Braintree iOS Drop-In SDK

Welcome to Braintree's Drop-In SDK for iOS!

The Braintree iOS Drop-In SDK requires Xcode 11+. It permits a Deployment Target of iOS 9.0 or higher.

What's new

• All new UI and integration for Drop-In
• Fetch a customer's payment method without showing UI
• UI elements, art, helpers and localization are now accessible
• Added Apple Pay and UnionPay support to Drop-In
• Customizable appearance
• And more...

Please create an issue with any comments or concerns.

Getting Started

We recommend using either CocoaPods or Carthage to integrate the Braintree SDK with your project.

CocoaPods

Add to your Podfile:

pod 'BraintreeDropIn'

Then run pod install.

Customize your integration by specifying additional components. For example, to add Apple Pay support:

pod 'BraintreeDropIn'
pod 'Braintree/Apple-Pay'

See our Podspec for more information.

Carthage

Add github "braintree/braintree-ios-drop-in" to your Cartfile, and add the frameworks to your project.

You will need the following frameworks at a minimum:

BraintreeDropIn.framework
BraintreeUIKit.framework
BraintreeCard.framework
BraintreeCore.framework
BraintreePaymentFlow.framework
BraintreePayPal.framework
PayPalDataCollector.framework
PayPalOneTouch.framework
PayPalUtils.framework

For Apple Pay, you must add the following framework in addition to PassKit:

BraintreeApplePay.framework

For 3DS 2.0, you must add the following framework:

CardinalMobile.framework

Documentation

Import BraintreeDropIn and Braintree

Add the import statements to any class where you are using Braintree.

import BraintreeDropIn
import Braintree

Show Drop-In

Present BTDropInController to collect the customer's payment information and receive the nonce to send to your server. Saved payment methods will appear if you specified a customer_id when creating your client token.

func showDropIn(clientTokenOrTokenizationKey: String) {
    let request =  BTDropInRequest()
    let dropIn = BTDropInController(authorization: clientTokenOrTokenizationKey, request: request)
    { (controller, result, error) in
        if (error != nil) {
            print("ERROR")
        } else if (result?.isCancelled == true) {
            print("CANCELLED")
        } else if let result = result {
            // Use the BTDropInResult properties to update your UI
            let selectedPaymentOptionType = result.paymentOptionType
            let selectedPaymentMethod = result.paymentMethod
            let selectedPaymentMethodIcon = result.paymentIcon
            let selectedPaymentMethodDescription = result.paymentDescription
        }
        controller.dismiss(animated: true, completion: nil)
    }
    self.present(dropIn!, animated: true, completion: nil)
}

Apple Pay + Drop-In

Make sure the following is included in your Podfile:

pod 'Braintree/Apple-Pay'

Apple Pay is enabled by default in Drop-In. Unless you opt out, by setting showApplePayPaymentOption = false, Drop-In will show Apple Pay as a payment option as long as it is enabled in the control panel. Below is an example of hiding the Apple Pay button if the device can't make Apple Pay payments using certain card networks:

let request =  BTDropInRequest()
let canMakePayments = PKPaymentAuthorizationViewController.canMakePayments() && PKPaymentAuthorizationViewController.canMakePayments(usingNetworks: [.amex, .visa, .masterCard])
request.applePayDisabled = !canMakePayments

Important If your customer selected Apple Pay as their preferred payment method then result.paymentOptionType == .ApplePay and the result.paymentMethod will be nil. Selecting Apple Pay does not display the Apple Pay sheet or create a nonce - you will still need to do that at the appropriate time in your app. Use BTApplePayClient to tokenize the customer's Apple Pay information - view our official docs for more information.

3D-Secure + Drop-In

The new Drop-In supports 3D-Secure verification. If you have enabled 3D-Secure in the control panel, enable it in the BTDropInRequest and set an amount. Then, create a BTThreeDSecureRequest object, setting as many fields on it as possible; the more fields that are set, the less likely it is that a user will be be presented with a challenge. Make sure to attach this object to the BTDropInRequest before use.

let request = BTDropInRequest()
request.threeDSecureVerification = true

let threeDSecureRequest = BTThreeDSecureRequest()
threeDSecureRequest.threeDSecureRequestDelegate = self

threeDSecureRequest.amount = 1.00
threeDSecureRequest.email = "[email protected]"
threeDSecureRequest.requested = .version2

let address = BTThreeDSecurePostalAddress()
address.givenName = "Jill"
address.surname = "Doe"
address.phoneNumber = "5551234567"
address.streetAddress = "555 Smith St"
address.extendedAddress = "#2"
address.locality = "Chicago"
address.region = "IL"
address.postalCode = "12345"
address.countryCodeAlpha2 = "US"
threeDSecureRequest.billingAddress = address

// Optional additional information.
// For best results, provide as many of these elements as possible.
let additionalInformation = BTThreeDSecureAdditionalInformation()
additionalInformation.shippingAddress = address
threeDSecureRequest.additionalInformation = additionalInformation

request.threeDSecureRequest = threeDSecureRequest

Managing payment methods

By default, if you initialize the Drop-in with a client token generated with a customer ID, Drop-in will add payment methods to that customer within the Braintree Vault. You can optionally allow the deletion of payment methods for that customer by enabling vaultManager.

let request =  BTDropInRequest()
request.vaultManager = true

Fetch last used payment method

If your user already has an existing payment method, you may not need to show the Drop-In payment picker. You can check if they have an existing payment method using BTDropInResult:fetchDropInResultForAuthorization. Note that the handler will only return a result when using a client token that was created with a customer_id. BTDropInResult makes it easy to get a description and icon of the payment method.

func fetchExistingPaymentMethod(clientToken: String) {
    BTDropInResult.fetch(forAuthorization: clientToken, handler: { (result, error) in
        if (error != nil) {
            print("ERROR")
        } else if let result = result {
            // Use the BTDropInResult properties to update your UI
            let selectedPaymentOptionType = result.paymentOptionType
            let selectedPaymentMethod = result.paymentMethod
            let selectedPaymentMethodIcon = result.paymentIcon
            let selectedPaymentMethodDescription = result.paymentDescription
        }
    })
}

Localization

Drop-In is currently localized for 23 languages.

Color Schemes

Drop-In is fully customizable, but we also provide Light, Dark and Dynamic color schemes. The dynamic color scheme will switch between light and dark based on whether the device is in light or dark mode. The Dynamic scheme is only available in iOS 13 or higher. Drop-In will use the Light color scheme by default.

// Set the theme before initializing Drop-In
BTUIKAppearance.sharedInstance().colorScheme = .dynamic

Customization

Use BTUIKAppearance to customize the appearance of Drop-In and other BraintreeUIKit classes.

// Example
BTUIKAppearance.sharedInstance().primaryTextColor = UIColor.green

BraintreeUIKit

BraintreeUIKit is our new framework that makes our UI classes public allowing you to create custom checkout experiences. This includes localization, vector art, form fields and other utils you might need when working with payments. BraintreeUIKit has no dependencies on other Braintree frameworks.

To get the standalone BraintreeUIKit framework, add the following to your Podfile:

pod 'BraintreeDropIn/UIKit'

// Example: Get a Visa card icon
let visaIcon = BTUIKPaymentOptionCardView()
visaIcon.paymentOptionType = BTUIKPaymentOptionType.visa

// Example: Create a generic form field and prepare it for autolayout
let favoriteColorFormField = BTUIKFormField()
favoriteColorFormField.translatesAutoresizingMaskIntoConstraints = false
favoriteColorFormField.textField.placeholder = "Favorite Color"
// ... add the form field to your view and use auto layout to position it

Take a look at BTCardFormViewController.m to see examples of using the form fields and their delegates.

URL Query Scheme Whitelist

If your app is compiled with iOS 9 SDK and integrates payment options with an app-switch workflow (Venmo, PayPal), you must add URL schemes to the whitelist in your application's plist.

If your app supports payments from PayPal:

• com.paypal.ppclient.touch.v1
• com.paypal.ppclient.touch.v2

If your app supports payments from Venmo:

• com.venmo.touch.v2

For example, if your app supports PayPal, you could add the following:

  <key>LSApplicationQueriesSchemes</key>
  <array>
    <string>com.paypal.ppclient.touch.v1</string>
    <string>com.paypal.ppclient.touch.v2</string>
  </array>

There is a new UIApplicationDelegate method that you may implement on iOS 9:

- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<NSString*, id> *)options

Implementing this method is optional. If you do not implement it, the deprecated equivalent will still be called; otherwise, it will not.

In either case, you still need to implement the deprecated equivalent in order to support iOS 8 or earlier:

- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation

More Information

Start with 'Hello, Client!' for instructions on basic setup and usage.

Next, read the full documentation for information about integration options, such as Drop-In UI, custom payment button, and credit card tokenization.

Demo

A demo app is included in project. To run it, run pod install and then open BraintreeDropIn.xcworkspace in Xcode.

Help

• Read the headers
• Read the docs
• Find a bug? Open an issue
• Want to contribute? Check out contributing guidelines and submit a pull request.

Feedback

The Braintree iOS Drop-In SDK is in active development, we welcome your feedback!

Here are a few ways to get in touch:

• GitHub Issues - For generally applicable issues and feedback
• Braintree Support / [email protected] - for personal support at any phase of integration

Releases

Subscribe to our Google Group to be notified when SDK releases go out.

License

The Braintree iOS Drop-In SDK is open source and available under the MIT license. See the LICENSE file for more info.