Xamarin iOS: Implementing a method that returns value from UIAlertView dialog

Question

I need to implement a method that returns user input that is received from UIAlertView.

This is what I did so far:

It returns initial value of string, no matter what the user enters text. Any ideas?

    private string GetUserInput()
    {
        string userInput = string.Empty;

        UIAlertView alert = new UIAlertView();
        alert.Title = "What is your favourite movie?";
        alert.AddButton("OK");
        alert.AddButton("Cancel");
        alert.AlertViewStyle = UIAlertViewStyle.PlainTextInput;
        alert.Clicked += (object s, UIButtonEventArgs ev) =>
        {
            if (ev.ButtonIndex != 0) return;

            userInput = alert.GetTextField(0).Text;

        };

        alert.Show();

        return userInput;
    }

SOLUTION:

I found the solution. I put it below in case of somebody needs it.

string userInput = await Methods.ShowAlert("What is your favourite movie?", "", "OK", "Cancel");

ShowAlert Method:

public static Task<string> ShowAlert(string title, string message,params string[] buttons)
{
    var tcs = new TaskCompletionSource<string>();
    var alert = new UIAlertView
    {
        Title = title,
        Message = message,
        AlertViewStyle = UIAlertViewStyle.PlainTextInput

    };

    foreach (var button in buttons)
        alert.AddButton(button);

    alert.Clicked += (s, e) =>
    {
        if (e.ButtonIndex != 0) return;
        tcs.TrySetResult(alert.GetTextField(0).Text);
    };
    alert.Show();

    return tcs.Task;
}

score -1 · Answer 1 · edited Oct 23 '17 at 08:45

-1

var alert = UIAlertController(title: "Alert Title", message: "Alert Message", preferredStyle: UIAlertControllerStyle.Alert)
alert.addTextFieldWithConfigurationHandler(configurationTextField)
alert.addAction(UIAlertAction(title: "Close", style: UIAlertActionStyle.Cancel, handler:handleCancel))
alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler:{ (UIAlertAction)in
    println("User click Ok button")
    println(self.textField.text)
}))
self.presentViewController(alert, animated: true, completion: {
    println("completion block")
})

<!-- end snippet -->

edited Oct 23 '17 at 08:45

Komal12

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answered Oct 23 '17 at 07:45

Hung Cao

1

Thank you for the reply but this not what I am looking for. I need to implement a method that returns user input. Also, I believe this is Objective-C. I am working on Xamarin.iOS. – Omer Oct 23 '17 at 07:57

Xamarin iOS: Implementing a method that returns value from UIAlertView dialog

SOLUTION:

ShowAlert Method:

1 Answers1