ScrollViewとGeometryReaderでミッションの詳細を表示する
Showing mission details with ScrollView and GeometryReader

MissionView.swift</strong

import SwiftUI

struct MissionView: View {
    let mission: Mission

    var body: some View {
        GeometryReader { geometry in
            ScrollView(.vertical) {
                VStack {
                    Image(self.mission.image)
                        .resizable()
                        .scaledToFit()
                        .frame(maxWidth: geometry.size.width * 0.7)
                        .padding(.top)

                    Text(self.mission.description)
                        .padding()

                    Spacer(minLength: 25)
                }
            }
        }
        .navigationBarTitle(Text(mission.displayName), displayMode: .inline)
    }
}

struct MissionView_Previews: PreviewProvider {
    static let missions: [Mission] = Bundle.main.decode("missions.json")

    static var previews: some View {
        MissionView(mission: missions[0])
    }
}

first（where :)を使用したCodable構造体のマージ
Merging Codable structs using first(where:)

first(where:)

import SwiftUI

struct MissionView: View {
    //----------------
    struct CrewMember {
        let role: String
        let astronaut: Astronaut
    }
    let astronauts: [CrewMember]
    let mission: Mission
    //----------------
    init(mission: Mission, astronauts: [Astronaut]) {
        self.mission = mission

        var matches = [CrewMember]()

        for member in mission.crew {
            if let match = astronauts.first(where: { $0.id == member.name }) {
                matches.append(CrewMember(role: member.role, astronaut: match))
            } else {
                fatalError("Missing \(member)")
            }
        }

        self.astronauts = matches
    }
    //----------------
    var body: some View {
        GeometryReader { geometry in
            ScrollView(.vertical) {
                VStack {
                    Image(self.mission.image)
                        .resizable()
                        .scaledToFit()
                        .frame(maxWidth: geometry.size.width * 0.7)
                        .padding(.top)

                    Text(self.mission.description)
                        .padding()
                    
                    ForEach(self.astronauts, id: \.role) { crewMember in
                        NavigationLink(destination: AstronautView(astronaut: crewMember.astronaut)) {
                            HStack {
                                Image(crewMember.astronaut.id)
                                    .resizable()
                                    .frame(width: 83, height: 60)
                                    .clipShape(Capsule())
                                    .overlay(Capsule().stroke(Color.primary, lineWidth: 1))

                                VStack(alignment: .leading) {
                                    Text(crewMember.astronaut.name)
                                        .font(.headline)
                                    Text(crewMember.role)
                                        .foregroundColor(.secondary)
                                }

                                Spacer()
                            }
                            .padding(.horizontal)
                        
                        }.buttonStyle(PlainButtonStyle())
                    }
                    Spacer(minLength: 25)
                }
            }
        }
        .navigationBarTitle(Text(mission.displayName), displayMode: .inline)
    }
}

struct MissionView_Previews: PreviewProvider {
    static let missions: [Mission] = Bundle.main.decode("missions.json")
    static let astronauts: [Astronaut] = Bundle.main.decode("astronauts.json")

    static var previews: some View {
        MissionView(mission: missions[0], astronauts: astronauts)
    }
}

buttonStyle（）およびlayoutPriority（）の問題の修正
Fixing problems with buttonStyle() and layoutPriority()

↑
2番目のバグについては、まったく表示されなかった可能性もあります。これは、SwiftUI自体のバグのようです。そのため、将来のリリースで修正されるか、特定のデバイスにのみ影響する可能性があります構成。したがって、私と同じiPhoneシミュレーターを使用しているときにこのバグが存在しない場合は、解決されている可能性があります。