功能完善

admin

2021-11-25 70a344485bd0c9b68ac91f72ed23ec5bfa998b09

 lib/ui/widget/capture.dart

@@ -1,35 +1,52 @@
import 'dart:io';
import 'dart:typed_data';
import 'dart:ui';

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:path_provider/path_provider.dart';


///对widget截图


class CaptureWidget extends StatelessWidget {
//截图组件
  GlobalKey rootWidgetKey = GlobalKey();
  final Widget widget;
  final CaptureController captureController;

  CaptureWidget(this.widget);
  CaptureWidget({required this.widget, required this.captureController}) {
    captureController.setGlobalKey(rootWidgetKey);
  }

  @override
  Widget build(BuildContext context) {
    return RepaintBoundary(key: rootWidgetKey, child: widget);
  }

  Future<Uint8List?> capturePng() async {
}

class CaptureController {

  GlobalKey? _globalKey;

  setGlobalKey(GlobalKey globalKey) {
    _globalKey = globalKey;
  }



  Future<File?> capturePng(String path) async {
    try {
      RenderRepaintBoundary? boundary = rootWidgetKey.currentContext!
      RenderRepaintBoundary? boundary = _globalKey!.currentContext!
          .findRenderObject() as RenderRepaintBoundary;
      var image = await boundary.toImage(pixelRatio: 3.0);
      ByteData? byteData = await image.toByteData(format: ImageByteFormat.png);
      Uint8List pngBytes = byteData!.buffer.asUint8List();
      return pngBytes;
      File(path).writeAsBytesSync(pngBytes);
      return File(path);
    } catch (e) {}
    return null;
  }

}