Connecting a Native Swift iOS App to Data

Enterprise mobile apps most often need to integrate with broader platforms. This quickstart demonstrates how easy it is to integrate an iOS mobile app with the platform.

Enterprise mobile apps most often need to integrate with broader platforms. This quickstart demonstrates how easy it is to integrate an iOS mobile app with the platform.

Install Node.js and npm

If you haven’t installed node on your system, you’ll need to do this first. There are several methods for installing node. You can download node directly from the node.js web site, or use the Homebrew package manager to complete the installation for you.

After installing Node and npm, check that the software is installed before proceeding. An easy way to check that you’ll be able to use these tools is to check versions at the command line.

node --version npm -- version

Install forceios

The Salesforce SDK can automatically configure a new XCode project with development frameworks and correct settings. The SDK uses the Node npm command to create a new project. Npm is used to install the forceios package. Use the following command to install forceios on your development workstation globally:

sudo npm install forceios -g

Use Forceios to create your application

From the OSX command line.

forceios create

Respond to the various forceios commands to configure the XCode project correctly. Most of the responses to the project configuration will be obvious to iOS developers. The one that’s specific to the salesforce org is the “Connected App Callback URI”. This is a string you set within the Salesforce administration site when creating the Connected App this native iOS application will connect to.

The following is an example interactive session output from the foriceios configuration application.

Rob@robimac:~/Projects/blog/SalesForceSDKiOSExample$ forceios create Enter your application type (native, native_swift, react_native, hybrid_remote, or hybrid_local): native_swift Enter your application name: MTRolodex Enter the output directory for your app (defaults to the current directory): Enter the package name for your app (com.mycompany.my_app): com.mobiletoolworks.mtrolodex Enter your organization name (Acme, Inc.): Mobile Toolworks, LLC Enter your Connected App ID (defaults to the sample app's ID): Enter your Connected App Callback URI (defaults to the sample app's URI): sfdc://oauth-callback/salesforce Creating app in /Users/Rob/Projects/blog/SalesForceSDKiOSExample/MTRolodex Getting cocoapods dependencies Updating local specs repositories CocoaPods 1.0.0.beta.8 is available. To update use: `gem install cocoapods --pre` [!] This is a test version we'd love you to try. For more information see and the CHANGELOG for this version Analyzing dependencies Downloading dependencies Installing CocoaLumberjack (2.2.0) Installing SQLCipher (3.3.1) Installing SalesforceNetwork (4.1.1) Installing SalesforceRestAPI (4.1.1) Installing SalesforceSDKCore (4.1.1) Installing SmartStore (4.1.1) Installing SmartSync (4.1.1) Generating Pods project Integrating client project [!] Please close any current Xcode sessions and use `MTRolodex.xcworkspace` for this project from now on. Sending stats Sending stats Pod installation complete! There are 5 dependencies from the Podfile and 7 total pods installed. Successfully created native_swift app 'MTRolodex'.

After launching the XCode workspace — in this example “MTRolodex.workspace”, open the AppDelegate.swift file, and update the RemoteAccessConsumerKey and OAuthRedirectURI to match the values in your connected app.

import Foundation import UIKit import SalesforceSDKCore let RemoteAccessConsumerKey = "3MVG98SW_UPr.GCjfe8JFg6qFEHxBqp3EzFBBoCZsnc2zuq5rgVVPJUbBh3T6zLyp1k13Tj_csFpIobDVSQDf"; let OAuthRedirectURI = "sfdc://oauth-callback/salesforce"; class AppDelegate : UIResponder, UIApplicationDelegate . .

These values identify the iOS native application and enable users to use the native app to access Salesforce resources.

The default boilerplate app generated by forceios lists the users of the Salesforce org. Let’s make a slight change to instead list the Accounts store in the org. To do this, change the loadView() method within the RootViewController.swift class file as follows:

override func loadView() { super.loadView() self.title = "Mobile SDK Sample App" let soql = "SELECT Id, Name, BillingCity FROM Account" let request = SFRestAPI.sharedInstance().requestForQuery(soql); SFRestAPI.sharedInstance().send(request, delegate: self); }

Build and run

Now build and run the application. After the app launches, the first thing you should see is a Salesforce login form via OAuth.

As part of the login process, you probably will receive a 2-factor login verification as you would using Salesforce in the web browser. Complete the 2-factor login as usual.

Finally, the Salesforce OAuth process will ask the user to permit the custom application to access Salesforce objects and functions on behalf of the user. These permissions are configured when creating the Connected App in the Salesforce Admin console.

Now that all that is done, the magic should happen! Our native Swift iOS app will send a SOQL query to the Salesforce back-end, and retrieve the account list, displaying it in a table view.

If your account list displays, then congratulations! You’ve managed to create a native application that accesses Salesforce data.

Download the source code for the iOS app built for this article from my GitHub repository.

Author: Rob Kerr

Consultant and expert in software development for the iOS and Android platforms. Microsoft MVP Alumnus.

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