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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?
633
Unless otherwise specified, a member declared within a class is an instance member. So instanceInteger and instanceMethod are both instance members. The runtime system creates one copy of each instance variable for each instance of a class created by a program.
Instance Variable cannot have a Static modifier as it will become a Class level variable. Meaning STATIC is one of the keyword which cannot be used with Instance variable.
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")) If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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