Getting API Data within Swift

Question

I'm trying to get some data from an API at the address https://api.coinmarketcap.com/v1/ticker/bitcoin/?convert=AUD

I've started a new playground within Xcode, and my code is as follows

let urlString = "https://api.coinmarketcap.com/v1/ticker/bitcoin/?convert=AUD"

let url = URL(string: urlString)
URLSession.shared.dataTask(with:url!) { (data, response, error) in
    if error != nil {
        print(error as Any)
    } else {
        do {
            
            let parsedData = try JSONSerialization.jsonObject(with: data!) as! [String:Any]
            let id = parsedData["id"] as! [String:Any]
            
            print(id)
            
        } catch let error as NSError {
            print(error)
        }
    }
    
    }.resume()

However the playground is returning no result. I am quite new to Swift, so some of the syntax may be a little off. Can anyone make a suggestion how to obtain the information obtained at the API address?

Rendel · Accepted Answer · 2017-09-30 12:15:02Z

You need to import PlaygroundSupport and set needsIndefiniteExecution to true.
Also you have some errors in the code as the result is array and you are casting it into a dictionary [String : Any].
Use the following code:

import UIKit
import PlaygroundSupport

PlaygroundPage.current.needsIndefiniteExecution = true

let urlString = "https://api.coinmarketcap.com/v1/ticker/bitcoin/?convert=AUD"

let url = URL(string: urlString)
URLSession.shared.dataTask(with:url!) { (data, response, error) in
    if error != nil {
        print(error!.localizedDescription)
    } else {
        do {

            let parsedData = try JSONSerialization.jsonObject(with: data!) as! [[String : Any]]
            for item in parsedData
            {
                let id = item["id"] as! String
                print(id)
            }

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

    }.resume()

jane doe · Accepted Answer · 2023-11-22 05:46:32Z

-2

extension ViewController {
func getApi() {
    
    let url = URL(string: getApiUrl)!
    let request = URLRequest(url: url)
    
    let session = URLSession.shared
    let task = session.dataTask(with: request) { (data, response, error) in
        
        if let error = error {
            
            print(error)
        } else if let data = data {
            
            do {
                let decoder = JSONDecoder()
                let response = try decoder.decode(Birthday.self, from: data)
                print(response)
                 print(response.name)
                
                DispatchQueue.main.async {
                    
                    self.getApiUrl = response
                    
                }
                }
            } catch {
                print(error)
            }
            
        } else {
            print("something went wrong")
        }
    }
    
    task.resume()
}

}

answered Nov 22, 2023 at 5:46

jane doe

1

1 Comment

Community Over a year ago

As it’s currently written, your answer is unclear. Please edit to add additional details that will help others understand how this addresses the question asked. You can find more information on how to write good answers in the help center.

jane doe · Accepted Answer · 2023-11-23 06:50:27Z

extension ViewController {
func userDetail() {
    let url = URL(string: getApiUrl)!
    let session = URLSession.shared
    var request = URLRequest(url: url)
    request.setValue( "Bearer \(userToken)", forHTTPHeaderField: "Authorization")
    let task = session.dataTask(with: request) { (data, response, error) in
        if let error = error {
            print (error)
        } else if let data = data {
            do {
                let decoder = JSONDecoder()
                let responseDatas = try decoder.decode(InstaStory.self, from: data)
                DispatchQueue.main.async {
                    self.datas = responseDatas.data.tagPost
                    self.collectionView.reloadData()
                }
            } catch {
                print(error)
            }
        } else {
            print("something went wrong")
        }
    }
    task.resume()
}}

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