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

For Swift 4.2+ and iOS 9+

Method 1: (launches WhatsApp application if is installed)

let phoneNumber =  "+989160000000" // you need to change this number
let appURL = URL(string: "https://api.whatsapp.com/send?phone=\(phoneNumber)")!
if UIApplication.shared.canOpenURL(appURL) {
    if #available(iOS 10.0, *) {
        UIApplication.shared.open(appURL, options: [:], completionHandler: nil)
    }
    else {
        UIApplication.shared.openURL(appURL)
    }
} else {
    // WhatsApp is not installed
}

Method 2:(open WhatsApp short-link web page using safari)

let phoneNumber =  "+989160000000" // you need to change this number
let appURL = URL(string: "https://wa.me/\(phoneNumber)")!
if UIApplication.shared.canOpenURL(appURL) {
    if #available(iOS 10.0, *) {
        UIApplication.shared.open(appURL, options: [:], completionHandler: nil)
    } else {
        UIApplication.shared.openURL(appURL)
    }
}

Method 3: if WhatsApp is installed launch app, otherwise open short-link in safari.(combine method 1 and 2)

Note : '+' in phone number is OK.