无法在 Flutter 中加载图像

Question

我是 Flutter 新手。当我尝试加载资产时，我遇到了一个问题。

我检查了 pubspec.yaml 文件以进行识别，但没有发现任何问题。

我检查了给定的路径。

我也尝试了其他图片，甚至扩展名(.png,.jpg)

这是例外情况：

The following assertion was thrown resolving an image codec:
Unable to load asset: assets/images/pink_flower.jpg

When the exception was thrown, this was the stack: 
#0      PlatformAssetBundle.load (package:flutter/src/services/asset_bundle.dart:225:7)
<asynchronous suspension>
#1      AssetBundleImageProvider._loadAsync (package:flutter/src/painting/image_provider.dart:668:31)
#2      AssetBundleImageProvider.load (package:flutter/src/painting/image_provider.dart:651:14)
#3      ImageProvider.resolveStreamForKey.<anonymous closure> 
(package:flutter/src/painting/image_provider.dart:504:13)
...

这是.yaml文件

name: flutterproject
description: VFL Lisesi uygulaması flutter ile.

publish_to: 'none'

version: 1.0.0+1

environment:
sdk: ">=2.7.0 <3.0.0"

dependencies:
flutter:
    sdk: flutter
cupertino_icons: ^1.0.0

dev_dependencies:
flutter_test:
    sdk: flutter
    
flutter:

uses-material-design: true

assets:
    - assets/images/flower2.png
    - assets/images/pink_flower.jpg

fonts:
    - family: Montserrat
    fonts:
        - asset: assets/fonts/montserrat_black.ttf
        weight: 300
        - asset: fonts/montserrat_black_italic.ttf
        weight: 300
        - asset: fonts/montserrat_bold.ttf
        weight: 600
    - family: Trajan Pro
    fonts:
        - asset: fonts/TrajanPro.ttf
        - asset: fonts/TrajanPro_Bold.ttf
        weight: 700

ImageWidget

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

class ImageBanner extends StatelessWidget {

final String _path;

ImageBanner(this._path);

@override
Widget build(BuildContext context) {
    // TODO: implement build
    return Container(
    constraints: BoxConstraints.expand(
        height: 300.0,
    ),
    child: Image.asset(
        _path,
        fit: BoxFit.cover,
    ),
    );
}

}

调用ImageWidget

ImageWidget('assets/images/pink_flower.jpg')

感谢您的帮助！

Answer 1

每当您对 pubspec.yaml 文件进行更改时，请务必在之后执行这两个步骤。

运行 flutter pub get.
停止正在进行的会话并完全重新启动。

Answer 2

请确保您的缩进是这样的：

Answer 3

缩进错误

修复：

assets:
  - assets/images/flower2.png
  - assets/images/pink_flower.jpg

无法在 Flutter 中加载图像

Unable To Load Image in Flutter

image

flutter

dart

assets

flutter-dependencies