Send SMS with Twilio in Swift

Question

I try to use Twilio as an service provider but they have no examples for Swift that I understand.

My task is to send SMS to a number using Twilio API with Swift.

I have a Twilio.com account - and that one is working. But how do I do this in Swift code in a easy manner.

Twilio does provide a library - but that is meant for C# not for Swift (and using a bridging header seems too complicated!)

Here is the C# example, I need a easy Swift example.

// Download the twilio-csharp library from twilio.com/docs/csharp/install
using System;
using Twilio;
class Example 
{
  static void Main(string[] args) 
  {
    // Find your Account Sid and Auth Token at twilio.com/user/account
    string AccountSid = "AC5ef8732a3c49700934481addd5ce1659";
    string AuthToken = "{{ auth_token }}";
    var twilio = new TwilioRestClient(AccountSid, AuthToken);


    var message = twilio.SendMessage("+14158141829", "+15558675309", "Jenny please?! I love you <3", new string[] {"http://www.example.com/hearts.png"});

    Console.WriteLine(message.Sid);
  }
}

Answer 1

Twilio evangelist here.

To send a text message from Swift you can just make a request directly to Twilios REST API. That said, I would not recommend doing this from an iOS app (or any other client app) as it requires you to embed your Twilio account credentials in the app, which is dangerous. I would instead recommend sending the SMS from a server side application.

If you do want to send the message from your app, there are a couple of Swift libraries I know of that simplify making HTTP requests:

• Alamofire - from Mattt Thompson, creator of AFNetworking - used in the example here: https://www.twilio.com/blog/2016/11/how-to-send-an-sms-from-ios-in-swift.html
• SwiftRequest - from Ricky Robinett of Twilio

To make the request using SwiftRequest, it would look like this:

var swiftRequest = SwiftRequest();

var data = [
    "To" : "+15555555555",
    "From" : "+15555556666",
    "Body" : "Hello World"
];

swiftRequest.post("https://api.twilio.com/2010-04-01/Accounts/[YOUR_ACCOUNT_SID]/Messages", 
    auth: ["username" : "[YOUR_ACCOUNT_SID]", "password" : "YOUR_AUTH_TOKEN"]
    data: data, 
    callback: {err, response, body in
        if err == nil {
            println("Success: \(response)")
        } else {
            println("Error: \(err)")
        }
});

Hope that helps.

Answer 2

recently I have gone through Twilio docs and few SO post.

you can send SMS with following code snip in Swift 2.0

func sendSMS()
    {

        let twilioSID = "your Sender ID here"
        let twilioSecret = "your token id here"

        //Note replace + = %2B , for To and From phone number
        let fromNumber = "%2B14806794445"// actual number is +14803606445
        let toNumber = "%2B919152346132"// actual number is +919152346132
        let message = "Your verification code is 2212 for signup with <app name here> "

        // Build the request
        let request = NSMutableURLRequest(URL: NSURL(string:"https://\(twilioSID):\(twilioSecret)@api.twilio.com/2010-04-01/Accounts/\(twilioSID)/SMS/Messages")!)
        request.HTTPMethod = "POST"
        request.HTTPBody = "From=\(fromNumber)&To=\(toNumber)&Body=\(message)".dataUsingEncoding(NSUTF8StringEncoding)

        // Build the completion block and send the request
        NSURLSession.sharedSession().dataTaskWithRequest(request, completionHandler: { (data, response, error) in
            print("Finished")
            if let data = data, responseDetails = NSString(data: data, encoding: NSUTF8StringEncoding) {
                // Success
                print("Response: \(responseDetails)")
            } else {
                // Failure
                print("Error: \(error)")
            }
        }).resume()
}

if everything goes fine..You should receive message like this..