[atlasduo]

It is the same approach as declarative UI programming like SwiftUI or QML, but with an extra GUI abstraction on top of it. An artifact of this GUI-driven development process (like Xcode or Glade) is still a file with some declarative markup (sometimes even human-readable).

[steve1977]

> An artifact of this GUI-driven development process (like Xcode or Glade) is still a file with some declarative markup

Not really in the case of Cocoa's Interface Builder (nib/xib files). There the artifact is basically a marshalled object tree of the actual UI objects, not declarative markup.

[treprinum]

There is a big qualitative jump when one can arrange and play with UI without writing a single line of code, even if the user's decisions about component placement are recorded in a declarative file.