Arguments forwarding to resolver's initCompleted about swinject

[yoichitgy]

You can do that if I caught your question correctly.

Here is the document:
https://github.com/Swinject/Swinject/blob/master/Documentation/DIContainer.md#registration-with-arguments-to-di-container

[nayzak]

In documentation nothing mentioned about parameters and initCompleted callback. In my case I have a view model, that depends on some parameters and services. So I registering it like this:

container.register(MenuPageModeller.self) {  r, menuId in 
  MenuPageModel(menuId: menuId, apiService: r.resolve(ApiService.self)!) 
}

And I have a view controller, that have public property viewModel: MenuPageModeller. I'd like to inject this property automatically. Instead of doing this:

let viewModel = container.resolve(MenuPageModeller.self, argument: 123)
let page = MenuPage()
page.viewModel = viewModel

I'd like to do this:

let page = container.resolve(MenuPage.self, argument: 123)

Is that possible? Or I'm trying to do something weird? I'm new to DI :)

[yoichitgy]

You can do that something like this without using initCompleted if your types do not have circular dependencies.

container.register(MenuPageModeller.self) {  r, menuId in MenuPageModel(menuId: menuId) }

container.register(MenuPage.self) { r, menuId in
         let page = MenuPage()
         page.viewModel = r.resolve(MenuPageModeller.self, argument: menuId)
         return page
     }

then

let page = container.resolve(MenuPage.self, argument: 123)

(initCompleted doesn't support taking arguments.)

[nayzak]

Thanks! I have already tried this example before asking my question, but compiler didn't understand this code:

container.register(MenuPage.self) { r, menuId in
         let page = MenuPage()
         page.viewModel = r.resolve(MenuPageModeller.self, argument: menuId)
         return page
     }

After your answer I tried it again and figured out, that we need to specify closure arguments types:

container.register(MenuPage.self) { (r: ResolverType, menuId: Int) in
      let page = MenuPage()
      page.viewModel = r.resolve(MenuPageModeller.self, argument: menuId)!
      return page
    }

And this works as expected.

Thank you again! 👍

[yoichitgy]

@nayzak that's good to hear you got the solution❗️I forgot mentioning the explicit type specification in case the Swift compiler cannot infer the types.