UIWebView with Progress Bar

Question

Hi I\'m new to programming and I\'m trying to make my first app for iPhones on Xcode. My app contains of a button which opens a UIWebView when pressed and loads up a homepag

Answer 1

Some of these answers here are not completely correct, since they forgot to register the delegate for the webview. Unfortunately it is not enough to implement UIWebViewDelegate and override the two methods. You also have to set the delegate of the webview to self.

class ViewController: UIViewController,UIWebViewDelegate {

    @IBOutlet weak var webView: UIWebView!
    @IBOutlet weak var activityIndicator: UIActivityIndicatorView!
    @IBOutlet weak var myProgressView: UIProgressView!

    var myTimer = NSTimer()
    var theBool = Bool()

    override func viewDidLoad() {
        super.viewDidLoad()

        let url = NSURL(string: "https://www.youtube.com")
        let request = NSURLRequest(URL: url!)
        activityIndicator.hidesWhenStopped = true
        activityIndicator.startAnimating()

        // !
        webView.delegate = self // <--- important
        // ! 

        webView.loadRequest(request)

    }

    func timerCallback(){
        if theBool {
            if myProgressView.progress >= 1 {
                myProgressView.hidden = true
                myTimer.invalidate()
            }else{
                myProgressView.progress += 0.1
            }
        }else{
            myProgressView.progress += 0.05
            if myProgressView.progress >= 0.95 {
                myProgressView.progress = 0.95
            }
        }
    }

    func webViewDidStartLoad(webView: UIWebView) {
        activityIndicator.startAnimating()
        myProgressView.progress = 0
        theBool = false
        myTimer =  NSTimer.scheduledTimerWithTimeInterval(0.01667,target: self,selector: #selector(ViewController.timerCallback),userInfo: nil,repeats: true)
    }

    func webViewDidFinishLoad(webView: UIWebView) {
        activityIndicator.stopAnimating()
        theBool = true
    } 
}

This code refers to the answer @ZAFAR007