Calling Swift Closure Inside Closure

Question

I have the following code:

  twitterAPI?.verifyCredentialsWithUserSuccessBlock({ (userName, password) -> Void in


            twitterAPI?.getUserTimelin         


        

Answer 1

Swift 4

Here is the simple example. But better to make an implementation through monad.

...
guard let api = twitterAPI else { return }

api.verifyCredentialsWithUserSuccessBlock({ userName, password in
    api.getUserTimelineWithScreenName(
        userName, 
        count: 100, 
        successBlock: { value in
            // success
        }) { error in 
            print("get user error: \(error)") 
        }
}) { error in 
    print("verify error: \(error)") 
}