1.调整分享的图片大小

lib/widgets/share/share_alert_select.dart

@@ -112,7 +112,7 @@ class _ShareAlertSelectState extends State<ShareAlertSelect> {
       RenderRepaintBoundary boundary = buildContext.findRenderObject();
 
       ///pixelRatio是放大倍数
-      ui.Image image = await boundary.toImage(pixelRatio: 5);
+      ui.Image image = await boundary.toImage(pixelRatio: 3);
       // 注意：png是压缩后格式，如果需要图片的原始像素数据，请使用rawRgba
       ByteData byteData = await image.toByteData(format: ui.ImageByteFormat.png);
       Uint8List pngBytes = byteData.buffer.asUint8List();