GoogleSignIn-Swift
Minimalistic Google Sign In oAuth 2.0 client written in Swift
Install
GoogleSignIn-Swift is compatible with Swift Package Manager. You can add it as a dependency to your Xcode project by following official documentation.
Use
-
You will need to configure Google oAuth 2.0 client
- Go to Google API Console
- Create new project or choose existing one
- On "Credentials" page, choose "Create credentials ➔ oAuth Client ID"
- Choose "Other" as a Application Type
-
In your project create
GoogleSignIn.Controller
instanceimport GoogleSignIn let controller = GoogleSignIn.Controller( config: GoogleSignIn.Config( clientId: "CLIENT_ID", clientSecret: "CLIENT_SECRET", redirectUri: "REDIRECT_URI" ), session: URLSession.shared )
You can obtain
CLIENT_ID
andCLIENT_SECRET
from Google API Console.REDIRECT_URI
is yourCLIENT_ID
with reverse domain notation and://
suffix. For example:- client id:
1234-abcd.apps.googleusercontent.com
- reversed client id:
com.googleusercontent.apps.1234-abcd
- redirect uri:
com.googleusercontent.apps.1234-abcd://
- client id:
-
Implement presenting sign in page to the user, by opening
signInPageURL
provided by the controller.It can vary depending on the type of the app you are working on. The simpliest way to do it in iOS app is by using
UIApplication.open(_ url:)
:UIApplication.shared.open(controller.signInPageURL)
-
Configure your application, so it can handle redirect after sign in.
For iOS app, you can do it by adding or modifying
CFBundleURLTypes
inInfo.plist
:<key>CFBundleURLTypes</key> <array> <dict> <key>CFBundleTypeRole</key> <string>Editor</string> <key>CFBundleURLName</key> <string></string> <key>CFBundleURLSchemes</key> <array> <string>REDIRECT_URI_SCHEME</string> </array> </dict> </array>
Replace
REDIRECT_URI_SCHEME
with yourCLIENT_ID
using reverse domain notation. For example:com.googleusercontent.apps.1234-abcd
. -
Handle redirection after user signs in to obtain oAuth tokens (access, ID and refresh) by calling
getTokenResponse
function onGoogleSignIn.Controller
.For iOS app, you can do it by implementing this function in your
UIApplicationDelegate
:func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool { controller.getTokenResponse(using: url) { result in if case let .success(response) = result { print("ACCESS TOKEN: \(response.accessToken)") } } return true }
If you are using
UIWindowSceneDelegate
in your app, implement this function instead:func scene(_ scene: UIScene, openURLContexts contexts: Set<UIOpenURLContext>) { guard let redirectUrl = contexts.first?.url else { return } controller.getTokenResponse(using: redirectUrl) { result in if case let .success(response) = result { print("ACCESS TOKEN: \(response.accessToken)") } } }
-
Do whatever you want with obtained access token.
License
Copyright © 2019 Dariusz Rybicki Darrarski
License: GNU GPLv3