application(_:didFinishLaunchingWithOptions:)' nearly matches optional requirement

Question

After installing Xcode 8 beta 6, I\'m getting a warning saying:

Instance method \'application(_:didFinishLaunchingWithOptions:)\' nearly matches optional

Answer 1

the first parameter passed into the function no longer has an external name. This is really just a minor detail since you don’t call this method directly, and it’s a quick fix to make the compiler happy. You can either manually edit that first parameter name to _, or just let Xcode handle this for you.

func application(_ application: UIApplication,
didFinishLaunchingWithOptions launchOptions: [NSObject : AnyObject]?) -> Bool  

or the New Syntax

func application(_ application:UIApplication, 
didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool // or remove = nil and try

you can get the latest Documentation from apple and sample link in here