当我转到另一个视图时，为什么不调用deinit？

Question

I have a object for my viewcontroller in a navigationcontroller that don't get deinitialized when i go back and i wonder why.

This is the class

class MyLeague {
    var league : League?
    var fixtures : [Fixture] = []
    var teams : [Team] = []
    var standings : [Standing] = []

    init() {
        print("Creating")
    }
    deinit {
        print("Deallocating")
    }
}

Here is how i create it in the viewcontroller

let selectedLeague = MyLeague()

And this way i set the property

    APIManager.shared.request(url: url, onSuccess: { [weak self] (data) in
        do {
            let fixtureData = try JSONDecoder().decode(FixturesResponse.self, from: data)
            self?.selectedLeague.fixtures = fixtureData.api.fixtures
            self?.competitionTableView.reloadData()
        } catch {
            print(error)
        }
    }) { (error) in
        print(error)
    }

Answer 1

Try using Instruments to find any retain cycles in your code.

You can access it from Product -> Profile Then select the Allocations tool and use it to track which object is calling your class at that frame of time when you navigate. Hope this helped.