Question

尝试在gridview.count小部件内添加图像时。图像未加载，并且在控制台中出现错误。

图像放置在本地-资产文件夹

body: center(
  child:gridview.count(
  crossaxiscount: 3,
  childaspectratio: 1.0,
  padding: const edgeinsets.all(4.0),
  mainaxisspacing: 4.0,
  crossaxisspacing: 4.0,
  children: <string>[
    'spinach_onion_salad.png',
    'veggie.png',
  ].map<widget>((string url) {
    return gridtile(
      footer: gridtilebar(
        title: text(url)
      ),
      child: image.network(url, fit: boxfit.cover)
    );
  }).tolist(),
   ),
 ),

错误：

Error:: 
Reloaded 0 of 426 libraries in 937ms.
Reloaded 6 of 426 libraries in 1,338ms.
I/flutter (32327): ══╡ EXCEPTION CAUGHT BY IMAGE RESOURCE SERVICE ╞════════════════════════════════════════════════════
I/flutter (32327): The following ArgumentError was thrown resolving an image codec:

I/flutter (32327): Invalid argument(s): No host specified in URI file:///%20eggie.png
I/flutter (32327):
I/flutter (32327): When the exception was thrown, this was the stack:
I/flutter (32327): #0      _HttpClient._openUrl (dart:_http/http_impl.dart:2121:9)
I/flutter (32327): #1      _HttpClient.getUrl (dart:_http/http_impl.dart:2056:48)\

Answer 1

 return Container(
      child: Center(
        child: GridView.count(
          crossAxisCount: 3,
          childAspectRatio: 1.0,
          padding: const EdgeInsets.all(4.0),
          mainAxisSpacing: 4.0,
          children: <String>[
            'spinach_onion_salad.png',
            'veggie.png',
          ]
              .map<Widget>((String url) => GridTile(
                  footer: GridTileBar(title: Text(url)),
                  child: Image.asset(url)))
              .toList(),
        ),
      ),
    );

Flutter ::无效的参数：URI文件：//图像名称中未指定主机

1 个答案: