SwiftUI – State change in UITextField causes the frameWidth to grow uncontrolled and ignore bounds/frame
You need to decrease priority of content resistance in makeUIView (so content would not push external layout set in SwiftUI) like below func makeUIView(context: UIViewRepresentableContext<MyField>) -> UITextField { let field = UITextField(frame: .zero) field.setContentCompressionResistancePriority(.defaultLow, for: .horizontal) …