.swift

private func displayInvoice(name :String, deliveryLocation :CLPlacemark) -> CGSize {
        
        self.invoiceView.coffeeNameLabel.text = name
        self.invoiceView.deliveryLocationLabel.text = deliveryLocation.name
        
        self.view.addSubview(self.invoiceView)
        
        let width = self.extensionContext?.hostedViewMaximumAllowedSize.width ?? 320
        let frame = CGRect(origin: .zero, size: CGSize(width: width, height: 170))
        
        self.invoiceView.frame = frame
        
        return frame.size
        
    }