在这个示例中,enumToInt函数接受一个Weekday枚举值作为参数,并返回该枚举值在定义中的索引(整数)。在main函数中,我们测试了这个转换函数,确保它按预期工作。 希望这能帮助你理解如何在Flutter中将枚举转换为整数!如果有任何问题,请随时问我。
AI代码解释 import'package:flutter/services.dart';///吐司类型 [LENGTH_SHORT]短时间,[LENGTH_LONG]长时间enumToast{LENGTH_SHORT,LENGTH_LONG}///吐司类classIaToast{staticconstMethodChannel _channel=//方法渠道名constMethodChannel('www.toly1994.com.flutter_journey.toast');staticshow(//静态方法显示吐司{Str...
AI代码解释 enumOperationType{none,dragHead,dragTail,dragZone}classRangeDataextendsChangeNotifier{double start;double end;double minGap;OperationType operationType=OperationType.none;RangeData({this.start=0,this.end=1,this.minGap=0.1});//暂略相关方法...} 在组件构建中,通过LayoutBuilder获取组件的约束信息,...
enum Animal { const Animal({required this.name, required this.weight}); final String name; final int weight; } 创建枚举类型dog和catdog(name: 'dog', weight: 20), cat(name: 'cat', weight: 6); 通过name和weight获取枚举类型factory Animal.fromName(String name) { return Animal.values.first...
1.变量:和Swift类似用 var、dynamic、object 定义变量,也可以直接用类型(String,int,)定义; var str = 'hello'; String str1 = 'world' dynamic d = 10 // 动态任意类型 编译阶段不检查; Object也是动态类型,在编译阶段检查类型; 2.常量:用const和final定义。 const:编译时常量,final在第一次使用时被初始...
enum Actions { Increment } // The reducer, which takes the previous count and increments it in response // to an Increment action. int counterReducer(int state, dynamic action) { return action == Actions.Increment ? state + 1 : state; ...
import 'package:flutter/material.dart'; import 'package:flutter_redux/flutter_redux.dart'; import 'package:redux/redux.dart'; // One simple action: Increment enum Actions { Increment } // The reducer, which takes the previous count and increments it in response // to an Increment action. ...
import'package:flutter/material.dart';import'package:flutter_redux/flutter_redux.dart';import'package:redux/redux.dart';// One simple action: IncrementenumActions { Increment }// The reducer, which takes the previous count and increments it in response// to an Increment action.intcounterReducer(...
Flutter / Dart将Int转换为Enum在Dart 2.17中，您可以使用带值的增强枚举（它可能与索引具有不同的值...
(EnumProperty<ShimmerDirection>('direction', direction)); properties.add( DiagnosticsProperty<Duration>('period', period, defaultValue: null)); properties .add(DiagnosticsProperty<bool>('enabled', enabled, defaultValue: null)); properties.add(DiagnosticsProperty<int>('loop', loop, defaultValue: 0));...