EntityIterator: Wrapper around SwiftUI's ForEach to iterate through Core Data entities according to a predicate and sort descriptors you can change at runtime

EntityIterator.swift

//adapted via: https://www.hackingwithswift.com/books/ios-swiftui/dynamically-filtering-fetchrequest-with-swiftui

import SwiftUI
import CoreData

struct EntityIterator<Entity: NSManagedObject, Content: View>: View {
    
    var fetchRequest: FetchRequest<Entity>
    var results: FetchedResults<Entity> { fetchRequest.wrappedValue }

    let content: (Entity) -> Content

    var body: some View {
        ForEach(fetchRequest.wrappedValue, id: \.self) { result in
            self.content(result)
        }
    }

    init(predicate: NSPredicate, sortDescriptors: [NSSortDescriptor],  @ViewBuilder content: @escaping (Entity) -> Content) {
        fetchRequest = FetchRequest<Entity>(entity: Entity.entity(), sortDescriptors: sortDescriptors, predicate: predicate)
        
        self.content = content
    }
}

Example usage:

struct AView: View {
    @State var predicate = …
    @State var sortDescriptors = […]

    var body: some View {

        List {
            EntityIterator(predicate: predicate, sortDescriptors: sortDescriptors) { (entity: EntityType) in
                Text(entity.name)
            }
        }

    }
}