A Swift micro-framework to easily deal with weak references to self inside closures
WeakableSelf
Context
Closures are one of Swift must-have features, and Swift developers are aware of how tricky they can be when they capture the reference of an external object, especially when this object is self.
To deal with this issue, developers are required to write additional code, using constructs such as [weak self] and guard, and the result looks like the following:
service.call(completion: { [weak self] result in
guard let self = self else { return }
// use weak non-optional `self` to handle `result`
})
Purpose of WeakableSelf
The purpose of this micro-framework is to provide the developer with a helper function weakify that will allow him to declaratively indicate that he wishes to use a weak non-optional reference to self in closure, and not worry about how this reference is provided.
Usage
Using this weakify function, the code above will be transformed into the much more concise:
import WeakableSelf
service.call(completion: weakify { strongSelf, result in
// use weak non-optional `strongSelf` to handle `result`
})
weakify works with closures that take up to 7 arguments.
Installation
Requirements
- Swift 4.2+
- Xcode 10+
CocoaPods
Add the following to your Podfile:
pod "WeakableSelf"
Carthage
Add the following to your Cartfile:
github "vincent-pradeilles/weakable-self"