A Rails-like environment helper for iOS apps, from https://masilotti.com/rails-like-endpoint-switcher-for-ios-apps/

Endpoint.swift

import Foundation

enum Environment: String {
    case development, staging, production
}

extension Environment {
    static var current: Environment {
        if isAppStore {
            return .production
        } else if isTestFlight {
            return .staging
        }
        return .development
    }

    static var isTestFlight: Bool {
        if isSimulator {
            return false
        } else {
            if isAppStoreReceiptSandbox, !hasEmbeddedMobileProvision {
                return true
            } else {
                return false
            }
        }
    }

    static var isAppStore: Bool {
        if isSimulator {
            return false
        } else {
            if isAppStoreReceiptSandbox || hasEmbeddedMobileProvision {
                return false
            } else {
                return true
            }
        }
    }
    
    var isDevelopment: Bool { self == .development }
    var isStaging: Bool { self == .staging }
    var isProduction: Bool { self == .production }

    private static var hasEmbeddedMobileProvision: Bool {
        guard Bundle.main.path(forResource: "embedded", ofType: "mobileprovision") == nil else {
            return true
        }
        return false
    }

    private static var isAppStoreReceiptSandbox: Bool {
        if isSimulator {
            return false
        } else {
            guard let url = Bundle.main.appStoreReceiptURL else {
                return false
            }
            guard url.lastPathComponent == "sandboxReceipt" else {
                return false
            }
            return true
        }
    }

    private static var isSimulator: Bool {
        #if targetEnvironment(simulator)
        return true
        #else
        return false
        #endif
    }
}

I cobbled this together from multiple sources to easily determine the "environment" of an iOS app based on where it was installed from. I use it change the root endpoint of Turbo Native apps in one line.

When I build to the simulator from Xcode I hit my local server. And folks who download from the App Store hit the production endpoint.

enum Endpoint {
    static var root: URL {
        switch Environment.current {
        case .development:
            return URL(string: "http://localhost:3000")!
        case .staging:
            return URL(string: "https://dev.masilotti.com")!
        case .production:
            return URL(string: "https://masilotti.com")!
        }
    }
}

let rootURL = Endpoint.root

I wrote more about this on my blog: https://masilotti.com/rails-like-endpoint-switcher-for-ios-apps/