iOS feature flags installation

dependencies: [
  .package(url: "https://github.com/PostHog/posthog-ios.git", from: "3.0.0")
]

pod "PostHog", "~> 3.0"

import Foundation
import PostHog
import UIKit

class AppDelegate: NSObject, UIApplicationDelegate {
    func application(_: UIApplication, didFinishLaunchingWithOptions _: [UIApplication.LaunchOptionsKey: Any]? = nil) -> Bool {
        let POSTHOG_API_KEY = "<ph_project_token>"
        let POSTHOG_HOST = "https://us.i.posthog.com"

        let config = PostHogConfig(apiKey: POSTHOG_API_KEY, host: POSTHOG_HOST)
        PostHogSDK.shared.setup(config)

        return true
    }
}

PostHogSDK.shared.capture("button_clicked", properties: ["button_name": "signup"])

let isMyFlagEnabled = PostHogSDK.shared.isFeatureEnabled("flag-key")
if isMyFlagEnabled {
    // Do something differently for this user
    // Optional: fetch the payload
    let matchedFlagPayload = PostHogSDK.shared.getFeatureFlagPayload("flag-key")
}

let enabledVariant = PostHogSDK.shared.getFeatureFlag("flag-key")
if enabledVariant == "variant-key" { // replace 'variant-key' with the key of your variant
    // Do something differently for this user
    // Optional: fetch the payload
    let matchedFlagPayload = PostHogSDK.shared.getFeatureFlagPayload("flag-key")
}