How to get the JSON value from Alarmofire and popup in tabular format?

Question

I want to get the value from the API in swift and display the response in Controller. I have created the table and I am getting the response from API using Alarmofire. My Question is How to use the Success response of Alarmofire and display in Array. My code is here :

 class NotificationHistory : UIViewController, UITableViewDelegate,UITableViewDataSource {

let urlStringChecking = "http://www.XXXXXXXX.com/uhf/getnotification.php"

func GetNotificationHistory(completionHandler: @escaping (AnyObject?, NSError?) -> ()) {
    getNotifiction(completionHandler: completionHandler)
}

func getNotifiction(completionHandler: @escaping (AnyObject?, NSError?) -> ()){
    Alamofire.request(urlStringChecking,method: .get)
        .responseJSON{ response in
        switch response.result{
        case .success:
            let list = response.result.value;
            completionHandler(list as AnyObject, nil)
        case .failure( _):
            print(response.result.error as Any)
        }
    }
}


let list = self.GetNotificationHistory(); // If I get success list here then my problem is solved but I am getting an error.

ERROR: Value of type '(NotificationHistory) -> () -> (NotificationHistory)' has no member 'list'

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return(list.count)
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    let reuseIdentifier = "NotificationCell"
    var cell:UITableViewCell? = tableView.dequeueReusableCell(withIdentifier: reuseIdentifier) as UITableViewCell?
    if (cell == nil) {
        cell = UITableViewCell(style: UITableViewCellStyle.subtitle, reuseIdentifier: reuseIdentifier)
    }
    cell?.textLabel?.numberOfLines = 0
    cell!.textLabel?.text = list[indexPath.row]
    cell!.detailTextLabel?.text = list[indexPath.row]
    return cell!
}


override func viewDidLoad(){
    super.viewDidLoad()
    print("Notification History Loaded")
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}
 }

I am very new to Swift. Thanks

Answer 1

To handle json data use SwiftyJSON install this third party library using cocoapods

First declare your list as variable inside NotificationHistory class as

var list = [[String: AnyObject]]()

Add this code to your completion handler getNotifiction now your code look like this

func getNotifiction(completionHandler: @escaping (AnyObject?, NSError?) -> ()){
        Alamofire.request(urlStringChecking,method: .get)
            .responseJSON{ response in
                switch response.result{
                case .success:
                    if ((response.result.value) != nil){
                        let jsonData = JSON(response.result.value!)

                        if let mydata = jsonData["list"].arrayObject {
                            self.list = mydata as! [[String: AnyObject]]
                        }
                        self.tableView.reloadData()

                        completionHandler(self.list, nil) 
                    }
                case .failure( _):
                    print(response.result.error as Any)
                }
        }
    }

And to call this function write self.GetNotificationHistory() inside your viewDidLoad()

This time we have proper data in list variable, now it's time to implement new code in tableview

No need to change here

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return list.count
}

Need some changes in your code

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    let reuseIdentifier = "NotificationCell"

    let newListValue = list[indexPath.row] // assign new values in diff variable

    var cell:UITableViewCell? = tableView.dequeueReusableCell(withIdentifier: reuseIdentifier) as UITableViewCell?
    if (cell == nil) {
        cell = UITableViewCell(style: UITableViewCellStyle.subtitle, reuseIdentifier: reuseIdentifier)
    }
    cell?.textLabel?.numberOfLines = 0
    cell!.textLabel?.text = newListValue[indexPath.row] as? String
    cell!.detailTextLabel?.text = newListValue[indexPath.row] as? String
    return cell!
}

response.result.value contain simple array to treat it as JSON we can either use it as

response.result.value as? [[String:String]]

or your can use SwiftyJSON

: D