Improve editor scrolling on ios (#229)

* Unset isScrollEnabled property on UITextViews

* Begin implementing common MultilineTextView

* Remove legacy text views

* Fix firstResponder issues

* Bump version and build number and update change log

* Fix smart-dashes replacement in MultilineTextView

* Wait 10ms before navigating to the editor after creating a new post

* Wait before navigating to editor after creating a new post

* Bump build number

CHANGELOG.md

@@ -44,6 +44,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - [Mac] Fixed a bug where alerts weren't presented for login errors.
 - [Mac] Fixed some build warnings in the project.
 - [Mac] Bumped WriteFreely package to v0.3.6 to handle decoding of fractional seconds in dates.
+- [iOS] Fixed an issue that made it tricky to scroll in the post editor.
+- [iOS] Fixed a bug that didn't navigate to the post editor after tapping the new-post button. 
 
 ## [1.0.12-ios] - 2022-10-06
 

Shared/PostList/PostListView.swift

@@ -47,8 +47,10 @@ struct PostListView: View {
                                 let managedPost = model.editor.generateNewLocalPost(withFont: model.preferences.font)
                                 withAnimation {
                                     self.model.showAllPosts = false
+                                    DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
                                         self.model.selectedPost = managedPost
                                     }
+                                }
                             }, label: {
                                 ZStack {
                                     Image("does.not.exist")

Shared/PostList/PostStatusBadgeView.swift

@@ -14,7 +14,7 @@ struct PostStatusBadgeView: View {
             .padding(EdgeInsets(top: 2.5, leading: 7.5, bottom: 2.5, trailing: 7.5))
             .background(badgeColor)
             .clipShape(RoundedRectangle(cornerRadius: 5.0, style: .circular))
-            .frame(width: .infinity)
+            .frame(maxWidth: .infinity)
     }
 
     func setupBadgeProperties(for status: PostStatus) -> (String, Color) {

WriteFreely-MultiPlatform.xcodeproj/project.pbxproj

@@ -90,8 +90,6 @@
 		17A5388F24DDEC7400DEFF9A /* AccountView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 17A5388D24DDEC7400DEFF9A /* AccountView.swift */; };
 		17A5389324DDED0000DEFF9A /* PreferencesView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 17A5389124DDED0000DEFF9A /* PreferencesView.swift */; };
 		17A67CAF251A5DD7002F163D /* PostEditorView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 17A67CAE251A5DD7002F163D /* PostEditorView.swift */; };
-		17AD0A5E25489E810057D763 /* PostTitleTextView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 17AD0A5D25489E810057D763 /* PostTitleTextView.swift */; };
-		17AD0A6425489E900057D763 /* PostBodyTextView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 17AD0A6325489E900057D763 /* PostBodyTextView.swift */; };
 		17B37C4B25C8661300FE75E9 /* WriteFreelyModel+Keychain.swift in Sources */ = {isa = PBXBuildFile; fileRef = 17B37C4A25C8661300FE75E9 /* WriteFreelyModel+Keychain.swift */; };
 		17B37C4C25C8661300FE75E9 /* WriteFreelyModel+Keychain.swift in Sources */ = {isa = PBXBuildFile; fileRef = 17B37C4A25C8661300FE75E9 /* WriteFreelyModel+Keychain.swift */; };
 		17B37C5625C8679800FE75E9 /* WriteFreelyModel+API.swift in Sources */ = {isa = PBXBuildFile; fileRef = 17B37C5525C8679800FE75E9 /* WriteFreelyModel+API.swift */; };
@@ -138,6 +136,7 @@
 		17DFDE8B251D309400A25F31 /* OpenSans-License.txt in Resources */ = {isa = PBXBuildFile; fileRef = 17DFDE86251D309400A25F31 /* OpenSans-License.txt */; };
 		17DFDE8C251D309400A25F31 /* OpenSans-License.txt in Resources */ = {isa = PBXBuildFile; fileRef = 17DFDE86251D309400A25F31 /* OpenSans-License.txt */; };
 		17E5DF8A2543610700DCDC9B /* PostTextEditingView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 17E5DF892543610700DCDC9B /* PostTextEditingView.swift */; };
+		375A67E828FC555C007A1AC0 /* MultilineTextView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 375A67E728FC555C007A1AC0 /* MultilineTextView.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -227,8 +226,6 @@
 		17A5388D24DDEC7400DEFF9A /* AccountView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AccountView.swift; sourceTree = "<group>"; };
 		17A5389124DDED0000DEFF9A /* PreferencesView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PreferencesView.swift; sourceTree = "<group>"; };
 		17A67CAE251A5DD7002F163D /* PostEditorView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PostEditorView.swift; sourceTree = "<group>"; };
-		17AD0A5D25489E810057D763 /* PostTitleTextView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PostTitleTextView.swift; sourceTree = "<group>"; };
-		17AD0A6325489E900057D763 /* PostBodyTextView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PostBodyTextView.swift; sourceTree = "<group>"; };
 		17B37C4A25C8661300FE75E9 /* WriteFreelyModel+Keychain.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "WriteFreelyModel+Keychain.swift"; sourceTree = "<group>"; };
 		17B37C5525C8679800FE75E9 /* WriteFreelyModel+API.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "WriteFreelyModel+API.swift"; sourceTree = "<group>"; };
 		17B37C5C25C8698900FE75E9 /* WriteFreelyModel+APIHandlers.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "WriteFreelyModel+APIHandlers.swift"; sourceTree = "<group>"; };
@@ -270,6 +267,7 @@
 		17DFDE85251D309400A25F31 /* Lora-Cyrillic-OFL.txt */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = "Lora-Cyrillic-OFL.txt"; sourceTree = "<group>"; };
 		17DFDE86251D309400A25F31 /* OpenSans-License.txt */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = "OpenSans-License.txt"; sourceTree = "<group>"; };
 		17E5DF892543610700DCDC9B /* PostTextEditingView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PostTextEditingView.swift; sourceTree = "<group>"; };
+		375A67E728FC555C007A1AC0 /* MultilineTextView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MultilineTextView.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -436,8 +434,7 @@
 				1756AE7624CB2EDD00FD7257 /* PostEditorView.swift */,
 				173E19D0254318F600440F0F /* RemoteChangePromptView.swift */,
 				173E19E2254329CC00440F0F /* PostTextEditingView.swift */,
-				17AD0A5D25489E810057D763 /* PostTitleTextView.swift */,
+				375A67E728FC555C007A1AC0 /* MultilineTextView.swift */,
-				17AD0A6325489E900057D763 /* PostBodyTextView.swift */,
 			);
 			path = PostEditor;
 			sourceTree = "<group>";
@@ -926,13 +923,12 @@
 				17120DAC24E1B99F002B9F6C /* AccountLoginView.swift in Sources */,
 				17B37C4B25C8661300FE75E9 /* WriteFreelyModel+Keychain.swift in Sources */,
 				17480CA5251272EE00EB7765 /* Bundle+AppVersion.swift in Sources */,
-				17AD0A6425489E900057D763 /* PostBodyTextView.swift in Sources */,
 				17B37C5D25C8698900FE75E9 /* WriteFreelyModel+APIHandlers.swift in Sources */,
-				17AD0A5E25489E810057D763 /* PostTitleTextView.swift in Sources */,
 				17120DA924E1B2F5002B9F6C /* AccountLogoutView.swift in Sources */,
 				171BFDFA24D4AF8300888236 /* CollectionListView.swift in Sources */,
 				1756DBB324FECDBB00207AB8 /* PostEditorStatusToolbarView.swift in Sources */,
 				17120DB224E1E19C002B9F6C /* SettingsHeaderView.swift in Sources */,
+				375A67E828FC555C007A1AC0 /* MultilineTextView.swift in Sources */,
 				171DC677272C7D0B002B9B8A /* UserDefaults+Extensions.swift in Sources */,
 				1756DBB724FED3A400207AB8 /* LocalStorageModel.xcdatamodeld in Sources */,
 				17B996DA2502D23E0017B536 /* WFAPost+CoreDataProperties.swift in Sources */,
@@ -1054,7 +1050,7 @@
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++17";
 				CODE_SIGN_ENTITLEMENTS = "ActionExtension-iOS/ActionExtension-iOS.entitlements";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 680;
+				CURRENT_PROJECT_VERSION = 687;
 				DEVELOPMENT_TEAM = TPPAB4YBA6;
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_FILE = "ActionExtension-iOS/Info.plist";
@@ -1066,7 +1062,7 @@
 					"@executable_path/Frameworks",
 					"@executable_path/../../Frameworks",
 				);
-				MARKETING_VERSION = 1.0.12;
+				MARKETING_VERSION = 1.0.13;
 				PRODUCT_BUNDLE_IDENTIFIER = "com.abunchtell.WriteFreely-MultiPlatform.ActionExtension-iOS";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = iphoneos;
@@ -1085,7 +1081,7 @@
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++17";
 				CODE_SIGN_ENTITLEMENTS = "ActionExtension-iOS/ActionExtension-iOS.entitlements";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 680;
+				CURRENT_PROJECT_VERSION = 687;
 				DEVELOPMENT_TEAM = TPPAB4YBA6;
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_FILE = "ActionExtension-iOS/Info.plist";
@@ -1097,7 +1093,7 @@
 					"@executable_path/Frameworks",
 					"@executable_path/../../Frameworks",
 				);
-				MARKETING_VERSION = 1.0.12;
+				MARKETING_VERSION = 1.0.13;
 				PRODUCT_BUNDLE_IDENTIFIER = "com.abunchtell.WriteFreely-MultiPlatform.ActionExtension-iOS";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = iphoneos;
@@ -1228,7 +1224,7 @@
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CODE_SIGN_ENTITLEMENTS = "WriteFreely-MultiPlatform (iOS).entitlements";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 680;
+				CURRENT_PROJECT_VERSION = 687;
 				DEVELOPMENT_TEAM = TPPAB4YBA6;
 				ENABLE_PREVIEWS = YES;
 				INFOPLIST_FILE = iOS/Info.plist;
@@ -1237,7 +1233,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				MARKETING_VERSION = 1.0.12;
+				MARKETING_VERSION = 1.0.13;
 				PRODUCT_BUNDLE_IDENTIFIER = "com.abunchtell.WriteFreely-MultiPlatform";
 				PRODUCT_NAME = "WriteFreely-MultiPlatform";
 				SDKROOT = iphoneos;
@@ -1254,7 +1250,7 @@
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CODE_SIGN_ENTITLEMENTS = "WriteFreely-MultiPlatform (iOS).entitlements";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 680;
+				CURRENT_PROJECT_VERSION = 687;
 				DEVELOPMENT_TEAM = TPPAB4YBA6;
 				ENABLE_PREVIEWS = YES;
 				INFOPLIST_FILE = iOS/Info.plist;
@@ -1263,7 +1259,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				MARKETING_VERSION = 1.0.12;
+				MARKETING_VERSION = 1.0.13;
 				PRODUCT_BUNDLE_IDENTIFIER = "com.abunchtell.WriteFreely-MultiPlatform";
 				PRODUCT_NAME = "WriteFreely-MultiPlatform";
 				SDKROOT = iphoneos;
@@ -1282,7 +1278,7 @@
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				CURRENT_PROJECT_VERSION = 676;
+				CURRENT_PROJECT_VERSION = 687;
 				DEVELOPMENT_TEAM = TPPAB4YBA6;
 				ENABLE_HARDENED_RUNTIME = YES;
 				ENABLE_PREVIEWS = YES;
@@ -1309,7 +1305,7 @@
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				CURRENT_PROJECT_VERSION = 676;
+				CURRENT_PROJECT_VERSION = 687;
 				DEVELOPMENT_TEAM = TPPAB4YBA6;
 				ENABLE_HARDENED_RUNTIME = YES;
 				ENABLE_PREVIEWS = YES;
@@ -1489,7 +1485,7 @@
 			repositoryURL = "https://github.com/sparkle-project/Sparkle";
 			requirement = {
 				kind = upToNextMinorVersion;
-				minimumVersion = 2.0.0;
+				minimumVersion = 2.3.0;
 			};
 		};
 /* End XCRemoteSwiftPackageReference section */

iOS/PostEditor/MultilineTextView.swift

@@ -0,0 +1,159 @@
+// Credit: https://stackoverflow.com/a/58639072
+
+import SwiftUI
+import UIKit
+
+private struct UITextViewWrapper: UIViewRepresentable {
+    typealias UIViewType = UITextView
+
+    @Binding var text: String
+    @Binding var calculatedHeight: CGFloat
+    @Binding var isEditing: Bool
+    var textStyle: UIFont
+    var onDone: (() -> Void)?
+
+    func makeUIView(context: UIViewRepresentableContext<UITextViewWrapper>) -> UITextView {
+        let textField = UITextView()
+        textField.delegate = context.coordinator
+
+        textField.isEditable = true
+        textField.font = UIFont.preferredFont(forTextStyle: .body)
+        textField.isSelectable = true
+        textField.isUserInteractionEnabled = true
+        textField.isScrollEnabled = false
+        textField.backgroundColor = UIColor.clear
+        textField.smartDashesType = .no
+
+        let font = textStyle
+        let fontMetrics = UIFontMetrics(forTextStyle: .largeTitle)
+        textField.font = fontMetrics.scaledFont(for: font)
+
+        if nil != onDone {
+            textField.returnKeyType = .next
+        }
+
+        textField.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
+        return textField
+    }
+
+    func updateUIView(_ uiView: UITextView, context: UIViewRepresentableContext<UITextViewWrapper>) {
+        if uiView.text != self.text {
+            uiView.text = self.text
+        }
+
+        if uiView.window != nil, isEditing {
+            uiView.becomeFirstResponder()
+        }
+
+        UITextViewWrapper.recalculateHeight(view: uiView, result: $calculatedHeight)
+    }
+
+    fileprivate static func recalculateHeight(view: UIView, result: Binding<CGFloat>) {
+        let newSize = view.sizeThatFits(CGSize(width: view.frame.size.width, height: CGFloat.greatestFiniteMagnitude))
+        if result.wrappedValue != newSize.height {
+            DispatchQueue.main.async {
+                result.wrappedValue = newSize.height // !! must be called asynchronously
+            }
+        }
+    }
+
+    func makeCoordinator() -> Coordinator {
+        return Coordinator(text: $text, height: $calculatedHeight, isFirstResponder: $isEditing, onDone: onDone)
+    }
+
+    final class Coordinator: NSObject, UITextViewDelegate {
+        @Binding var isFirstResponder: Bool
+        var text: Binding<String>
+        var calculatedHeight: Binding<CGFloat>
+        var onDone: (() -> Void)?
+
+        init(
+            text: Binding<String>,
+            height: Binding<CGFloat>,
+            isFirstResponder: Binding<Bool>,
+            onDone: (() -> Void)? = nil
+        ) {
+            self.text = text
+            self.calculatedHeight = height
+            self._isFirstResponder = isFirstResponder
+            self.onDone = onDone
+        }
+
+        func textViewDidChange(_ uiView: UITextView) {
+            text.wrappedValue = uiView.text
+            UITextViewWrapper.recalculateHeight(view: uiView, result: calculatedHeight)
+        }
+
+        func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
+            if let onDone = self.onDone, text == "\n" {
+                textView.resignFirstResponder()
+                onDone()
+                return false
+            }
+            return true
+        }
+
+        func textViewDidEndEditing(_ textView: UITextView) {
+            self.isFirstResponder = false
+        }
+    }
+
+}
+
+struct MultilineTextField: View {
+
+    private var placeholder: String
+    private var textStyle: UIFont
+    private var onCommit: (() -> Void)?
+
+    @Binding var isFirstResponder: Bool
+    @Binding private var text: String
+    private var internalText: Binding<String> {
+        Binding<String>(get: { self.text }) {   // swiftlint:disable:this multiple_closures_with_trailing_closure
+            self.text = $0
+            self.showingPlaceholder = $0.isEmpty
+        }
+    }
+
+    @State private var dynamicHeight: CGFloat = 100
+    @State private var showingPlaceholder = false
+
+    init (
+        _ placeholder: String = "",
+        text: Binding<String>,
+        font: UIFont,
+        isFirstResponder: Binding<Bool>,
+        onCommit: (() -> Void)? = nil
+    ) {
+        self.placeholder = placeholder
+        self.onCommit = onCommit
+        self.textStyle = font
+        self._isFirstResponder = isFirstResponder
+        self._text = text
+        self._showingPlaceholder = State<Bool>(initialValue: self.text.isEmpty)
+    }
+
+    var body: some View {
+        UITextViewWrapper(
+            text: self.internalText,
+            calculatedHeight: $dynamicHeight,
+            isEditing: $isFirstResponder,
+            textStyle: textStyle,
+            onDone: onCommit
+        )
+        .frame(minHeight: dynamicHeight, maxHeight: dynamicHeight)
+        .background(placeholderView, alignment: .topLeading)
+    }
+
+    var placeholderView: some View {
+        Group {
+            if showingPlaceholder {
+                let font = Font(textStyle)
+                Text(placeholder).foregroundColor(.gray)
+                    .padding(.leading, 4)
+                    .padding(.top, 8)
+                    .font(font)
+            }
+        }
+    }
+}

iOS/PostEditor/PostBodyTextView.swift

@@ -1,134 +0,0 @@
-// Based on https://stackoverflow.com/a/56508132 and https://stackoverflow.com/a/48360549
-
-import SwiftUI
-
-class PostBodyCoordinator: NSObject, UITextViewDelegate, NSLayoutManagerDelegate {
-    @Binding var text: String
-    @Binding var isFirstResponder: Bool
-    var lineSpacingMultiplier: CGFloat
-    var didBecomeFirstResponder: Bool = false
-    var postBodyTextView: PostBodyTextView
-
-    weak var textView: UITextView?
-
-    init(
-        _ textView: PostBodyTextView,
-        text: Binding<String>,
-        isFirstResponder: Binding<Bool>,
-        lineSpacingMultiplier: CGFloat
-    ) {
-        self.postBodyTextView = textView
-        _text = text
-        _isFirstResponder = isFirstResponder
-        self.lineSpacingMultiplier = lineSpacingMultiplier
-
-        super.init()
-
-        updateSize()
-    }
-
-    func updateSize() {
-        DispatchQueue.main.async {
-            guard let view = self.textView else { return }
-            let size = view.sizeThatFits(view.bounds.size)
-            if self.postBodyTextView.height != size.height {
-                self.postBodyTextView.height = size.height
-            }
-        }
-    }
-
-    func textViewDidChange(_ textView: UITextView) {
-        DispatchQueue.main.async {
-            self.postBodyTextView.text = textView.text ?? ""
-        }
-    }
-
-    func textViewDidEndEditing(_ textView: UITextView) {
-        self.isFirstResponder = false
-        self.didBecomeFirstResponder = false
-    }
-
-    func layoutManager(
-        _ layoutManager: NSLayoutManager,
-        didCompleteLayoutFor textContainer: NSTextContainer?,
-        atEnd layoutFinishedFlag: Bool
-    ) {
-        updateSize()
-    }
-
-    func layoutManager(
-        _ layoutManager: NSLayoutManager,
-        lineSpacingAfterGlyphAt glyphIndex: Int,
-        withProposedLineFragmentRect rect: CGRect
-    ) -> CGFloat {
-        // HACK: - This seems to be the only way to get line spacing to update dynamically on iPad
-        //         when switching between full-screen, split-screen, and slide-over views.
-        if let window = UIApplication.shared.windows.filter({ $0.isKeyWindow }).first {
-            // Get the width of the window to determine the size class
-            if window.frame.width < 600 {
-                // Use 0.25 multiplier for compact size class
-                return 17 * 0.25
-            } else {
-                // Use 0.5 multiplier otherwise
-                return 17 * 0.5
-            }
-        } else {
-            return 17 * lineSpacingMultiplier
-        }
-    }
-}
-
-struct PostBodyTextView: UIViewRepresentable {
-    @Binding var text: String
-    @Binding var textStyle: UIFont
-    @Binding var height: CGFloat
-    @Binding var isFirstResponder: Bool
-    @State var lineSpacing: CGFloat
-
-    func makeUIView(context: UIViewRepresentableContext<PostBodyTextView>) -> UITextView {
-        let textView = UITextView()
-
-        textView.isEditable = true
-        textView.isUserInteractionEnabled = true
-        textView.isScrollEnabled = true
-        textView.alwaysBounceVertical = false
-        textView.smartDashesType = .no
-
-        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() -> PostBodyCoordinator {
-        return Coordinator(
-            self,
-            text: $text,
-            isFirstResponder: $isFirstResponder,
-            lineSpacingMultiplier: lineSpacing
-        )
-    }
-
-    func updateUIView(_ uiView: UITextView, context: UIViewRepresentableContext<PostBodyTextView>) {
-        if uiView.text != text {
-            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
-        }
-    }
-}

iOS/PostEditor/PostTextEditingView.swift

@@ -7,8 +7,6 @@ struct PostTextEditingView: View {
     @Binding var updatingBodyFromServer: Bool
     @State private var appearance: PostAppearance = .serif
     @State private var titleTextStyle: UIFont = UIFont(name: "Lora-Regular", size: 26)!
-    @State private var titleTextHeight: CGFloat = 50
-    @State private var bodyTextHeight: CGFloat = 50
     @State private var titleIsFirstResponder: Bool = true
     @State private var bodyTextStyle: UIFont = UIFont(name: "Lora-Regular", size: 17)!
     @State private var bodyIsFirstResponder: Bool = false
@@ -26,42 +24,17 @@ struct PostTextEditingView: View {
         UITextView.appearance().backgroundColor = .clear
     }
 
-    var titleFieldHeight: CGFloat {
-        let minHeight: CGFloat = textEditorHeight
-        if titleTextHeight < minHeight {
-            return minHeight
-        }
-        return titleTextHeight
-    }
-    var bodyFieldHeight: CGFloat {
-        let minHeight: CGFloat = textEditorHeight
-        if bodyTextHeight < minHeight {
-            return minHeight
-        }
-        return bodyTextHeight
-    }
-
     var body: some View {
         ScrollView(.vertical) {
-            ZStack(alignment: .topLeading) {
+            MultilineTextField(
-                if post.title.count == 0 {
+                "Title (optional)",
-                    Text("Title (optional)")
-                        .font(Font(titleTextStyle))
-                        .foregroundColor(Color(UIColor.placeholderText))
-                        .padding(.horizontal, 4)
-                        .padding(.vertical, 8)
-                        .accessibilityHidden(true)
-                }
-                PostTitleTextView(
                 text: $post.title,
-                    textStyle: $titleTextStyle,
+                font: titleTextStyle,
-                    height: $titleTextHeight,
                 isFirstResponder: $titleIsFirstResponder,
-                    lineSpacing: horizontalSizeClass == .compact ? lineSpacingMultiplier / 2 : lineSpacingMultiplier
+                onCommit: didFinishEditingTitle
             )
             .accessibilityLabel(Text("Title (optional)"))
             .accessibilityHint(Text("Add or edit the title for your post; use the Return key to skip to the body"))
-                .frame(height: titleFieldHeight)
             .onChange(of: post.title) { _ in
                 if post.status == PostStatus.published.rawValue && !updatingTitleFromServer {
                     post.status = PostStatus.edited.rawValue
@@ -70,24 +43,12 @@ struct PostTextEditingView: View {
                     updatingTitleFromServer = false
                 }
             }
-            }
+            MultilineTextField(
-            ZStack(alignment: .topLeading) {
+                "Write...",
-                if post.body.count == 0 {
-                    Text("Write…")
-                        .font(Font(bodyTextStyle))
-                        .foregroundColor(Color(UIColor.placeholderText))
-                        .padding(.horizontal, 4)
-                        .padding(.vertical, 8)
-                        .accessibilityHidden(true)
-                }
-                PostBodyTextView(
                 text: $post.body,
-                    textStyle: $bodyTextStyle,
+                font: bodyTextStyle,
-                    height: $bodyTextHeight,
+                isFirstResponder: $bodyIsFirstResponder
-                    isFirstResponder: $bodyIsFirstResponder,
-                    lineSpacing: horizontalSizeClass == .compact ? lineSpacingMultiplier / 2 : lineSpacingMultiplier
             )
-                .frame(height: bodyFieldHeight)
             .accessibilityLabel(Text("Body"))
             .accessibilityHint(Text("Add or edit the body of your post"))
             .onChange(of: post.body) { _ in
@@ -99,7 +60,6 @@ struct PostTextEditingView: View {
                 }
             }
         }
-        }
         .onChange(of: titleIsFirstResponder, perform: { _ in
             self.bodyIsFirstResponder.toggle()
         })
@@ -116,4 +76,9 @@ struct PostTextEditingView: View {
             self.bodyTextStyle = UIFont(name: appearance.rawValue, size: 17)!
         })
     }
+
+    private func didFinishEditingTitle() {
+        self.titleIsFirstResponder = false
+        self.bodyIsFirstResponder = true
+    }
 }

iOS/PostEditor/PostTitleTextView.swift

@@ -1,129 +0,0 @@
-// Based on https://lostmoa.com/blog/DynamicHeightForTextFieldInSwiftUI and https://stackoverflow.com/a/56508132
-
-import SwiftUI
-
-class PostTitleCoordinator: NSObject, UITextViewDelegate, NSLayoutManagerDelegate {
-    @Binding var text: String
-    @Binding var isFirstResponder: Bool
-    var lineSpacingMultiplier: CGFloat
-    var didBecomeFirstResponder: Bool = false
-    var postTitleTextView: PostTitleTextView
-
-    weak var textView: UITextView?
-
-    init(
-        _ textView: PostTitleTextView,
-        text: Binding<String>,
-        isFirstResponder: Binding<Bool>,
-        lineSpacingMultiplier: CGFloat
-    ) {
-        self.postTitleTextView = textView
-        _text = text
-        _isFirstResponder = isFirstResponder
-        self.lineSpacingMultiplier = lineSpacingMultiplier
-    }
-
-    func textViewDidChange(_ 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()
-            self.didBecomeFirstResponder = false
-            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
-            }
-        }
-    }
-
-    func layoutManager(
-        _ layoutManager: NSLayoutManager,
-        lineSpacingAfterGlyphAt glyphIndex: Int,
-        withProposedLineFragmentRect rect: CGRect
-    ) -> CGFloat {
-        // HACK: - This seems to be the only way to get line spacing to update dynamically on iPad
-        //         when switching between full-screen, split-screen, and slide-over views.
-        if let window = UIApplication.shared.windows.filter({ $0.isKeyWindow }).first {
-            // Get the width of the window to determine the size class
-            if window.frame.width < 600 {
-                // Use 0.25 multiplier for compact size class
-                return 17 * 0.25
-            } else {
-                // Use 0.5 multiplier otherwise
-                return 17 * 0.5
-            }
-        } else {
-            return 17 * lineSpacingMultiplier
-        }
-    }
-}
-
-struct PostTitleTextView: UIViewRepresentable {
-    @Binding var text: String
-    @Binding var textStyle: UIFont
-    @Binding var height: CGFloat
-    @Binding var isFirstResponder: Bool
-    @State var lineSpacing: CGFloat
-
-    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() -> PostTitleCoordinator {
-        return Coordinator(
-            self,
-            text: $text,
-            isFirstResponder: $isFirstResponder,
-            lineSpacingMultiplier: lineSpacing
-        )
-    }
-
-    func updateUIView(_ uiView: UITextView, context: UIViewRepresentableContext<PostTitleTextView>) {
-        if uiView.text != text {
-            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
-        }
-    }
-}