【SwiftUI 3.0】refreshable で Pull To Refresh を実装

struct ContentView: View {
    @State var articles: [String] = [
        "Article01",
        "Article02",
        "Article03",
        "Article04",
        "Article05",
    ]
    
    var body: some View {
        NavigationView {
            List($articles, id: \.self) { $article in
                Text(article)
            }
            .refreshable {
                articles.append("New Article")
            }
            .navigationTitle("Article List")
        }
    }
}