Instance member cannot be used on type in SwiftUI Preview

Question

Following error in my preview:

struct DetailView: View {     var header: DataProvider.DataHeader      var body: some View {         Text("...")     } }  struct DetailView_Previews: PreviewProvider {     var a = DataProvider.DataHeader(title: "a", text: "b")      static var previews: some View {         DetailView(header: a)     } } 

Error is:

Instance member 'a' cannot be used on type 'DetailView_Previews' 

Why this is happening?

Answer 1

It is due to static var preview,

so use either static as well

static var a = DataProvider.DataHeader(title: "a", text: "b") 

or construct in place

DetailView(header: DataProvider.DataHeader(title: "a", text: "b"))