import Flurry_iOS_SDK

...

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    // Override point for customization after application launch.
    Flurry.startSession("API_KEY_PLACEHOLDER", with: FlurrySessionBuilder
            .init()
            .withCrashReporting(true)
            .withLogLevel(FlurryLogLevelAll))
    // Your code...
    return true;
}