我的应用背景设置如下:

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      home: new Container(
        decoration: new BoxDecoration(
          image: new DecorationImage(
            image: new ExactAssetImage('assets/lol/aatrox.jpg'),
            fit: BoxFit.cover,
          ),
        ),
        child: new BackdropFilter(filter: new ImageFilter.blur(sigmaX: 600.0, sigmaY: 1000.0)),
        width: 400.0,
      ),
    );
  }
}

我想模糊 DecorationImage，所以我在 Container 中添加了一个 BackdropFilter，但我没有看到任何变化。我做错了什么？

最佳答案

您可以通过模糊容器子代来执行类似的操作。

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      home: new Container(
        decoration: new BoxDecoration(
          image: new DecorationImage(
            image: new ExactAssetImage('assets/dog.png'),
            fit: BoxFit.cover,
          ),
        ),
        child: new BackdropFilter(
          filter: new ImageFilter.blur(sigmaX: 10.0, sigmaY: 10.0),
          child: new Container(
            decoration: new BoxDecoration(color: Colors.white.withOpacity(0.0)),
          ),
        ),
      ),
    );
  }
}

https://stackoverflow.com/questions/49055676/