小编Adi*_*tya的帖子

我想在 Flutter 中的图像上应用BackdropFilter。因此，我使用以下方式应用Flutter 文档中给出的过滤器。

import 'dart:ui';
import 'package:flutter/material.dart';

void main() {
   runApp(
    MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: MyApp(),
      ),
    ),
  );
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Stack(
          alignment: Alignment.bottomCenter,
          children: <Widget>[
            Container(
              height: 500,
              child: Image.network('https://encrypted-tbn0.gstatic.com/images?q=tbn%3AANd9GcQlXYdeEKhFq34sh8-0ZKC1uqCcVGgOzdW_ZRAqCBkWxG-oeCB1'),
            ),
            Positioned(
              top: 300,
              bottom: 0,
              left: 0,
              right: 0,
              child: ClipRect(
                child: BackdropFilter(
                  filter: ImageFilter.blur(sigmaX: 2, sigmaY: 10),
                  child: Container(
                    color: Colors.black.withOpacity(0),
                  ),
                ),
              ),
            ),
          ] …