flutter TextField 弹出复制是英文的问题，已实现

1.插件

 flutter_localizations:
    sdk: flutter

3.main.dart

import 'package:flutter_localizations/flutter_localizations.dart';

import 'config/CupertinoLocalizationsDelegate.dart'; // 引入ios需要的创建的文件

MaterialApp(

localizationsDelegates: <LocalizationsDelegate<dynamic>>[
  ChineseCupertinoLocalizations.delegate, // 中文
  DefaultCupertinoLocalizations.delegate, // 英文
  // 下面两个是Material widgets的delegate, 包含中文
  GlobalMaterialLocalizations.delegate,
  GlobalWidgetsLocalizations.delegate,
],
supportedLocales: [ // 识别本地环境的语言
  const Locale('en', 'US'), // English
  const Locale('zh', 'Hans'), // China
  const Locale('zh', ''), // China
  // ... other locales the app supports
],


);

但是

Flutter Textfield长按报错修复:NosuchMethodError: The getter 'pasterButtonLabel' was called on null.

1.创建文件CupertinoLocalizationsDelegate.dart

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

class ChineseCupertinoLocalizations implements CupertinoLocalizations {
  final materialDelegate = GlobalMaterialLocalizations.delegate;
  final widgetsDelegate = GlobalWidgetsLocalizations.delegate;
  final local = const Locale('zh');

  MaterialLocalizations ml;

  Future init() async {
    ml = await materialDelegate.load(local);
    print(ml.pasteButtonLabel);
  }

  @override
  String get alertDialogLabel => ml.alertDialogLabel;

  @override
  String get anteMeridiemAbbreviation => ml.anteMeridiemAbbreviation;

  @override
  String get copyButtonLabel => ml.copyButtonLabel;

  @override
  String get cutButtonLabel => ml.cutButtonLabel;

  @override
  DatePickerDateOrder get datePickerDateOrder => DatePickerDateOrder.mdy;

  @override
  DatePickerDateTimeOrder get datePickerDateTimeOrder =>
      DatePickerDateTimeOrder.date_time_dayPeriod;

  @override
  String datePickerDayOfMonth(int dayIndex) {
    return dayIndex.toString();
  }

  @override
  String datePickerHour(int hour) {
    return hour.toString().padLeft(2, "0");
  }

  @override
  String datePickerHourSemanticsLabel(int hour) {
    return "$hour" + "时";
  }

  @override
  String datePickerMediumDate(DateTime date) {
    return ml.formatMediumDate(date);
  }

  @override
  String datePickerMinute(int minute) {
    return minute.toString().padLeft(2, '0');
  }

  @override
  String datePickerMinuteSemanticsLabel(int minute) {
    return "$minute" + "分";
  }

  @override
  String datePickerMonth(int monthIndex) {
    return "$monthIndex";
  }

  @override
  String datePickerYear(int yearIndex) {
    return yearIndex.toString();
  }

  @override
  String get pasteButtonLabel => ml.pasteButtonLabel;

  @override
  String get postMeridiemAbbreviation => ml.postMeridiemAbbreviation;

  @override
  String get selectAllButtonLabel => ml.selectAllButtonLabel;

  @override
  String timerPickerHour(int hour) {
    return hour.toString().padLeft(2, "0");
  }

  @override
  String timerPickerHourLabel(int hour) {
    return "$hour".toString().padLeft(2, "0") + "时";
  }

  @override
  String timerPickerMinute(int minute) {
    return minute.toString().padLeft(2, "0");
  }

  @override
  String timerPickerMinuteLabel(int minute) {
    return minute.toString().padLeft(2, "0") + "分";
  }

  @override
  String timerPickerSecond(int second) {
    return second.toString().padLeft(2, "0");
  }

  @override
  String timerPickerSecondLabel(int second) {
    return second.toString().padLeft(2, "0") + "秒";
  }

  static const LocalizationsDelegate<CupertinoLocalizations> delegate =
  _ChineseDelegate();

  static Future<CupertinoLocalizations> load(Locale locale) async {
    var localizaltions = ChineseCupertinoLocalizations();
    await localizaltions.init();
    return SynchronousFuture<CupertinoLocalizations>(localizaltions);
  }

  @override
  // TODO: implement modalBarrierDismissLabel
  String get modalBarrierDismissLabel => throw UnimplementedError();

  @override
  String tabSemanticsLabel({int tabIndex, int tabCount}) {
    // TODO: implement tabSemanticsLabel
    throw UnimplementedError();
  }

  @override
  // TODO: implement todayLabel
  String get todayLabel => throw UnimplementedError();
}

class _ChineseDelegate extends LocalizationsDelegate<CupertinoLocalizations> {
  const _ChineseDelegate();

  @override
  bool isSupported(Locale locale) {
    return locale.languageCode == 'zh';
  }

  @override
  Future<CupertinoLocalizations> load(Locale locale) {
    return ChineseCupertinoLocalizations.load(locale);
  }

  @override
  bool shouldReload(LocalizationsDelegate<CupertinoLocalizations> old) {
    return false;
  }
}

但是textinput的光标需要做以下修改，需要将onChange改成onSubmit就可以了

TextField(
//                textInputAction: TextInputAction.go,
//                textAlign: TextAlign.center,
                controller: new TextEditingController(text: kvs[index]['title']),

                onSubmitted: (val) { // 原先是onChange
                  setState((){
                    kvs[index]['title'] = val;
                  });
                },
//                style: TextStyle(textBaseline: TextBaseline.alphabetic),
                decoration: InputDecoration(

                    hintText: "参数名",
                    border: InputBorder.none
                ),
              ),