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iOS Build a Weather App with Swift Managing Complexity Callback Methods With Closures

Challenge closure stuck, what is wrong here?? What i missed, when declaring closure?

Is there a problem here? Or what is wrong with my code? thanks for help

Callbacks.swift
import Foundation

// Add your code below

typealias BlogPostCompletion = (data: NSData!, response: NSURLResponse!, error: NSError!) -> Void

func fetchTreehouseBlogPosts(completion: BlogPostCompletion) {

}

2 Answers

Harish Yerra
Harish Yerra
10,031 Points

The typealias should be like this: typealias BlogPostCompletion = ((NSData!, NSURLResponse!, NSError!) -> Void) You were just missing the parenthesis at the beginning and one at the end. I hope that helps.

Aby Abraham
PLUS
Aby Abraham
Courses Plus Student 12,531 Points

Missing paranthesis

typealias BlogPostCompletion = ((NSData!, NSURLResponse!, NSError!) -> Void)

func fetchTreehouseBlogPosts (completion: BlogPostCompletion) {

}