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

Marcos Reboucas
Marcos Reboucas
12,890 Points
Posted by Marcos Reboucas
Marcos Reboucas
12,890 Points

Closure Syntax doesn't work

I've tried some options to write the closure but can't figure out what's wrong. My code:

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

func fetchTreehouseBlogPosts(completion:BlogPostCompletion) { }

Anyone can help? Thank you

1 Answer

Richard Lu
Richard Lu
20,185 Points
Richard Lu
Richard Lu
20,185 Points

Hey Marcos,

I notice that your typealias definition is incorrect. It should look like this without the parameter names:

typealias BlogPostCompletion = ((NSData!, NSURLResponse!, NSError!) -> Void)  //The outer parenthesis are only required for the challenge.

Hopefully this helps.