Twitter Login in iOS App using swift 4.

Most of the time we provide the social login in app that will help user to login in app fast & smooth .

Here i have taken example of Twitter .

1: First try to follow this steps and add their SDK in App.

https://github.com/twitter/twitter-kit-ios/wiki/Installation

2: After that Go to Appdelgate.swift file and add this:

 func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

TWTRTwitter.sharedInstance().start(withConsumerKey:"xxxxxxxxxxxxxxxxxxxxx", consumerSecret:"ssabdavhjdafvdhjavdhjavdahjdvahdvahdvahjd")
}

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

TWTRTwitter.sharedInstance().start(withConsumerKey:"xxxxxxxxxxxxxxxxxxxxx", consumerSecret:"ssabdavhjdafvdhjavdhjavdahjdvahdvahdvahjd")

}

Now add this method also in Appdelegate.swift file.

 func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any]) -> Bool {
        var valueTwitter: Bool = true
        
 
        
        valueTwitter =  TWTRTwitter.sharedInstance().application(app, open: url, options: options)
        
        
        return valueFacebook
    }
    
    func application(_ application: UIApplication, shouldAllowExtensionPointIdentifier extensionPointIdentifier: UIApplicationExtensionPointIdentifier) -> Bool {
        if (extensionPointIdentifier == UIApplicationExtensionPointIdentifier.keyboard) {
            return false
        }
        return true
    }
    
   
    
    func application(_ application: UIApplication,
                     open url: URL, sourceApplication: String?, annotation: Any) -> Bool {
        var handle: Bool = true
        
        
        let options: [String: AnyObject] = [UIApplicationOpenURLOptionsKey.sourceApplication.rawValue: sourceApplication as AnyObject, UIApplicationOpenURLOptionsKey.annotation.rawValue: annotation as AnyObject]
        
        handle = TWTRTwitter.sharedInstance().application(application, open: url, options: options)
        
        
        
        return handle
    }

func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any]) -> Bool {

var valueTwitter: Bool = true

valueTwitter = TWTRTwitter.sharedInstance().application(app, open: url, options: options)

return valueFacebook

}

func application(_ application: UIApplication, shouldAllowExtensionPointIdentifier extensionPointIdentifier: UIApplicationExtensionPointIdentifier) -> Bool {

if (extensionPointIdentifier == UIApplicationExtensionPointIdentifier.keyboard) {

return false

}

return true

}

func application(_ application: UIApplication,

open url: URL, sourceApplication: String?, annotation: Any) -> Bool {

var handle: Bool = true

let options: [String: AnyObject] = [UIApplicationOpenURLOptionsKey.sourceApplication.rawValue: sourceApplication as AnyObject, UIApplicationOpenURLOptionsKey.annotation.rawValue: annotation as AnyObject]

handle = TWTRTwitter.sharedInstance().application(application, open: url, options: options)

return handle

}

3: Now write the code that will fetch user email & Name .

for this:

 @IBAction func tapTwitter_btn(_ sender: Any) {
    
        
        TWTRTwitter.sharedInstance().logIn { (session, error) in
            if (session != nil) {
                self.firstName = session?.userName ?? ""
                self.lastName = session?.userName ?? ""
                let client = TWTRAPIClient.withCurrentUser()
                client.requestEmail { email, error in
                    if (email != nil) {
                        print("signed in as \(String(describing: session?.userName))");
                        let firstName = session?.userName ?? ""   // received first name
                        let lastName = session?.userName ?? ""  // received last name
                        let recivedEmailID = email ?? ""   // received email
                      
                        
                    }else {
                        print("error: \(String(describing: error?.localizedDescription))");
                    }
                }
            }else {
                print("error: \(String(describing: error?.localizedDescription))");
            }
        }        
    }
        
    func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
        return TWTRTwitter.sharedInstance().application(app, open: url, options: options)
    }

@IBAction func tapTwitter_btn(_ sender: Any) {

TWTRTwitter.sharedInstance().logIn { (session, error) in

if (session != nil) {

self.firstName = session?.userName ?? ""

self.lastName = session?.userName ?? ""

let client = TWTRAPIClient.withCurrentUser()

client.requestEmail { email, error in

if (email != nil) {

print("signed in as \(String(describing: session?.userName))");

let firstName = session?.userName ?? "" // received first name

let lastName = session?.userName ?? "" // received last name

let recivedEmailID = email ?? "" // received email

}else {

print("error: \(String(describing: error?.localizedDescription))");

}

}else {

print("error: \(String(describing: error?.localizedDescription))");

}

func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {

return TWTRTwitter.sharedInstance().application(app, open: url, options: options)

}

4: Now you have done all the required things for fetching the user credential in App

5: Now last important things that open the twitter developer site and select your app (where you have registered your iOS app)

1.1: Now you have to call back URL for App.

2.1: To get the call back URL

a: open info.plist file and copy URL schemes.

it look like this.

copy this ” twitterkit-js5zHyDKTz2RTthfgV5xl9icA”

Note: ” twitterkit- Your Consumer Key”

and Now open your twitter developer account & select your app.

3.1: edit the App account .

4.1: go to callback URLs section and paste it.

like that.

5.1:Now save this.

6: Now you are able to fetch the user data without any issue.

if you have any issue regarding twitter login than freely to ask , we will wait for your valuable feedback

kunal prasad 26 October 2021

. . .

11 comments

Priya gupta Jun 21, 2019 at 11:50 am

Great!!
Very Helpful

kunal prasad (Moderator) Jun 21, 2019 at 12:52 pm
Thanks

Reply

Tony Fotherby Jul 24, 2019 at 12:42 am

Thanks! The tip on the callback URLs was particularly helpful for me

kunal prasad (Moderator) Jul 24, 2019 at 9:35 am
Thanks

Reply

Sonu verma Oct 16, 2019 at 1:13 pm

i am not getting email id from this method
let client = TWTRAPIClient.withCurrentUser()
client.requestEmail { email, error in
if (email != nil) {
print(“signed in as \(String(describing: session?.userName))”);
let firstName = session?.userName ?? “” // received first name
let lastName = session?.userName ?? “” // received last name
let recivedEmailID = email ?? “” // received email

}else {
print(“error: \(String(describing: error?.localizedDescription))”);
}

kunal prasad (Moderator) Oct 16, 2019 at 2:21 pm
twitter account is created not only by email , it is created by phone number or other things so you will have make the check on this.

Reply
Nicholas Marriotti Nov 10, 2019 at 4:31 am
I’m stuck at “Redirecting back to application” after authorizing my app. My URL scheme and callback URL on the Twitter dashboard match. Any idea of what’s wrong or how to fix it?

Thanks
Nick

Reply
- kunal prasad (Moderator) Nov 11, 2019 at 4:50 pm
  Please check the function in Appdelegate.swift for handling the redirect URL.
  
  Reply
  - Tarang Gupta Jan 25, 2020 at 12:18 am
    Inside AppDelegate.swift, I have already written code like mentioned below:
    
    func application(_ application: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool {
    
    if TWTRTwitter.sharedInstance().application(application, open: url, options: options) {
    return true
    }
    return true
    }
    
    Still, I am not able to get redirected to my application. Any suggestion?
    
    Reply