Using NVActivityIndicatorView with Timer, it shows short time

Question

I used NVActivityIndicatorView to create a loading page and turn over the tab screen for 5 seconds.

ActivityIndicatorView is short-lived and disappears quickly. Using a timer, I made an event happen in five seconds. Timer.scheduledTimer()used DispatchQueue.main.async{}. I thought it runs main thread. I changed timeInterval, and it didn't change.

   DispatchQueue.main.async {

          self.timer = Timer.scheduledTimer(timeInterval: 5.0, target: self, selector: #selector(self.timerAction), userInfo: nil, repeats: true)
          self.performLogin()
     }

Code

import UIKit
import NVActivityIndicatorView

class AutoLoginViewController: UIViewController, NVActivityIndicatorViewable {

    var timer: Timer?
    var indicatorView: NVActivityIndicatorView!

    override func viewDidLoad() {
        super.viewDidLoad()
        setup()

        getToken(username: "yoshimi", password: "11111")

    }


    override func viewWillDisappear(_ animated: Bool) {
        stopIndicator()
    }
    // MARK: - Setup
    private func setup() {
        var midY = self.view.frame.height / 2
        var midX = self.view.frame.width / 2
        let frame = CGRect(x: midX, y: midY, width: 30, height: 30)

        indicatorView = NVActivityIndicatorView(frame: frame,
                                                    type: .ballScaleRippleMultiple)
        indicatorView?.tintColor = .white

    }

    // MARK: - Segue
    private func performLogin() {

        guard
             let tabBarController = R.storyboard.main.ramAnimatedTabBarController(),
             let mainViewController = tabBarController.viewControllers?.first as? MainViewController

        else {
              return
        }

      self.present(tabBarController, animated: true, completion: nil)

    }
    // MARK: - run indicator

    @objc func timerAction() {

        let size = CGSize(width: 30, height: 30)
        UIView.animate(withDuration: 5.0) {
            self.indicatorView.startAnimating()
            self.startAnimating(size,message: "Loading...", type: .ballScaleRippleMultiple, fadeInAnimation: nil)
        }
          timer?.invalidate()
      }

    private func stopIndicator() {

        self.indicatorView.stopAnimating()
        self.stopAnimating(nil)

    }

    // MARK: - APIs
    private func getToken(username: String?, password: String?) {
        guard
            let username = username,
            let password = password
        else {
            return
        }

        API.LoginClass.getToken(username: username, password: password) { (token, success) in
            guard success, let token = token else {
                self.loginError()
                return
            }

            Configure.token = token
            self.login(username: username, password: password)
        }



        DispatchQueue.main.async {

          self.timer = Timer.scheduledTimer(timeInterval: 5.0, target: self, selector: #selector(self.timerAction), userInfo: nil, repeats: true)
          self.performLogin()
     }

    }
}

Any specific reason to use timer?, I think there is no use of timer when you want to show loader. — Dhaval Patel
– Dhaval Patel, Commented Feb 6, 2020 at 5:38
Server didn't set up. I can't connect network access I thought timer is good for working ActivityIndicatorView. — Sunmi
– Sunmi, Commented Feb 6, 2020 at 6:00

Tanjima Kothiya · Accepted Answer · 2020-02-06 05:41:26Z

0

You can try this

self.timer = Timer.scheduledTimer(timeInterval: 5.0, target: self, selector: #selector(self.timerAction), userInfo: nil, repeats: true)

     DispatchQueue.main.async {

             self.performLogin()
     }

answered Feb 6, 2020 at 5:41

Tanjima Kothiya

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2 Comments

Sunmi Over a year ago

VC shows like gph.is/g/Zd715Ow. It changed tabbarcontroller. It shows lately.

Tanjima Kothiya Over a year ago

@Sunmi set performLogin() in the timer?.invalidate()

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