Traps

Don't use @QuickLayout macro on UIViewControllers

See this page for integration with UIViewControllers.

@QuickLayout /// <-- 🛑 Don't use the macro on UIViewControllers
final class MyViewController: UIViewController {

  var body: Layout {
    ...
  }
}

DON'T

When using @QuickLayout, don't call body.applyFrame(). This will result in double measurements.

@QuickLayout
final class VerySlowView: UIView {

  var body: Layout {
    ...
  }

  /// @QuickLayout macro will insert additional
  /// _QuickLayoutViewImplementation call into this method.
  override func layoutSubviews() {
    super.layoutSubviews()
    body.applyFrame(self.bounds) /// <-- 🛑 Don't call applyFrame when using @QuickLayout macro
  }
}

Don't create views in the body

@QuickLayout
final class MyView: UIView {

  var body: Layout {
    HStack {
      UIView() /// <-- 🛑 Don't create views in the body
    }
  }
}