swiftui - 选取器中所选项目的背景

Question

我有一个看起来像这样的选择器：

代码是这样的：

 @State var typeSelection: String = "Socialism"
    var typeOptions = ["Socialism", "Democratic Socialism", "Capitalism", "Authoritarianism"]

...

  Picker("Please pick a Type", selection: $typeSelection) {
                   ForEach(typeOptions, id: \.self) {
                        Text($0)
                            .foregroundColor(.white)
                            .font(.system(size: 30, weight: .medium, design: .default))
                    }
                }

如何使所选颜色的背景颜色变深，例如说它的不透明度现在是黑色的 30%，我如何将其提高到 70%？

标签： swiftui