我希望为我正在关注的教程添加一个带有标题的导航栏

Question

import SwiftUI

struct ContentView: View {
    var emojis = ["🚂", "🚀", "🚁", "🚜", "🛸", "🛳", "🚗", "🏎", "🚲", "✈️", "🦽", "🏍", "🚌", "🚚", "🛺", "🚤", "⛵️", "🚔", "🛴", "🚐", "🚓", "🛻", "🚇", "🛰"]
    
    @State var emojiCount = 20
    
    
    var body: some View {
        VStack {
            ScrollView {
                LazyVGrid(columns: [GridItem(.adaptive(minimum: 65))]) {
                    ForEach(emojis[0..<emojiCount], id: \.self) { emoji in
                        CardView(content: emoji).aspectRatio(2/3, contentMode: .fit)
                    }
                }
            }
            .foregroundColor(.red)
            Spacer()
            HStack {
                remove
                Spacer()
                add
                
            }
            .font(.largeTitle)
            .padding(.horizontal)
        }
        .padding(.horizontal)
    }
    var remove: some View {
        Button {
            if emojiCount > 1 {
                emojiCount -= 1
            }
        } label: {
            Image(systemName: "minus.circle")
        }
    }
    var add: some View {
        Button {
            if emojiCount < emojis.count {
                emojiCount += 1
            }
        } label: {
            Image(systemName: "plus.circle")
        }
    }
    
}



struct CardView: View {
    var content: String
    @State var isFaceUp: Bool = true
    
    var body: some View {
        ZStack {
            let shape = RoundedRectangle(cornerRadius: 20.0)
            if isFaceUp {
                shape.fill().foregroundColor(.white)
               shape.strokeBorder(lineWidth: 3.0)
                Text(content).font(.largeTitle)
            } else {
                shape.fill()
            }
        }
        .onTapGesture {
            isFaceUp = !isFaceUp
        }
    }
}

Answer 1

您是否尝试过将VStack添加到NavigationView，然后为其设置navigationTitle？

也许这样的事情应该有效：

var body: some View {
    NavigationView {
        VStack {
            ScrollView {
                LazyVGrid(columns: [GridItem(.adaptive(minimum: 65))]) {
                    ForEach(emojis[0..<emojiCount], id: \.self) { emoji in
                        CardView(content: emoji).aspectRatio(2/3, contentMode: .fit)
                    }
                }
            }
            .foregroundColor(.red)
            Spacer()
            HStack {
                remove
                Spacer()
                add
                
            }
            .font(.largeTitle)
            .padding(.horizontal)
        }
        .navigationTitle("Title here!")
        .padding(.horizontal)
    }
}