Flutter 空安全的糖果罐

import 'package:adaptation/adaptation.dart';
 MaterialApp(
  title: 'Flutter Demo',
  theme: ThemeData(
    primarySwatch: Colors.blue,
    visualDensity: VisualDensity.adaptivePlatformDensity,
  ),
  home: MyHomePage(title: 'Flutter Demo Home Page'),
  builder: (context, widget) {
    return Adaptation(
      child: widget,
      designWidth: 375, // 你的设计稿宽度
    );
  },
);

-h, --[no-]help     显示帮助信息
-p, --path          Flutter 项目的根路径
                    (默认 ".")
-f, --folder        assets 文件夹的名字
                    (默认 "assets")
-w, --[no-]watch    是否继续监听 assets 的变化
                    (默认 开启)
-t, --type          pubsepec.yaml 生成配置的类型
                    "d" 代表以文件夹方式生成 "- assets/images/"
                    "f" 代表以文件方式生成   "- assets/images/xxx.jpg"
                    (默认 "d")
-s, --[no-]save     是否保存命令到本地
                    如果执行 "agen" 不带任何命令，将优先使用本地的命令进行执行
-o, --out           const 类放置的位置
                    (默认放置在 "lib" 下面)
-r, --rule          consts 的名字的命名规范
                    "lwu"(小写带下划线) : "assets_images_xxx_jpg"
                    "uwu"(大写带下划线) : "ASSETS_IMAGES_XXX_JPG"
                    "lcc"(小驼峰)      : "assetsImagesXxxJpg"
                    (默认 "lwu")
-c, --class         const 类的名字
                    (默认 "Assets")
    --const-ignore  使用正则表达式忽略一些const(不是全部const都希望生成)

dependencies:
  # 在子模块中引入
  ff_annotation_route_core: any
  # 在根项目引入，包括一些帮助类以及 ff_annotation_route_core
  ff_annotation_route_library: any

@FFArgumentImport('hide TestMode2')
import 'package:example1/src/model/test_model.dart';
@FFArgumentImport()
import 'package:example1/src/model/test_model1.dart' hide TestMode3;
import 'package:ff_annotation_route_library/ff_annotation_route_library.dart';
​
@FFRoute(
  name: 'flutterCandies://testPageE',
  routeName: 'testPageE',
  description: 'Show how to push new page with arguments(class)',
  // argumentImports are still work for some cases which you can't use @FFArgumentImport()
  // argumentImports: <String>[
  //   'import \'package:example1/src/model/test_model.dart\';',
  //   'import \'package:example1/src/model/test_model1.dart\';',
  // ],
  exts: <String, dynamic>{
    'group': 'Complex',
    'order': 1,
  },
)
class TestPageE extends StatelessWidget {
  const TestPageE({
    this.testMode = const TestMode(
      id: 2,
      isTest: false,
    ),
    this.testMode1,
  });
  factory TestPageE.deafult() => TestPageE(
        testMode: TestMode.deafult(),
      );
​
  factory TestPageE.required({@required TestMode testMode}) => TestPageE(
        testMode: testMode,
      );
​
  final TestMode testMode;
  final TestMode1 testMode1;
}

-h, --[no-]help                   帮助信息。
​
-p, --path                        执行命令的目录，默认当前目录。
​
-o, --output                      route 和 helper 文件的输出目录路径，路径相对于主项目的 lib 文件夹。
​
-n, --name                        路由常量类的名称，默认为 `Routes`。
​
-g, --git                         扫描 git 引用的 package，你需要指定 package 的名字，多个用 `,` 分开
    --routes-file-output          routes 文件的输出目录路径，路径相对于主项目的lib文件夹
    --const-ignore                使用正则表达式忽略一些const(不是全部const都希望生成)
    --[no-]route-constants        是否在根项目中的 `xxx_route.dart` 生成全部路由的静态常量
    --[no-]package                这个是否是一个 package
    --[no-]supper-arguments       是否生成路由参数帮助类
​
-s, --[no-]save                   是否保存命令到本地。如果保存了，下一次就只需要执行 `ff_route` 就可以了。
    --[no-]null-safety            是否支持空安全，默认 `true`

import 'package:ff_annotation_route_library/ff_annotation_route_library.dart';
import 'package:flutter/material.dart';
import 'example_route.dart';
import 'example_routes.dart';
​
void main() => runApp(MyApp());
​
class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'ff_annotation_route demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      initialRoute: Routes.fluttercandiesMainpage,
      onGenerateRoute: (RouteSettings settings) {
        return onGenerateRoute(
          settings: settings,
          getRouteSettings: getRouteSettings,
          routeSettingsWrapper: (FFRouteSettings ffRouteSettings) {
            if (ffRouteSettings.name == Routes.fluttercandiesMainpage ||
                ffRouteSettings.name ==
                    Routes.fluttercandiesDemogrouppage.name) {
              return ffRouteSettings;
            }
            return ffRouteSettings.copyWith(
                widget: CommonWidget(
              child: ffRouteSettings.widget,
              title: ffRouteSettings.routeName,
            ));
          },
        );
      },
    );
  }
}

  Navigator.pushNamed(
    context,
    Routes.flutterCandiesTestPageE.name,
    arguments: Routes.flutterCandiesTestPageE.requiredC(
      testMode: const TestMode(
        id: 100,
        isTest: true,
      ),
    ),
  );

environment:
  sdk: '>=2.12.0 <3.0.0'

  // List interface.
  void add(E element) {
    // This implementation only works for lists which allow `null` 
    // as element.
    this[this.length++] = element;
  }

  void set length(int new_length) {
    if (new_length > length) {
      // Verify that element type is nullable.
      // 官方在这里做了判断 
      null as T;
      if (new_length > _capacity) {
        _grow(new_length);
      }
      _setLength(new_length);
      return;
    }
    final int new_capacity = new_length;

  void _grow(int new_capacity) {
    // 创建了一个长度为 new_capacity 的数组，并且用 null 填充
    var newData = _allocateData(new_capacity);
    // This is a work-around for dartbug.com/30090: array-bound-check
    // generalization causes excessive deoptimizations because it
    // hoists CheckArrayBound(i, ...) out of the loop below and turns it
    // into CheckArrayBound(length - 1, ...). Which deoptimizes
    // if length == 0. However the loop itself does not execute
    // if length == 0.
    // 从旧列表中复制数据
    if (length > 0) {
      for (int i = 0; i < length; i++) {
        newData[i] = this[i];
      }
    }
    // 通知引擎替换新数据
    _setData(newData);
  }

  static _List _allocateData(int capacity) {
    if (capacity == 0) {
      // Use shared empty list as backing.
      return _emptyList;
    }
    // Round up size to the next odd number, since this is free
    // because of alignment requirements of the GC.
    // (dart:core-patch/array.dart.dart:13)
    return new _List(capacity | 1);
  }

 @pragma("vm:recognized", "graph-intrinsic")
  void _setData(_List array) native "GrowableList_setData";

  @pragma("vm:recognized", "graph-intrinsic")
  void _setLength(int new_length) native "GrowableList_setLength";