How to get user selected text in SwiftUI TextEditor - swift

Question

I have this code and I need to get user-selected text from TextEditor. How do I do such a thing in SwiftUI?
struct ContentView: View {
#Binding var document: AppDocument
var body: some View {
TextEditor(text: $document.text)
.disableAutocorrection(true)
}
}

Answer 1

While added in iOS 15 .textSelection modifier enables the end-user of an app to select and copy text, it doesn't help the developer obtain user-selected text or range of selection. I don't think that, as of early 2022, there is a way to do it natively in SwiftUI.
However, UIKit's UITextView has selectedRange property, and UITextViewDelegate has textViewDidChangeSelection(_:) method that fires off every time the user changes the selection. To use that in SwiftUI, we need to build a bridge using UIViewRepresentable protocol like so:
struct ContentView: View {
#State private var text = ""
var body: some View {
UITextViewRepresentable(text: $text)
}
}
struct UITextViewRepresentable: UIViewRepresentable {
let textView = UITextView()
#Binding var text: String
func makeUIView(context: Context) -> UITextView {
textView.delegate = context.coordinator
return textView
}
func updateUIView(_ uiView: UITextView, context: Context) {
// SwiftUI -> UIKit
uiView.text = text
}
func makeCoordinator() -> Coordinator {
Coordinator(text: $text)
}
class Coordinator: NSObject, UITextViewDelegate {
#Binding var text: String
init(text: Binding<String>) {
self._text = text
}
func textViewDidChange(_ textView: UITextView) {
// UIKit -> SwiftUI
_text.wrappedValue = textView.text
}
func textViewDidChangeSelection(_ textView: UITextView) {
// Fires off every time the user changes the selection.
print(textView.selectedRange)
}
}
}