/// <summary>
/// Shows an alert with Textfields.
/// For iOS 7 or before, an alert with a Textfield will be shown.
/// </summary>
/// <param name="title">The title of the alert.</param>
/// <param name="message">Message to show to user.</param>
/// <param name="fromViewController">From which view the alert will be presented.</param>
/// <param name="okTitle">Title for Ok button.</param>
/// <param name="placeholders">
/// Placeholders to be shown in textfields. A Textfield will be added for each placeholder
/// If null or an empty array is passed, a simple alert will be shown.
/// </param>
/// <param name="result">
/// Action to be done when user press one button of alert.
/// Will return all inputs from Textfields in order that were shown or null if Cancel button was tapped.
/// </param>
public static void ShowMessage(string title, string message, UIViewController fromViewController,
string okTitle, string [] placeholders, UIAlertControllerTextFieldResultHandler result)
{
if (string.IsNullOrWhiteSpace(okTitle))
{
okTitle = "Ok";
}
if (placeholders == null || placeholders.Length == 0)
{
ShowMessage(title, message, fromViewController, okTitle);
return;
}
var alert = UIAlertController.Create(title, message, UIAlertControllerStyle.Alert);
foreach (var placeholder in placeholders)
{
alert.AddTextField((textField) => {
textField.Placeholder = placeholder;
textField.TextAlignment = UITextAlignment.Center;
});
}
alert.AddAction(UIAlertAction.Create(okTitle, UIAlertActionStyle.Default, (obj) => {
var textfields = alert.TextFields;
var inputs = new string [textfields.Length];
for (int i = 0; i < textfields.Length; i++)
{
inputs [i] = textfields [i].Text;
}
result?.Invoke(false, inputs);
}));
alert.AddAction(UIAlertAction.Create("Cancel", UIAlertActionStyle.Cancel, (obj) => {
result?.Invoke(true, null);
}));
fromViewController.PresentViewController(alert, true, null);
}
/// <summary>
/// Shows an alert with Textfields.
/// For iOS 7 or before, an alert with a Textfield will be shown.
/// </summary>
/// <param name="title">The title of the alert.</param>
/// <param name="message">Message to show to user.</param>
/// <param name="fromViewController">From which view the alert will be presented.</param>
/// <param name="okTitle">Title for Ok button.</param>
/// <param name="placeholders">
/// Placeholders to be shown in textfields. A Textfield will be added for each placeholder
/// If null or an empty array is passed, a simple alert will be shown.
/// </param>
/// <param name="result">
/// Action to be done when user press one button of alert.
/// Will return all inputs from Textfields in order that were shown or null if Cancel button was tapped.
/// </param>
public static void ShowMessage(string title, string message, UIViewController fromViewController,
string okTitle, string [] placeholders, UIAlertControllerTextFieldResultHandler result)
{
if (string.IsNullOrWhiteSpace(okTitle))
{
okTitle = "Ok";
}
if (placeholders == null || placeholders.Length == 0)
{
ShowMessage(title, message, fromViewController, okTitle);
return;
}
if (UIDevice.CurrentDevice.CheckSystemVersion(8, 0))
{
var alert = UIAlertController.Create(title, message, UIAlertControllerStyle.Alert);
foreach (var placeholder in placeholders)
{
alert.AddTextField((textField) => {
textField.Placeholder = placeholder;
textField.TextAlignment = UITextAlignment.Center;
});
}
alert.AddAction(UIAlertAction.Create(okTitle, UIAlertActionStyle.Default, (obj) => {
var textfields = alert.TextFields;
var inputs = new string [textfields.Length];
for (int i = 0; i < textfields.Length; i++)
{
inputs [i] = textfields [i].Text;
}
result?.Invoke(false, inputs);
}));
alert.AddAction(UIAlertAction.Create("Cancel", UIAlertActionStyle.Cancel, (obj) => {
result?.Invoke(true, null);
}));
fromViewController.PresentViewController(alert, true, null);
}
else
{
var alert = new UIAlertView(title, message, null, "Cancel", okTitle)
{
AlertViewStyle = UIAlertViewStyle.PlainTextInput
};
alert.Dismissed += (sender, e) => {
var buttonIndex = (nint)e.ButtonIndex;
if (buttonIndex == 0)
{
result?.Invoke(true, null);
}
else
{
var value = (sender as UIAlertView).GetTextField(0).Text;
result?.Invoke(false, new [] { value });
}
};
alert.Show();
}
}
