gistfile1.txt

-(void)showSignatureBoxFromButton:(UIButton*)fromButton {
    UIStoryboard *sb = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
    PESignatureViewController *vc = [sb instantiateViewControllerWithIdentifier:@"signatureCapture"];
    vc.delegate = self;
    
    UIPopoverController* aPopover = [[UIPopoverController alloc]
                                     initWithContentViewController:vc];
    
    // Store the popover in a custom property for later use.
    self.myPopoverController = aPopover;
    
    [self.myPopoverController presentPopoverFromRect:fromButton.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}