小盒子的星空

1.單純顯示訊息：

new UIAlertView("", "訊息內容", null, "OK", null).Show();

2. 有選項的訊息

var Confirm = new UIAlertView("Confirmation", "Would you like to exit app ?", null, "Yes", "No");
Confirm.Show();
Confirm.Clicked += (object senders, UIButtonEventArgs es) =>
{
    if (es.ButtonIndex == 0)
    {
        NSThread.Exit();
    }
    else
    {
        this.NavigationController.PopViewController(true);
    }
};