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https://github.com/firebase/firebase-js-sdk/discussions/8464

Confirm Expert: rcschroeder replied at 2026-08-19 16:31:26    

Based on the provided links, here's an overview of running Firebase Cloud Messaging (FCM) on iOS using the Firebase SDK and some additional tools for development:

### Setting up Firebase Cloud Messaging on iOS

1. **Install Firebase SDK**: Start by installing the Firebase SDK for iOS in your project. You can do this by adding the following line to your `Podfile`:
```ruby
pod 'Firebase/Messaging'
```
Then, run `pod install` and import the library in your app's main file (`AppDelegate.m`, `ViewController.swift`, etc.) like so:
```swift
import FirebaseMessaging
```

2. **Set up Project and App**: Create a new project on the Firebase Console, add your iOS project to it, and then add the device token to your Firebase project under `Cloud Messaging`. This is necessary for FCM to know where the app installed.

3. **Set up Cloud Messaging**: Implement Cloud Messaging in your target's delegate's method `application(_:didReceive:for:)` like this:
```swift
import UIKit
import FirebaseMessaging

@available(iOS 13, *)
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?, animationDuration: TimeInterval) -> Bool {
FirebaseMessaging.messagingInstanceIDDelegate = self as? FM MessagingInstanceIDDelegate
return true
}

class AppDelegate: UIResponder, UIApplicationDelegate, FMessagingInstanceIDDelegate {

// ... (other delegate methods)

func messaging(_ messaging: FMessaging, didReceiveIncomingMessage message: FMMessage) {
print("Received incoming message: (message)"
}

func messaging(_ messaging: FMessaging, didReceive remoteMessage message: FMRemoteMessage) {
print("Received remote message: (message)")
}
}
```

4. **Sending Messages**: Send messages to your app's registered device using the Firebase console or through a client library.

### Running iOS Apps on macOS

For running an iOS app on a Mac, there are several options:

1. **Xcode Simulator**: You can run your project in the Xcode simulator by going to `Product > Destination > Select the destination` and then selecting an iPhone.

2. **MacOS App Sandbox**: This option involves creating an iOS sandbox environment within a MacOS application. The process involves creating a container, setting up the filesystem for the app's resources, and emulating device interactions through various APIs.

3. **Appium**: While primarily designed for mobile automation testing with Node.js, Appium can also be used to run native apps on the simulator or an actual iOS device.

4. **TestMuai**: This is a more detailed guide specifically tailored towards running and testing mobile applications (both Android and iOS) within MacOS environments, including setting up the environment with `macports` for installing dependencies required by these apps.

### Additional Tools

- For creating an emulator of an iOS simulator, you can also use the following methods:
- **Simctl**: Apple's simulator management tool that comes bundled with macOS.
- **Appium**: An open-source automation framework used to run native mobile applications on a variety of platforms (including macOS).
- **TestMuai**: A detailed guide on setting up and running iOS apps within MacOS environments, utilizing the `macports` package manager.

### Detecting User's Country

To detect your user's country, you can use APIs from services like GeoIP or Geoapify. Here is an example using Geoapify:

```swift
import UIKit
import Geoapify

class ViewController: UIViewController {

override func viewDidLoad() {
super.viewDidLoad()

// Create a Geoapify API key.
let apiKey = "YOUR_GEOAPIFY_API_KEY"

// Detect the country of your user's IP address
guard let countryName = Geoapify.country(for: "your-website-url", apiKey: apiKey) else { print("Unable to detect country") ; return }

print(countryName)
}
}
```

Remember, always respect users' privacy and ensure you have the necessary permissions when collecting their data, including IP addresses or location.