Getting NSError domain: “com.google.GTLJSONRPCErrorDomain” while fetching Google Calendar events in Swift

Question

I am trying to fetch Calendar events to my iOS application. So, for that I have create a project in Google developers console and got Client ID, ApiKey.

And installe

Answer 1

Swift - 4

I doesn't recognise why you are getting that error. I think you are not using latest pods. Refer following code, that I have used for fetch google calendar events.

Pods: - pod 'GoogleAPIClientForREST/Calendar', '~> 1.2.1'

pod 'Google/SignIn', '~> 3.0.3'

import UIKit
import GoogleAPIClientForREST
import GoogleSignIn
class ClassForCalEvent: UIViewController, GIDSignInDelegate, GIDSignInUIDelegate {

    let eventArray = NSMutableArray()
    private let scopes = [kGTLRAuthScopeCalendar]

    private let service = GTLRCalendarService()
    override func viewDidLoad() {
        super.viewDidLoad()

          // Configure Google Sign-in.
            GIDSignIn.sharedInstance().delegate = self
            GIDSignIn.sharedInstance().uiDelegate = self
            GIDSignIn.sharedInstance().scopes = scopes
            GIDSignIn.sharedInstance().signIn()

    }

func sign(_ signIn: GIDSignIn!, didSignInFor user: GIDGoogleUser!,
              withError error: Error!) {
        if let error = error {
            showAlert(title: "Authentication Error", message: error.localizedDescription)
            self.service.authorizer = nil
        } else {
                        self.service.authorizer = user.authentication.fetcherAuthorizer()
            fetchEvents()
        }
    }

    // Construct a query and get a list of upcoming events from the user calendar
    func fetchEvents() {
        let query = GTLRCalendarQuery_EventsList.query(withCalendarId: "primary")
        query.maxResults = 10
        query.timeMin = GTLRDateTime(date: Date())
        query.singleEvents = true
        query.orderBy = kGTLRCalendarOrderByStartTime
        service.executeQuery(
            query,
            delegate: self,
            didFinish: #selector(displayResultWithTicket(ticket:finishedWithObject:error:)))
    }

    // Display the start dates and event summaries in the UITextView
    @objc func displayResultWithTicket(
        ticket: GTLRServiceTicket,
        finishedWithObject response : GTLRCalendar_Events,
        error : NSError?) {

        if let error = error {
            showAlert(title: "Error", message: error.localizedDescription)
            return
        }

        var outputText = ""
        if let events = response.items, !events.isEmpty {
            for event in events {
                let start = event.start!.dateTime ?? event.start!.date!
                let startString = DateFormatter.localizedString(
                    from: start.date,
                    dateStyle: .short,
                    timeStyle: .short)

                let dataDic = ["start_Time":startString , "tag":"red", "Event_Name":event.summary!] 
                eventArray.add(dataDic)

                outputText += "\(startString) - \(event.summary!)\n"
                print("Output ", startString , event )
            }
            UserDefaults.standard.set(NSKeyedArchiver.archivedData(withRootObject: eventArray), forKey: "EventArray")

            UserDefaults.standard.synchronize()
        } else
        {
            outputText = "No upcoming events found."
        }
        print("Output Text",outputText)
        showAlert(title: "Event Sync Succesfully!", message:"")
    }