I created a popup alert using alert controller and added two alert actions(ok and cancel) as below.
UIAlertController * alert= [UIAlertController
Try this code I got from here: http://useyourloaf.com/blog/2014/09/05/uialertcontroller-changes-in-ios-8.html
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Title", message:@"Message", preferredStyle:UIAlertControllerStyleAlert];
[alertController addTextFieldWithConfigurationHandler:^(UITextField *textField) {
textField.placeholder = NSLocalizedString(@"LoginPlaceholder", @"Login");
}];
Then show it.