CODEWITHSUNDEEP
swiftswift2
Arti
Arti

Reputation: 7772

Where to store extensions in a Swift project

For example, I want to use this extension:

import Foundation

extension String {
    func exec (str: String) -> Array<String> {
       ....
    }
}

Where should I save it? Should I create a new file extensions.swift?

Upvotes: 6

Views: 2954

Answers (3)

katleta3000
katleta3000

Reputation: 2494

The old-way on objective-c was to name like:

UIView+FrameUtils.h

NSMutableArray+Sort.h

UIColor+HEX.h

NSDictionary+Nil.h

So it's clear what is extended (categorized in objective-c) and what new functional implemented. So you may use this style in Swift too

Upvotes: 1

Moriya
Moriya

Reputation: 7906

I'd recommend keeping a group in the project and then creating Files called [Class]Extension. If you store all extension in the same file as mentioned in the other answers you might end up having a lot of issues finding the extension you are looking for and you end up with a file full of different responsibilities. In a small project that might not matter but its better to force good organisation early in a project because you never know which project might grow.

Upvotes: 2

Scriptable
Scriptable

Reputation: 19758

For global extensions such as the one above I think it would be best to put it in an extensions.swift file. If your extending one of your own classes I find it best to keep it in the same file as the original class so that other developers know about it.

If you have multiple extensions for a particular global class such as String, you could group them into a StringExtensions.swift file.

Upvotes: 11

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