How can I canter RMUniversalActionSheet on iPad?

[PankajGaikar]

So for my implementation is as below.

[self showActionSheetWithTitle:@"My View"
                       message:nil
             cancelButtonTitle:@"Cancel"
        destructiveButtonTitle:nil
             otherButtonTitles:@[@"A", @"B", @"C"]
popoverPresentationControllerBlock:^(RMPopoverPresentationController *popover){
    popover.sourceView = self.view;
popover.sourceRect = self.view.frame;
}
                      tapBlock:^(RMUniversalAlert * _Nonnull alert, NSInteger buttonIndex)
 {
        //Handling code goes here
 }];

Which I know absolutely wrong. So I want to ask you that is it possible to center RMUniversalActionSheet? If yes, what will be the values that I have to provide for popover.sourceView and popover.sourceRect?