Swift Struct Memory Leak

Question

We\'re trying to use Swift structs where we can. We are also using RxSwift which has methods which take closures. When we have a struct that creates a closure that refers to

Answer 1

You can solve the problem by creating a weak reference to the object which is captured by the closure.

Here is your example without memory leak:

import Foundation
import RxSwift

struct WithoutLeak {

    var someState: String = "initial value"
    var someVariable: Variable = Variable("some stuff")

    let bag = DisposeBag()

    mutating func someFoo() {

        weak let weakSomeState = someState // <-- create a weak reference outside the closure

        someVariable.subscribeNext { person in

            weakSomeState = "something" // <-- use it in the closure
        }
        .addDisposableTo(bag)
    }
}