UIActivityIndicatorView not showing in webview - ios

Question

I have a UINavigationController that I am adding a UIViewController to. Inside my UIViewController I have a webview and also trying to set a UIActivityIndicatorView. However I can't seem to get the UIActivityIndicatorView to show up. Any help would be great!
class TestWebViewController: UIViewController {
var loadSpinner: UIActivityIndicatorView!
var webView: UIWebView!
var title: String?
init(title: String?) {
self.title = title
self.webView = UIWebView(frame: CGRect.zero)
super.init(nibName: nil, bundle: nil)
commonInit()
}
func commonInit() {
loadSpinner = UIActivityIndicatorView(activityIndicatorStyle: .gray)
loadSpinner.center = webView.center
view.addSubview(loadSpinner)
webView.delegate = self
view = webView
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
UINavigationController(rootViewController: testWebViewController)
Even when I try to add the loadSpinner to the webView it does not appear webView.addSubview(loadSpinner)

Answer 1

Result:
Code:
class ViewController: UIViewController {
var loadSpinner: UIActivityIndicatorView!
var webView: UIWebView!
override func viewDidLoad() {
super.viewDidLoad()
self.webView = UIWebView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
loadSpinner = UIActivityIndicatorView(activityIndicatorStyle: .gray)
webView.addSubview(loadSpinner)
view = webView
loadSpinner.startAnimating()
}
override func viewDidLayoutSubviews() {
loadSpinner.center = webView.center
}
}

Answer 2

Your primary issue is that you first add the activity indicator to the view controller's view but two lines later you replace the view controller's view with the web view.
If you are going to replace the view controller's view you should do that in loadView. You should also setup other views in viewDidLoad, not in an init method.
The simplest change is to get rid of your commonInit method and put all of that code in viewDidLoad. Then in viewDidLoad, setup the web view first, then setup the activity indicator.
class TestWebViewController: UIViewController {
var loadSpinner: UIActivityIndicatorView!
var webView: UIWebView!
var title: String?
init(title: String?) {
self.title = title
super.init(nibName: nil, bundle: nil)
}
override func loadView() {
// don't call super
webView = UIWebView(frame: CGRect.zero)
webView.delegate = self
view = webView
}
override func viewDidLoad() {
super.viewDidLoad()
loadSpinner = UIActivityIndicatorView(activityIndicatorStyle: .gray)
loadSpinner.center = view.center
// Keep it in the center
loadSpinner.autoresizingMask = [.flexibleWidth, .flexibleLeftMargin, .flexibleRightMargin]
view.addSubview(loadSpinner)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
You also have an issue with title. UIViewController already has a title property. You should not add your own.

Answer 3

You need to refactor your code like this inside viewDidLoad
class TestWebViewController: UIViewController {
var loadSpinner: UIActivityIndicatorView!
var webView: UIWebView!
var title: String?
override func viewDidLoad()
{
super.viewDidLoad()
webView = UIWebView(frame:self.view.frame)
webView.delegate = self
self.view.addSubview(webview)
loadSpinner = UIActivityIndicatorView(activityIndicatorStyle: .gray)
self.view.addSubview(loadSpinner)
loadSpinner.center = self.view.center
loadSpinner.startAnimating()
}
}