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
    }

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:

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()
    }
}

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
    }

(SwiftUI / Xcode 11)

1 .background(Color.black) //系统颜色

2 .background(Color("green")) //用于您在Assets.xcassets中创建的颜色

或者你可以用Command+Click在元素上改变它。

希望能有所帮助:)

我喜欢声明一个修饰符来改变视图的背景颜色。

extension View {
  func background(with color: Color) -> some View {
    background(GeometryReader { geometry in
      Rectangle().path(in: geometry.frame(in: .local)).foregroundColor(color)
    })
  }
}

然后我通过将颜色传递给视图来使用修饰符。

struct Content: View {

  var body: some View {
    Text("Foreground Label").foregroundColor(.green).background(with: .black)
  }

}