Environment object become nil

Question

Created Jul ’20

Replies 1

Boosts 0

Views 1.2k

Participants 2

I have a UIKit project, and I added a SwiftUI page into the project. And I pushed the SwiftUI page with the following code.

Code Block swift   @IBAction func push(_ sender: Any) {
    	let viewController = UIHostingController(rootView: OrangeConfigListView().environmentObject(Store()))
    	navigationController?.pushViewController(viewController, animated: true)
  }

And here's the models.

Code Block swiftstruct Group: Codable, Identifiable {
		var id:Int {
				name.hash
		}
		var name: String
		var configs: [Config]
}
struct Config: Codable, Identifiable {
		var key: String
		var value: String
		var id: Int {
				key.hash
		}
		var mocked = false
		var mockedValue: String?
		
		enum CodingKeys: String, CodingKey {
				case key
				case value
		}
}
final class Store: ObservableObject {
		@Published var groups: [Group]
		
		init() {
				/* load groups */
		}
		
		func mock(group: Group, config: Config, mockedValue: String) {
				let groupIndex = groups.firstIndex(matching: group)
				let configIndex = group.configs.firstIndex(matching: config)
				groups[groupIndex].configs[configIndex].mocked = true
				groups[groupIndex].configs[configIndex].mockedValue = mockedValue
		}
		
		func unmock(group: Group, config: Config) {
				let groupIndex = groups.firstIndex(matching: group)
				let configIndex = group.configs.firstIndex(matching: config)
				groups[groupIndex].configs[configIndex].mocked = false
				groups[groupIndex].configs[configIndex].mockedValue = nil
		}
}

And here's the view code.

Code Block swiftstruct OrangeConfigCell: View {
  @State var text: String
  var config: OrangeConfig
  var mockAction: (String) -> Void
  var body: some View {
    VStack {
      HStack {
        Text(config.key)
          .font(.subheadline)
        Spacer()
        Button(config.mocked ? "Unmock" : "Mock") {
          self.mockAction(text)
        }
        .foregroundColor(.blue)
      }
      TextView(text: $text, borderColor: config.mocked ? colorLiteral(red: 0.4745098054, green: 0.8392156959, blue: 0.9764705896, alpha: 1) : colorLiteral(red: 0.501960814, green: 0.501960814, blue: 0.501960814, alpha: 1))
        .frame(height: 200)
    }
    .buttonStyle(PlainButtonStyle())
  }
}
But when I triggered 'mockAction', I something wired just happened, the 'store' become nil!
How would this happen ?

Boost

Answer 1

Pavanm35 OP

Oct ’21

I have similar issue but what i did is injected environmentObject from nested subview

0