The Cello SDK for iOS enables you to add a referral program into your iOS app. With a plug-n-play mobile component, your users can easily share their invite link with their friends and network using mobile sharing options convenient for them, receive rewards and get paid out.

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Installation

A basic installation takes around 15 minutes but will take a little longer if you want to customize the way the Cello Referral Component is launched. Compatibility Cello for iOS is compatible with iOS 15 and up.

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SDK size

The size of Cello for iOS varies depending on your app’s configuration. For most installations, it’s around 3 MB in size.

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Setup

Install Cello to see and give your users the option to spread the word from your iOS app. The Cello for iOS library supports iOS 15+ and requires Xcode 14 to build.

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Install Cello

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Option 1: CocoaPods

Using the latest version of Cocoapods, add CelloSDK to your Podfile and run pod install 
target :YourTargetName do
  pod 'CelloSDK'
end

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Option 2: Swift Package Manager

Add https://github.com/getcello/cello-ios-sp as a Swift Package Repository in Xcode and follow the instructions to add CelloSDK as a Swift Package. iOS Swift Package Manager configuration for Cello SDK installation

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Option 3: Install Cello manually

  1. Download Cello for iOS and extract the zip. (👉 Cello iOS zip download)
  2. Drag CelloSDK.xcframework into your project. Make sure Copy items if needed is selected and click Finish.
  3. In the target settings for your app, set the CelloSDK.xcframework to Embed & Sign in the Frameworks, Libraries, and Embedded Content section of the General tab.

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Choose an Environment

In your Cello SDK setup, you have the flexibility to select the environment in which your application will run. This feature is especially useful for different stages of development, such as testing in a development or staging environment before going live in production. The available environments are: Available environments:
  • prod (Production)
  • sandbox (Sandbox)
Default environment: prod

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Configuration Steps

  • Open your iOS project in Xcode.
  • Navigate to the Info.plist file.
  • Add a new key-value pair: 
    <key>CELLO_ENV</key>
<string>prod</string>
  • To switch to sandbox, change the string value to sandbox.
  • Save your changes. The next build will use the selected environment.
Using this setup, the Cello SDK on iOS can adapt to the chosen environment, allowing a smoother and more controlled development and testing process.

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Initialize Cello

You’ll need your product ID and a user-specific token (similar to the web-based Referral component flow): 
import CelloSDK

Cello.initialize(for: "YOUR_PRODUCT_ID", with: token) { result in
   switch result {
   case .success(let configuration):
      print("Initialization successful with config:", configuration)
   case .failure(let error):
      print("Initialization failed with error:", error)
   }
}

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Customize the Cello Referral Component

The Cello SDK allows for various levels of customization to better fit into your app’s design and flow. One of the main components you might want to customize is the Referral component

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Choose your launcher

  • Default launcher: Use Cello.showFab() to present a pre-styled Floating Action Button (FAB). 
    import CelloSDK
Cello.showFab()
  • Custom launcher: Use any UI element (button, menu item, gesture) and call Cello.openWidget() when you want to open it. 
    import CelloSDK

class YourViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        let myButton = UIButton(type: .system)
        myButton.setTitle("Open Referral", for: .normal)
        myButton.addTarget(self, action: #selector(didTapMyButton), for: .touchUpInside)
        // Add 'myButton' to your view
    }

    @objc func didTapMyButton() {
        Cello.openWidget()
    }
}

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Advanced: Custom Callbacks

For even more control, you can implement your own delegate conforming to the CelloDelegate protocol. This allows you to get callbacks for significant events in the Referral component. 
class YourViewController: UIViewController, CelloDelegate {
    func celloWidgetDidOpen() {
        print("Cello widget opened")
    }
    func celloWidgetDidClose() {
        print("Cello widget closed")
    }
    override func viewDidLoad() {
        super.viewDidLoad()
        Cello.delegate = self
    }
}

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iOS API

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Cello.initialize()

Initializes the Cello referral component.
NameTypeDescriptionRequired
productIdstringIdentifier of the product your users will refer. Found in your Cello Portal.Yes
tokenstringAccess token generated for the given user.Yes
completioncallbackReceives success or failure with configuration or error.
import CelloSDK
Cello.initialize(for: "dev.cello.so", with: token) { result in
   switch result {
   case .success(let configuration):
       print("Initialization successful with config:", configuration)
   case .failure(let error):
       print("Initialization failed with error:", error)
   }
}

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Cello.showFab()

Shows the Floating action button or bookmark that launches the Referral Component 
import CelloSDK
Cello.showFab()

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Cello.hideFab()

Hides the Floating action button or bookmark that launches the Referral Component 
import CelloSDK
Cello.hideFab()

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Cello.openWidget()

Opens the referral component. 
import CelloSDK
Cello.openWidget()

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Cello.hideWidget()

Hides the referral component. 
import CelloSDK
Cello.hideWidget()

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Cello.getActiveUcc()

A method to get an active ucc and invite link for the currently logged in user. 
import CelloSDK
let result = Cello.getActiveUcc()

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Cello.changeLanguage()

A method to change the language of the Referral component at runtime without re-initialising it. 
import CelloSDK
Cello.changeLanguage(to: .de)

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Cello.shutdown()

Shuts down connection to Cello and unmounts the component 
import CelloSDK
Cello.shutdown()