> I have no doubt that a future bottom up redo of a UI component framework (UIMS) will embrace constraints for both document and form layout. Welcome to the fu

> I have no doubt that a future bottom up redo of a UI component framework (UIMS) will embrace constraints for both document and form layout. Welcome to the future! Cocoa's new(ish) layout system, Auto Layout, is constraint based. > Partially because the UI components do not have the built-in smarts, such as anchors for text baselines. In Cocoa, you can constrain two views to align by baseline, and each view handles what "baseline" means for itself. Built in views (labels, buttons, etc.) behave as you'd expect.