I have a UIKit project, and I added a SwiftUI page into the project. And I pushed the SwiftUI page with the following code.
@IBAction func push(_ sender: Any) {
let viewController = UIHostingController(rootView: OrangeConfigListView().environmentObject(Store()))
navigationController?.pushViewController(viewController, animated: true)
}
And here's the models.
struct 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.
struct 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 ?
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