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iOS Swift Closures Closures in iOS Writing Methods With Closures

Posted by Alec Coyle-Nicolas
Alec Coyle-Nicolas
2,346 Points

How is a parameter and a return type without a body of code considered a closure?

For example, in the getRecentBlogPosts method, we add a completion parameter of type (NSURLResponse! -> Void), but how exactly is this considered a closure? I thought they needed a body of code afterwards.

1 Answer

Rashii Henry
Rashii Henry
16,433 Points
Rashii Henry
Rashii Henry
16,433 Points

I know this concept can be a bit confusing but once you notice that when you write a function. after you declare the return there are a set of brackets that follow the return.

Thoses brackets are the block of code that qualifies a function as a closure. Whether it's empty or not its syntax is read by the compiler as a block of code, function, or closure. Use those terms pretty loosely. Hopes this helps bro!