加载本地图片步骤

1、在根目录下建立文件夹，也可以建在其它目录下，官方建议命名为images

2.在pubspec.yaml文件中声明本地图片， 每一个使用的本地图片都需要在yaml文件中声明

  # To add assets to your application, add an assets section, like this:
  # assets:
  #  - images/a_dot_burr.jpeg
  #  - images/a_dot_ham.jpeg
 # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.dev/assets-and-images/#resolution-aware.

  # For details regarding adding assets from package dependencies, see
  # https://flutter.dev/assets-and-images/#from-packages

在使用的时候我们可以把官方的注释打开，按照格式申明我们自己的图片路径：

  assets:
    - images/girl.jpeg

然后进行编译的时候，会有以下错误提示：

Error detected in pubspec.yaml:
Error on line 44, column 4: Expected a key while parsing a block mapping.
   ╷
44 │    assets:
   │    ^
   ╵
Please correct the pubspec.yaml file at /Users/CodingSnail/Documents/workspace/FlutterSpace/custom_widget/pubspec.yaml
Process finished with exit code 1

原因是assets前面有一个空格，assets需要与上面的uses-material-design对齐，把它对齐重新编译就好了。

3.在代码中执行加载本地图片，示例：

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
          appBar: AppBar(
            title: Text('加载本地图片示例'),
          ),
          body: Column(
            children: <Widget>[
              Image.asset(
                'images/girl.jpeg',
              ),
            ],
          )),
    );
  }
}

结果展示如下：

WechatIMG1196 (1).png