feat：分享功能

2026-06-23 10:42:14 +08:00
parent d59c3212b8
commit aeb7ebd642
6 changed files with 196 additions and 17 deletions
@@ -0,0 +1,74 @@
+// ignore_for_file: use_build_context_synchronously
+
+import 'dart:typed_data';
+import 'dart:ui' as ui;
+
+import 'package:flutter/rendering.dart';
+import 'package:flutter/widgets.dart';
+import 'package:share_plus/share_plus.dart';
+
+ui.Rect? shareOriginForContext(BuildContext context) {
+  final renderObject = context.findRenderObject();
+  if (renderObject is! RenderBox || !renderObject.hasSize) {
+    return null;
+  }
+  return renderObject.localToGlobal(Offset.zero) & renderObject.size;
+}
+
+Future<Uint8List> captureWidgetPng(
+  GlobalKey key, {
+  double pixelRatio = 3.0,
+}) async {
+  await WidgetsBinding.instance.endOfFrame;
+
+  final context = key.currentContext;
+  if (context == null) {
+    throw StateError('share target is not mounted');
+  }
+
+  final renderObject = context.findRenderObject();
+  if (renderObject is! RenderRepaintBoundary) {
+    throw StateError('share target is not a repaint boundary');
+  }
+
+  final image = await renderObject.toImage(pixelRatio: pixelRatio);
+  final byteData = await image.toByteData(format: ui.ImageByteFormat.png);
+  if (byteData == null) {
+    throw StateError('failed to convert share image');
+  }
+  return byteData.buffer.asUint8List();
+}
+
+Future<void> sharePngFromBoundary(
+  GlobalKey key, {
+  required String fileName,
+  String? text,
+  String? subject,
+  ui.Rect? sharePositionOrigin,
+  double pixelRatio = 3.0,
+}) async {
+  final bytes = await captureWidgetPng(key, pixelRatio: pixelRatio);
+  final xFile = XFile.fromData(bytes, mimeType: 'image/png', name: fileName);
+  await SharePlus.instance.share(
+    ShareParams(
+      files: [xFile],
+      text: text,
+      subject: subject,
+      sharePositionOrigin: sharePositionOrigin,
+    ),
+  );
+}
+
+Future<void> sharePlainText({
+  required String text,
+  String? subject,
+  ui.Rect? sharePositionOrigin,
+}) async {
+  await SharePlus.instance.share(
+    ShareParams(
+      text: text,
+      subject: subject,
+      sharePositionOrigin: sharePositionOrigin,
+    ),
+  );
+}