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diff --git a/iOS/PostEditor/PostTitleTextView.swift b/iOS/PostEditor/PostTitleTextView.swift
index f36a2bb..c29f843 100644
--- a/iOS/PostEditor/PostTitleTextView.swift
+++ b/iOS/PostEditor/PostTitleTextView.swift
@@ -1,20 +1,95 @@
-//
-// PostTitleTextView.swift
-// WriteFreely-MultiPlatform (iOS)
-//
-// Created by Angelo Stavrow on 2020-10-27.
-//
+// Based on https://lostmoa.com/blog/DynamicHeightForTextFieldInSwiftUI/
+// and https://stackoverflow.com/a/56508132/1234545
import SwiftUI
-struct PostTitleTextView: View {
- var body: some View {
- Text(/*@START_MENU_TOKEN@*/"Hello, World!"/*@END_MENU_TOKEN@*/)
+class Coordinator: NSObject, UITextViewDelegate, NSLayoutManagerDelegate {
+ @Binding var text: String
+ @Binding var isFirstResponder: Bool
+ var didBecomeFirstResponder: Bool = false
+ var postTitleTextView: PostTitleTextView
+
+ weak var textView: UITextView?
+
+ init(_ textView: PostTitleTextView, text: Binding<String>, isFirstResponder: Binding<Bool>) {
+ self.postTitleTextView = textView
+ _text = text
+ _isFirstResponder = isFirstResponder
+ }
+
+ func textViewDidChangeSelection(_ textView: UITextView) {
+ DispatchQueue.main.async {
+ self.postTitleTextView.text = textView.text ?? ""
+ }
+ }
+
+ func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
+ if (text == "\n") {
+ self.isFirstResponder.toggle()
+ return false
+ }
+ return true
+ }
+
+ func layoutManager(
+ _ layoutManager: NSLayoutManager,
+ didCompleteLayoutFor textContainer: NSTextContainer?,
+ atEnd layoutFinishedFlag: Bool
+ ) {
+ DispatchQueue.main.async {
+ guard let view = self.textView else {
+ return
+ }
+ let size = view.sizeThatFits(view.bounds.size)
+ if self.postTitleTextView.height != size.height {
+ self.postTitleTextView.height = size.height
+ }
+ }
}
}
-struct PostTitleTextView_Previews: PreviewProvider {
- static var previews: some View {
- PostTitleTextView()
+struct PostTitleTextView: UIViewRepresentable {
+ @Binding var text: String
+ @Binding var textStyle: UIFont
+ @Binding var height: CGFloat
+ @Binding var isFirstResponder: Bool
+
+ func makeUIView(context: UIViewRepresentableContext<PostTitleTextView>) -> UITextView {
+ let textView = UITextView()
+
+ textView.isEditable = true
+ textView.isUserInteractionEnabled = true
+ textView.isScrollEnabled = true
+ textView.alwaysBounceVertical = false
+
+ context.coordinator.textView = textView
+ textView.delegate = context.coordinator
+ textView.layoutManager.delegate = context.coordinator
+
+ let font = textStyle
+ let fontMetrics = UIFontMetrics(forTextStyle: .largeTitle)
+ textView.font = fontMetrics.scaledFont(for: font)
+
+ textView.backgroundColor = UIColor.clear
+
+ return textView
+ }
+
+ func makeCoordinator() -> Coordinator {
+ return Coordinator(self, text: $text, isFirstResponder: $isFirstResponder)
+ }
+
+ func updateUIView(_ uiView: UITextView, context: UIViewRepresentableContext<PostTitleTextView>) {
+ uiView.text = text
+
+ let font = textStyle
+ let fontMetrics = UIFontMetrics(forTextStyle: .largeTitle)
+ uiView.font = fontMetrics.scaledFont(for: font)
+
+ // We don't want the text field to become first responder every time SwiftUI refreshes the view.
+ if isFirstResponder && !context.coordinator.didBecomeFirstResponder {
+ uiView.becomeFirstResponder()
+ context.coordinator.didBecomeFirstResponder = true
+ }
}
}

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