = \(responseString)")
}
do {
let myJSON = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary
responseResultData=myJSON!
completionHandler(responseResultData, nil)
} catch {
print(error)
}
}
task.resume()
return task
}
}
现在,只要您需要发出服务器POST请求,请在ViewController类中执行以下操作:
//Requesting server
func requestServer() -> Void{
let postvariable = "Value"
let url = URL(string: "your url")!
let postString = "postkey=\(postvariable)"
HTTPHelper.httpPostDataDic(postURL: url as NSURL, postString: postString) {
(responseResult, error) -> Void in
DispatchQueue.main.async {
if error != nil{
print(error ?? "unknown")
}
else{
print(responseResult ?? "unknown result")
//Parse your response
self.parseResult(result: responseResult!);
}
}
}
}
我可以问你一件我在你的问题中无法理解的事情。 您如何在服务器中保存登录凭据?我的意思是,如果您在服务器中保存登录凭据,您将如何验证用户对这些已保存凭据的访问权限?