Firebase动态链接在WhatsApp中共享时不显示图像

Question

我正在共享我的应用程序中的firebase动态链接，该链接包含图像，描述和URL。当我直接在Twitter，Facebook，Messenger上共享或与UIActivityViewController共享时，它将显示图像，描述，URL。但是，当我在Whatsapp上共享相同的链接时，它将仅显示url，描述而不显示图像。

fileprivate func shareLinkOnWhatsapp(url : URL){
    let urString = url.absoluteString
    let urlStringEncoded = urString.addingPercentEncoding(withAllowedCharacters: NSCharacterSet.urlQueryAllowed)
    let url  = URL(string: "whatsapp://send?text=\(urlStringEncoded!)")

    if UIApplication.shared.canOpenURL(url!) {
        UIApplication.shared.open(url!, options: [:]) { (success) in
            if success {
                print("WhatsApp accessed successfully")
            } else {
                print("Error accessing WhatsApp")
            }
        }
    }
}