Wie rufe ich einen webservice in Swift?

Gut, wenn Sie wollen einfach nur straight up-conversion aus, dass Objective-C-code zu schnellem, werde es so Aussehen wie unten. Jedoch, möchten Sie vielleicht zu sehen und Lesen Sie die links oben, um einen Eindruck zu bekommen, wie Sie schreiben, das besser in Swift.

    let url = NSURL(string: "http://myrestservice")
    let theRequest = NSURLRequest(URL: url)

    NSURLConnection.sendAsynchronousRequest(theRequest, queue: nil, completionHandler: {(response: NSURLResponse!, data: NSData!, error: NSError!) -> Void in
        if data.length > 0 && error == nil {
            let response : AnyObject! = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.fromMask(0), error: nil)
        }
    })

Für Swift 3.1

func callService ( urlString : String, httpMethod: String , data: Data , completion: @escaping (_ result: [String:AnyObject]) -> Void)
{

    let request = NSMutableURLRequest(url: NSURL(string: urlString)! as URL)
    //Set the method to POST
    request.httpMethod = httpMethod
    request.setValue("application/json", forHTTPHeaderField: "Content-Type")

    //Set the POST/put body for the request
     request.httpBody = data
     request.setValue(String.init(format: "%i", (data.count)), forHTTPHeaderField: "Content-Length")

    let session = URLSession.shared

    let task = session.dataTask(with: request as URLRequest, completionHandler: {data, response, error -> Void in
        if data == nil
        {
            var errorResponse = [String : AnyObject]()
            errorResponse["Error"] = "Issue" as AnyObject?
            completion(errorResponse)
        }
        else
        {
        if  let utf8Text = String(data: data! , encoding: .utf8) {
                completion(self.convertStringToDictionary(text: utf8Text)! as! [String : AnyObject])
        }
        else
        {
            var errorResponse = [String : AnyObject]()
            errorResponse["Error"] = "Issue" as AnyObject?
            completion(errorResponse)
            }
        }
    })
    task.resume()
}

func convertStringToDictionary(text: String) -> NSDictionary? {
    if let data = text.data(using: String.Encoding.utf8) {
        do {
            return try JSONSerialization.jsonObject(with: data, options: []) as? NSDictionary as! [String : AnyObject]? as NSDictionary?
        } catch let error as NSError {
            var errorResponse = [String : AnyObject]()
            errorResponse["Error"] = "Issue" as AnyObject?
            print(error)
            return errorResponse as NSDictionary?
        }
    }
    return nil
}

Verwenden oben genannten Funktionen rufen Sie Daten vom web service.

Und verwenden Sie folgenden code in eine beliebige Methode, um Daten von jedem service-Aufruf.

 let urlString = "Url String"
    var data = Data()
    do{
        let finalDict  = NSMutableDictionary()
       //finalDict.setValue(infoValue, forKey: "info")

        finalDict.setValue("------", forKey: "Token")

        let newdata = try JSONSerialization.data(withJSONObject:finalDict , options: [])
        let newdataString = String(data: newdata, encoding: String.Encoding.utf8)!
        print(newdataString)

        data = newdataString.data(using: .utf8)!

         let another =     try JSONSerialization.jsonObject(with: data, options: []) as? NSDictionary as! [String : AnyObject]? as NSDictionary?
        print(another!)

    }
    catch let error as NSError {
        print(error)
    }

    self.callService(urlString: urlString, httpMethod: "POST", data: data) { (response) in
        let mainData = response["meta"] as! NSDictionary
        var code = Int()
        code = mainData["code"]  as! Int
        if code != 200
        {
            var errorResponse = [String : AnyObject]()
            errorResponse["Error"] = "Issue" as AnyObject?
            completion(errorResponse)
        }
        else
        {
            completion(response)
        }
    }

Hoffe, das wird helfen.

import UIKit

Klasse ApidemoViewController: UIViewController,UITableViewDelegate,UITableViewDataSource {

var Arrfetchdata = Array<Any>()


@IBOutlet weak var tblApi: UITableView!
override func viewDidLoad() {
    super.viewDidLoad()

    let nib = UINib(nibName: "APIdemoTableViewCell", bundle: nil)
    tblApi.register(nib, forCellReuseIdentifier: "APIdemoTableViewCell")
    jsondata()
    //Do any additional setup after loading the view.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    //Dispose of any resources that can be recreated.
}
func jsondata()  {
    let url = URL(string : "http://www.exapmleurl.com")
    var request = URLRequest(url: url!)
    request.httpMethod="GET"

    let configuration = URLSessionConfiguration.default
    let session = URLSession(configuration: configuration, delegate: nil, delegateQueue: OperationQueue.main)
    let task = session.dataTask(with: request)
    { (Data,URLResponse,Error) in

        if(Error != nil)
        {
            print("Error")
        }
        else{
            do{
               self.Arrfetchdata = try JSONSerialization.jsonObject(with: Data!, options: .mutableLeaves) as! Array<Any>



                for eachdata in self.Arrfetchdata
                {
                    let alldata = eachdata as! NSDictionary
                    let id = alldata["id"] as! String
                    let urlshow = alldata["url"] as! String
                    let name = alldata["name"] as! String
                    let image = alldata["image"]
                    let isActive = alldata["isActive"] as! String

                    print(alldata)
                    print(id)
                    print(urlshow)
                    print(name)
                    print(image)
                    print(isActive)
                }


            }


            catch{
                print("Error")
            }

            self.tblApi.reloadData()
        }
    }
    task.resume()
}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return Arrfetchdata.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "APIdemoTableViewCell", for: indexPath)as! APIdemoTableViewCell

      let dictindex1 : NSDictionary = Arrfetchdata[indexPath.row] as! NSDictionary
      let strid :NSString = dictindex1["id"]! as! NSString
      let strurl :NSString = dictindex1["url"]! as! NSString
      let strname :NSString = dictindex1["name"]! as! NSString
    if let booleanValue = dictindex1["image"] as? Bool {

        let strbool = String(booleanValue)
        cell.lblapiimage.text = strbool
    }
    else
    {
        let strimage :NSString = dictindex1["image"]! as! NSString
        cell.lblapiimage.text = strimage as String
    }
     ///let strimage :Bool = dictindex1["image"]! as! Bool
     let strisActive :NSString = dictindex1["isActive"]! as! NSString
      cell.lblapiid.text = strid as String
      cell.lblapiurl.text = strurl as String
    cell.lblapiname.text = strname as String
    //cell.lblapiimage.text = strimage as Bool
    cell.lblapiisActive.text = strisActive as String
      return cell

}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let gosubcategory = SubcategoryAPIViewController(nibName: "SubcategoryAPIViewController", bundle: nil)
    let dicsubcat:NSDictionary=Arrfetchdata[indexPath.row] as! NSDictionary
    gosubcategory.ArrSubcategory=dicsubcat.object(forKey:"subcategory") as! NSArray
    navigationController?.pushViewController(gosubcategory, animated: true)
}

}