`Compiler message: lib/widgets/touchinteractions/dragtarget.dart:73:28: Error: The argument type 'Null Function(double)' can't be assigned to the parameter type 'void Function(Object)'.

• 'Object' is from 'dart:core'. onLeave: (double value) { ^ Target kernel_snapshot failed: Exception: Errors during snapshot creation: null build failed.

FAILURE: Build failed with an exception.

• Where: Script 'D:\Flutter\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 801

• What went wrong: Execution failed for task ':app:compileFlutterBuildDebug'.

Process 'command 'D:\Flutter\flutter\bin\flutter.bat'' finished with non-zero exit value 1

• Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.`

Compiler message: Error: Could not resolve the package 'image' in 'package:image/image.dart'. lib/category/animation/simulation/particle.dart:9:8: Error: Not found: 'package:image/image.dart' import 'package:image/image.dart' as image; ^ lib/category/animation/simulation/particle.dart:92:28: Error: Type 'image.Image' not found. void separatePixels(List<image.Image> blankLayers, image.Image fullImage, int width, int height) { ^^^^^^^^^^^ lib/category/animation/simulation/particle.dart:92:54: Error: Type 'image.Image' not found. void separatePixels(List<image.Image> blankLayers, image.Image fullImage, int width, int height) { ^^^^^^^^^^^ lib/category/animation/simulation/particle.dart:103:10: Error: Type 'image.Image' not found. Future<image.Image> convertWidget2Image() async { ^^^^^^^^^^^ lib/category/animation/simulation/particle.dart:111:30: Error: Type 'image.Image' not found. Widget convertImage2Widget(image.Image png) { ^^^^^^^^^^^ lib/category/animation/simulation/particle.dart:82:11: Error: 'Image' isn't a type. image.Image fullImage = await convertWidget2Image(); ^^^^^ lib/category/animation/simulation/particle.dart:85:16: Error: 'Image' isn't a type. List<image.Image> blankLayers = List.generate(widget.numberOfLayers, (i) => image.Image(width, height)); ^^^^^ lib/category/animation/simulation/particle.dart:85:81: Error: Method not found: 'Image'. List<image.Image> blankLayers = List.generate(widget.numberOfLayers, (i) => image.Image(width, height)); ^^^^^ lib/category/animation/simulation/particle.dart:92:34: Error: 'Image' isn't a type. void separatePixels(List<image.Image> blankLayers, image.Image fullImage, int width, int height) { ^^^^^ lib/category/animation/simulation/particle.dart:92:60: Error: 'Image' isn't a type. void separatePixels(List<image.Image> blankLayers, image.Image fullImage, int width, int height) { ^^^^^ lib/category/animation/simulation/particle.dart:108:12: Error: Method not found: 'decodeImage'. return image.decodeImage(pngBytes); ^^^^^^^^^^^ lib/category/animation/simulation/particle.dart:111:36: Error: 'Image' isn't a type. Widget convertImage2Widget(image.Image png) { ^^^^^ lib/category/animation/simulation/particle.dart:112:41: Error: Method not found: 'encodePng'. Uint8List data = Uint8List.fromList(image.encodePng(png)); ^^^^^^^^^ lib/category/widgets/touchinteractions/dragtarget.dart:86:28: Error: The argument type 'Null Function(double)' can't be assigned to the parameter type 'void Function(Object)'.

• 'Object' is from 'dart:core'. onLeave: (double value) { ^

源文件的名称是下划线区分单词，而跳转markdown显示源代码的时候却是 MaterialPageRoute( builder: (context) => MarkdownPage(codePath + title.toLowerCase() + '.dart'), ) 直接将‘页面标题’转为小写字母，导致很多界面，点击查看源码的时候打开的路径异常而无法获取到正确的源码文件，从而没法实现跳转。

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FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring project ':shared_preferences'.
> Could not resolve all artifacts for configuration ':shared_preferences:classpath'.
   > Could not download kotlin-reflect.jar (org.jetbrains.kotlin:kotlin-reflect:1.3.21)
      > Could not get resource 'https://jcenter.bintray.com/org/jetbrains/kotlin/kotlin-reflect/1.3.21/kotlin-reflect-1.3.21.jar'.
         > Could not GET 'https://d29vzk4ow07wi7.cloudfront.net/a3065c822633191e0a3e3ee12a29bec234fc4b2864a6bb87ef48cce3e9e0c26a?response-content-disposition=attachment%3Bfilename%3D%22kotlin-reflect-1.3.21.jar%22&Policy=eyJTdGF0ZW1lbnQiOiBbeyJSZXNvdXJjZSI6Imh0dHAqOi8vZDI5dnprNG93MDd3aTcuY2xvdWRmcm9udC5uZXQvYTMwNjVjODIyNjMzMTkxZTBhM2UzZWUxMmEyOWJlYzIzNGZjNGIyODY0YTZiYjg3ZWY0OGNjZTNlOWUwYzI2YT9yZXNwb25zZS1jb250ZW50LWRpc3Bvc2l0aW9uPWF0dGFjaG1lbnQlM0JmaWxlbmFtZSUzRCUyMmtvdGxpbi1yZWZsZWN0LTEuMy4yMS5qYXIlMjIiLCJDb25kaXRpb24iOnsiRGF0ZUxlc3NUaGFuIjp7IkFXUzpFcG9jaFRpbWUiOjE1ODIyNjk2Mzh9LCJJcEFkZHJlc3MiOnsiQVdTOlNvdXJjZUlwIjoiMC4wLjAuMC8wIn19fV19&Signature=c-T3jrsJeAtFfbjH7FwfvHRBv6k5hUxL3lFdTJfMPAIUBWs39--HLFfHst1NGYJSA629BLF7LM-RWa3U2kEt3GSsqHQMf47I97XRXR7sUVT9RNc-fTL1SY6gNKBGCSnvvV~5pwbAG6fixZTougP83K7U46ogJu~uU4m5GH2HqNB5qkZo6dB47pTj8MvRrFvX6rX3uxJBKKN0Jz598NKU-euqjQiiAkyGM9RzQ6Y9vJ2EpSbuj4dS1gDJgHEAUMSz3cOaZo9M6o4vqSTOj8EYB-2~eZFnmsLnHrBtTJAmRLOJoTMTJr3W6IYK3H8guscL6TsTIK8LK2Oz8ULwgUxPvw__&Key-Pair-Id=APKAIFKFWOMXM2UMTSFA'.
            > Received close_notify during handshake
> Failed to notify project evaluation listener.
   > Could not get unknown property 'android' for project ':shared_preferences' of type org.gradle.api.Project.
   > Could not find method implementation() for arguments [project ':shared_preferences_macos'] on object of type org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler.
   > Could not find method implementation() for arguments [project ':shared_preferences_web'] on object of type org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler.

1算法增加了广度优先搜索字典树（广度优先搜索是为了结果的顺序），搜索任意位置关键字的方法 2算法增加kmp算法和直接用字符串contain的方法可供以后调整 3优化代码结构，把匹配策略放到search_strategy中，后续可以扩展 4支持keyword字段用空格分隔成多个关键字 5优化ui，搜索框右边增加一个删除已输入字符串的小按钮，搜索结果显示title和subtitle 6输入多关键字时，用来分隔关键字的逗号改成了空格，比较符合一般的搜索习惯

添加了一个搜索页面，入口在主页左上角的FlutterLogo 算法封装在了search_utils里，添加完List类型的字典后可支持模糊搜索和前缀搜索，以及两者的组合，其中模糊搜索可以指定容错率。

目前字典数据仅仅自己做了一点用来测试，而且暂时还没有支持点击跳转，后期可以用map把关键词映射到页面来实现。