首先，你应该使用

 ZStack {
      Color("Desired_color_name").ignoresSafeArea()
// if you create any color set then give that colour set name
// otherwise use Color.gray or as you want the colour name
    
     //Here you should start your design
    }

你可以这样做:

.background(Color.black)

围绕着你的视野。

如。从默认模板(我把它包围在一个组):

    var body: some View {
        VStack {
          Text("Hello SwiftUI!")
        }
       .background(Color.black)
    }

为了添加一些不透明度，你也可以添加.opacity方法:

.background(Color.black.opacity(0.5))

你也可以通过CMD +单击视图，然后单击Show SwiftUI Inspector > Background > Your Color来使用视图的inspect元素

Xcode 11.5

简单地使用ZStack添加背景颜色或图像到你的SwiftUI的主视图

struct ContentView: View {
    var body: some View {
        ZStack {
            Color.black
        }
        .edgesIgnoringSafeArea(.vertical)
    }
}

首先，你应该使用

 ZStack {
      Color("Desired_color_name").ignoresSafeArea()
// if you create any color set then give that colour set name
// otherwise use Color.gray or as you want the colour name
    
     //Here you should start your design
    }

要制作一个中央/可重用的后台小部件，您可以这样做-

import SwiftUI
struct BgView<Content>: View where Content: View {
        private let content: Content
    
        public init(@ViewBuilder content: () -> Content) {
            self.content = content()
        }
    
        var body : some View {
            ZStack {
              Color.black.ignoresSafeArea()
                content
            }
          } 
    }

并且可以像下面这样轻松地在所有视图中使用-

import SwiftUI

struct TestView: View {
    var body: some View {
      BgView{
        Text("Hello, World!")
      }.foregroundColor(.white)
    }
}

struct TestView_Previews: PreviewProvider {
    static var previews: some View {
        TestView()
    }
}

解决方案:

你可以创建一个彩色视图，并将其设置为VStack背景。

struct ColoredView: UIViewRepresentable {
    var color: Color
    func makeUIView(context: Context) -> UIView {
        let view = UIView()
        view.backgroundColor = UIColor(color)
        DispatchQueue.main.async {
            view.superview?.superview?.backgroundColor = .clear
        }
        return view
    }
    func updateUIView(_ uiView: UIView, context: Context) {}
}

用法:

 VStack {
    Text("VStack with Red backgound")
    Text("VStack with Red backgound")
    Text("VStack with Red backgound")
    Text("VStack with Red backgound")
 }.background(ColoredView(color: .red))

结果: