断言失败:url！= null不正确

本文介绍了断言失败:url！= null不正确的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

════════小部件库捕获到异常═══════════════════════════════════在构建HomePage(dirty，state:_HomePageState#493d9)时引发了以下断言:断言失败:F:\…\ painting_network_image_web.dart:23url！= null是不正确的

════════ Exception caught by widgets library ═══════════════════════════════════ The following assertion was thrown building HomePage(dirty, state: _HomePageState#493d9): Assertion failed: F:\…\painting_network_image_web.dart:23 url != null is not true

这是我在home.dart中添加此代码时遇到的错误

This is the error I get when I add this codes in home.dart

WallpaperModel wallpaperModel = WallpaperModel(); wallpaperModel = WallpaperModel.fromMap(element); wallpapers.add(wallpaperModel);

/widget/widget.dart

also /widget/widget.dart

Widget wallpapersList({List<WallpaperModel> wallpapers, context}) { return Container( padding: EdgeInsets.symmetric(horizontal: 15.0), child: GridView.count( shrinkWrap: true, physics: ClampingScrollPhysics(), crossAxisCount: 2, childAspectRatio: 1.0, mainAxisSpacing: 5.0, crossAxisSpacing: 5.0, children: wallpapers.map((wallpaper) { return GridTile( child: Container( child: Imagework(wallpaper.src.portrait), ), ); }).toList(), ), ); }

这是我执行代码时遇到的错误我尝试使用 flutter清理，然后再运行 flutter run -v

this is the error I get when I execute my code I tried to use flutter clean also then run flutter run -v

推荐答案

看到代码后，请更改

return SrcModel( orignal: jsonData["orignal"], small: jsonData["small"], portrait: jsonData["protrait"], );

到

return SrcModel( orignal: jsonData["original"], small: jsonData["small"], portrait: jsonData["portrait"], );

现在我看到了你的照片，我喜欢你的设计

now I see your pics and I like your design