Retrieving information from dictionary in swift version 4

Question

Retrieving information from dictionary in swift version 4

Currently, I am utilizing an API and trying to display its data in a table view.


import UIKit
import Alamofire

class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {

    @IBOutlet weak var tableView: UITableView!
    @IBOutlet weak var mySegmentedControl: UISegmentedControl!

    override func viewDidLoad() {
        super.viewDidLoad()
    
        apiData()
    }

    @IBAction func mySegmentControlTapped(_ sender: Any) {
        tableView.reloadData()
    }

    // Additional code for API implementation, data retrieval, and segmented control handling 

}

class TableCell: UITableViewCell {

    @IBOutlet weak var labelOne: UILabel!
    @IBOutlet weak var labelTwo: UILabel!
    @IBOutlet weak var labelThree: UILabel!
    @IBOutlet weak var labelFour: UILabel!

}

Following this code, I have managed to extract keys and values; however, there seems to be an issue where 6 values are being retrieved under 1 key. How can I effectively store and display all these values within the table view? My approach involves using a segmented controller to dynamically alter the displayed data based on date months, as shown in the image https://i.stack.imgur.com/moqnx.png.

ios json swift dictionary swift4.1

Answer 1

Answer №1

To begin, you can define a custom class to represent the response:

class DateInfo: NSObject {
    var quarter: Int!
    var day: String!
    var month: String!
    var db: String!
    var longDate: String!
    var unixTime: Int!

    init(quarter: Int, day: String, month: String, db: String, longDate: String, unixTime: Int) {
        super.init()

        self.quarter = quarter
        self.day = day
        self.month = month
        self.db = db
        self.longDate= longDate
        self.unixTime = unixTime
    }
}

Next, create an array to hold all the retrieved dates:

var dateList = [DateInfo]()

Update your fetchData method like this:

func fetchData() {
    Alamofire.request("https://api.example.com/get-dates", method: .get, parameters: nil, encoding: URLEncoding.default, headers: nil).responseJSON { (response: DataResponse<Any>) in

        switch(response.result) {
        case .success(_):
            guard let json = response.result.value as? [String: Any] else { return }
            guard let data = json["dates"] as? [String: Any] else { return }

            for (_, value) in data {
                let dateValue = value as! [String: Any]
                let dateInfo = DateInfo(quarter: dateValue["quarter"] as! Int,
                                        day: dateValue["day"] as! String,
                                        month: dateValue["month"] as! String,
                                        db: dateValue["db"] as! String,
                                        longDate: dateValue["long"] as! String,
                                        unixTime: dateValue["unix"] as! Int)

                self.dateList.append(dateInfo)
            }
            print(self.dateList)
            self.tableView.reloadData()
            break
        case .failure(_):
            print(response.result.error as Any)
            break

        }
    }
}

Finally, populate your tableView with the items from the dateList array:

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

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let dateInfo = dateList[indexPath.row]

    let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
    cell.textLabel.text = dateInfo.longDate
    return cell
}

Remember to adjust it based on your specific requirements.

Answer 2

To begin, you can define a custom class to represent the response:

class DateInfo: NSObject {
    var quarter: Int!
    var day: String!
    var month: String!
    var db: String!
    var longDate: String!
    var unixTime: Int!

    init(quarter: Int, day: String, month: String, db: String, longDate: String, unixTime: Int) {
        super.init()

        self.quarter = quarter
        self.day = day
        self.month = month
        self.db = db
        self.longDate= longDate
        self.unixTime = unixTime
    }
}

Next, create an array to hold all the retrieved dates:

var dateList = [DateInfo]()

Update your fetchData method like this:

func fetchData() {
    Alamofire.request("https://api.example.com/get-dates", method: .get, parameters: nil, encoding: URLEncoding.default, headers: nil).responseJSON { (response: DataResponse<Any>) in

        switch(response.result) {
        case .success(_):
            guard let json = response.result.value as? [String: Any] else { return }
            guard let data = json["dates"] as? [String: Any] else { return }

            for (_, value) in data {
                let dateValue = value as! [String: Any]
                let dateInfo = DateInfo(quarter: dateValue["quarter"] as! Int,
                                        day: dateValue["day"] as! String,
                                        month: dateValue["month"] as! String,
                                        db: dateValue["db"] as! String,
                                        longDate: dateValue["long"] as! String,
                                        unixTime: dateValue["unix"] as! Int)

                self.dateList.append(dateInfo)
            }
            print(self.dateList)
            self.tableView.reloadData()
            break
        case .failure(_):
            print(response.result.error as Any)
            break

        }
    }
}

Finally, populate your tableView with the items from the dateList array:

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

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let dateInfo = dateList[indexPath.row]

    let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
    cell.textLabel.text = dateInfo.longDate
    return cell
}

Remember to adjust it based on your specific requirements.

Answer 3

Answer №2

Check out this code snippet:

for (key, value) in data {
    guard let innerDict = value as? [String: Any] else {
        continue
    }

    print(innerDict["day"])

}

If you want to store the data, consider creating a simple class with necessary fields and parsing the response into that class. Then, add all objects into an array and display them in a table view.

class UserData : NSObject {
    var title: String?
    var day: Int?
    var date: Date?
    var month: Int?
    var quarter: Int?

    override init() {
        super.init()
    }
}

// ....

// Parsing function
var userDataArray = [UserData]()
for (key, value) in data {
    guard let innerDict = value as? [String: Any] else {
        continue
    }
    let userObj = UserData()
    userObj.day = innerDict["day"] as? Int
    // Parse other fields here...
    userDataArray.append(userObj)

}

DispatchQueue.main.async {
    self.tableView.reloadData()
}

Answer 4

Check out this code snippet:

for (key, value) in data {
    guard let innerDict = value as? [String: Any] else {
        continue
    }

    print(innerDict["day"])

}

If you want to store the data, consider creating a simple class with necessary fields and parsing the response into that class. Then, add all objects into an array and display them in a table view.

class UserData : NSObject {
    var title: String?
    var day: Int?
    var date: Date?
    var month: Int?
    var quarter: Int?

    override init() {
        super.init()
    }
}

// ....

// Parsing function
var userDataArray = [UserData]()
for (key, value) in data {
    guard let innerDict = value as? [String: Any] else {
        continue
    }
    let userObj = UserData()
    userObj.day = innerDict["day"] as? Int
    // Parse other fields here...
    userDataArray.append(userObj)

}

DispatchQueue.main.async {
    self.tableView.reloadData()
}

Answer 5

Answer №3

Contained within this entity is a dictionary structure, allowing for access to specific elements in the following manner

if let subDict = value as? [String: Any] {
    print(\(subDict["day"]))
    print(\(subDict["db"]))
    ...
}

Answer 6

Contained within this entity is a dictionary structure, allowing for access to specific elements in the following manner

if let subDict = value as? [String: Any] {
    print(\(subDict["day"]))
    print(\(subDict["db"]))
    ...
}

Answer 7

Answer №4

Create a new string array

let jsonData = [String:Any]()

Store some data in it

jsonData = data

Then refresh your tableview

Answer 8

Create a new string array

let jsonData = [String:Any]()

Store some data in it

jsonData = data

Then refresh your tableview

Retrieving information from dictionary in swift version 4

Answer №1

Answer №2

Answer №3

Answer №4

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