How to open WhatsApp from Swift app?

Question

I am using webview for my Swift app and I have \"Share on WhatsApp\" button on my website which works fine on a browser. But on iPhone app, when I click on the butt

Answer 1

UIApplication.shared.openURL(URL(string:"https://api.whatsapp.com/send?phone=phoneNumber")!)

phoneNumber might be with (+) or not.

phoneNumber looks like 99455555555 or +99455555555