How to fix “Function declares an opaque return type, but has no return statements in its body from which to infer an underlying type”

Updated for Xcode 13.0 beta 2

This error occurs for two reasons. First, you’ve created a view but didn’t actually return it from your view body, like this:

var body: some View {
    let name = "Paul"
    let message = Text("Hello, \(name)")
}

To make that compile, add return message:

var body: some View {
    let name = "Paul"
    let message = Text("Hello, \(name)")
    return message
}

The other common reason this happens is if you try to return two views without placing them in a container, like this:

var message: some View {
    Text("Hello")
    Text("World")
}

To fix this, place your views in a stack or a group, like this:

var message: some View {
    VStack {
        Text("Hello")
        Text("World")
    }
}