private static Task <PopupAction> CreateAlert(UIAlertControllerStyle alertStyle, string title, string message, IEnumerable <PopupAction> actions)
{
var tcs = new TaskCompletionSource <PopupAction>();
var vc = UIApplication.SharedApplication.KeyWindow.RootViewController;
while (vc.PresentedViewController != null)
{
vc = vc.PresentedViewController;
}
var alert = UIAlertController.Create(title, message, alertStyle);
foreach (var action in actions)
{
if (action.IsDefault && action.IsCancel)
{
throw new InvalidOperationException();
}
var style = action.IsCancel ? UIAlertActionStyle.Cancel
: (action.IsDefault ? UIAlertActionStyle.Default : UIAlertActionStyle.Destructive);
alert.AddAction(UIAlertAction.Create(action.Text, style, a =>
{
try
{
action?.Command?.Execute(action.CommandParameter);
tcs.TrySetResult(action);
}
catch (Exception e)
{
tcs.SetException(e);
}
}));
}
//if (alert.PopoverPresentationController != null)
// alert.PopoverPresentationController.BarButtonItem = myItem;
vc.PresentViewController(alert, animated: true, completionHandler: null);
return(tcs.Task);
}
/// <summary>
/// Displays an error message
/// </summary>
/// <param name="title">Title, which is shown most prominently</param>
/// <param name="message">Message, which is shown beneath the title</param>
/// <param name="sourceView">If not null, the message is shown as a popover originating from this view</param>
/// <param name="completion">Action to take after user acknowledges the error</param>
private void ShowError(string title, string message, UIView sourceView = null, Action completion = null)
{
UIAlertControllerStyle preferredStyle = sourceView == null ? UIAlertControllerStyle.Alert : UIAlertControllerStyle.ActionSheet;
// Create a new Alert Controller
UIAlertController actionSheetAlert = UIAlertController.Create(title, message, preferredStyle);
// Add Actions
actionSheetAlert.AddAction(UIAlertAction.Create("OkAlertActionButtonText".Localize(), UIAlertActionStyle.Default, (value) => completion()));
if (sourceView != null)
{
// Required for iPad - You must specify a source for the Action Sheet since it is displayed as a popover
UIPopoverPresentationController presentationPopover = actionSheetAlert.PopoverPresentationController;
if (presentationPopover != null)
{
presentationPopover.SourceView = sourceView;
presentationPopover.PermittedArrowDirections = UIPopoverArrowDirection.Any;
}
}
// Display the alert
PresentViewController(actionSheetAlert, true, null);
}
public UIAlertController([Optional] string title, [Optional] string message, UIAlertControllerStyle preferredStyle)
{
}
public SupportRotationAlertController(string?title, string?message, UIAlertControllerStyle controllerStyle)
{
Title = title;
Message = message;
PreferredStyle = controllerStyle;
}
