To begin, let’s introduce some key concepts:

Bundle Identifier

This is a unique identifier assigned to your app, typically in reverse domain name notation (e.g., com.yourcompany.yourapp). It ensures that no two apps share the same identifier.

Team ID

An Apple Developer Team ID is a unique 10-character alphanumeric identifier assigned by Apple to your development team.

App ID

This identifier comprises a Team ID (assigned by Apple to your development team) and a Bundle Identifier search string. It associates your app with specific services and capabilities, such as push notifications or iCloud or more importantly for us the associated domains.

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1. Xcode setup

We need to configure a few settings in Xcode: Xcode Configuration
1

Open your project in Xcode

  • Navigate to your flutter project directory in Finder then to your ios directory
  • Open Runner.xcworkspace
2

Go to Signing & Capabilities

Go to the Signing & Capabilities tab
3

Select your Apple ID account

Under Team, select your Apple ID account
If you haven’t added your Apple ID yet, click “Add Account…”, log in, and select it
Choose an account that is part of the Apple Developer Program
4

Set Bundle Identifier

Set a unique Bundle Identifier for your app
  • For example: com.yourname.myapp
    This needs to be globally unique across all apps in the App Store
5

Enable automatic signing

Check Automatically manage signing so Xcode takes care of configuring everything for you

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2. Register your device

Xcode needs to register your iPhone as a development device:
1

Connect your iPhone

Connect your iPhone to your Mac via a USB cable
2

Trust the computer

If it is the first time you connect, you may need to tap “Trust this computer” on your iPhone and enter your passcode
3

Select run target

In the top bar, select your connected iPhone from the device list as the run target
4

Register device

If this is your first time using the device for development, Xcode will register it automatically
Sometimes you need to replug your device for the registration to complete