这是生产中的应用程序。我已经更改了一些尝试获取dateTime的逻辑，将其本地化将其更改为另一个国家，然后突然出现了一些错误，说明了有关dart html的一些信息，但是我不记得确切的内容，所以我尝试重建项目，抱怨使用新的构建系统，到目前为止，我尝试过：
这些论文都没有做。
更改为旧版时，有13个错误，其中一个抱怨dart：html未找到，因此我将其添加到依赖项和dev dev依赖项中，但仍然没有。 我还评论了intl程序包，因为发生这种情况时我正在使用它，并且程序包没有得到任何结果。
有什么想法如何处理吗？
以下是完整控制台Xcode的输出：
> 2020-03-16 17:55:17.549 xcodebuild[56626:765857] DTDeviceKit: deviceType from 3ad4f96e876e8222a72563420303530067367818 was NULL
> ** BUILD FAILED **
>
>
> Xcode's output: ↳
**Skipped Warnings about deprecated methods, because of char limits and previously builds despite the warnings.**
>
> Compiler message:
> ../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/intl-0.16.0/lib/src/http_request_data_reader.dart:11:8:
> Error: Not found: 'dart:html'
> import 'dart:html';
> ^
> ../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+4/lib/src/browser_client.dart:6:8:
> Error: Not found: 'dart:html'
> import 'dart:html';
> ^
> ../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/intl-0.16.0/lib/src/http_request_data_reader.dart:28:10:
> Error: Type 'HttpRequest' not found.
> Future<HttpRequest> _getString(String url, HttpRequest xhr) {
> ^^^^^^^^^^^
> ../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/intl-0.16.0/lib/src/http_request_data_reader.dart:28:46:
> Error: Type 'HttpRequest' not found.
> Future<HttpRequest> _getString(String url, HttpRequest xhr) {
> ^^^^^^^^^^^
> ../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+4/lib/src/browser_client.dart:34:18:
> Error: 'HttpRequest' isn't a type.
> final _xhrs = <HttpRequest>{};
> ^^^^^^^^^^^
> ../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/intl-0.16.0/lib/src/http_request_data_reader.dart:20:23:
> Error: Method not found: 'HttpRequest'.
> var request = new HttpRequest();
> ^^^^^^^^^^^
> ../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/intl-0.16.0/lib/src/http_request_data_reader.dart:28:46:
> Error: 'HttpRequest' isn't a type.
> Future<HttpRequest> _getString(String url, HttpRequest xhr) {
> ^^^^^^^^^^^
> ../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/intl-0.16.0/lib/src/http_request_data_reader.dart:29:35:
> Error: 'HttpRequest' isn't a type.
> var completer = new Completer<HttpRequest>();
> ^^^^^^^^^^^
> ../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+4/lib/src/browser_client.dart:58:34:
> Error: 'Blob' isn't a type.
> var blob = xhr.response as Blob ?? Blob([]);
> ^^^^
> ../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+4/lib/src/browser_client.dart:46:15:
> Error: The method 'HttpRequest' isn't defined for the class
> 'BrowserClient'.
> - 'BrowserClient' is from 'package:http/src/browser_client.dart' ('../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+4/lib/src/browser_client.dart').
> Try correcting the name to the name of an existing method, or defining a method named 'HttpRequest'.
> var xhr = HttpRequest();
> ^^^^^^^^^^^
> ../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+4/lib/src/browser_client.dart:58:42:
> Error: The method 'Blob' isn't defined for the class 'BrowserClient'.
> - 'BrowserClient' is from 'package:http/src/browser_client.dart' ('../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+4/lib/src/browser_client.dart').
> Try correcting the name to the name of an existing method, or defining a method named 'Blob'.
> var blob = xhr.response as Blob ?? Blob([]);
> ^^^^
> ../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+4/lib/src/browser_client.dart:59:20:
> Error: The method 'FileReader' isn't defined for the class
> 'BrowserClient'.
> - 'BrowserClient' is from 'package:http/src/browser_client.dart' ('../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+4/lib/src/browser_client.dart').
> Try correcting the name to the name of an existing method, or defining a method named 'FileReader'.
> var reader = FileReader();
> ^^^^^^^^^^
> Unhandled exception:
> FileSystemException(uri=org-dartlang-untranslatable-uri:dart%3Ahtml;
> message=StandardFileSystem only supports file:* and data:* URIs)
> #0 StandardFileSystem.entityForUri (package:front_end/src/api_prototype/standard_file_system.dart:33:7)
> #1 asFileUri (package:vm/kernel_front_end.dart:604:37)
> #2 writeDepfile (package:vm/kernel_front_end.dart:799:21)
> <asynchronous suspension>
> #3 FrontendCompiler.compile (package:frontend_server/frontend_server.dart:472:15)
> <asynchronous suspension>
> #4 _FlutterFrontendCompiler.compile (package:flutter_frontend_server/server.dart:38:22)
> #5 starter (package:flutter_frontend_server/server.dart:149:27)
> #6 main (file:///b/s/w/ir/cache/builder/src/flutter/flutter_frontend_server/bin/starter.dart:8:30)
> #7 _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:305:32)
> #8 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:174:12)
>
> Target kernel_snapshot failed: Exception: Errors during snapshot creation: null
> Failed to build bundle.
> Failed to package /Users/[user]/StudioProjects/[projectName]/ios/...
> Command PhaseScriptExecution failed with a nonzero exit code
> note: Using new build system
> note: Planning build
> note: Constructing build description
>
> Could not build the precompiled application for the device.
>
> Error launching application on [user].
编辑：我在Podfile中也有“ platform：ios，'11 .0'”，并且在Pods设置中将iOS部署目标设置为11.0。
编辑2：这是我使用的软件包：
依赖性：颤动：sdk：颤动
flutter_localizations：sdk：颤振
flutter_cupertino_localizations：^ 1.0.1
geoflutterfire：^ 2.0.3 + 5
firebase_storage：^ 3.0.6
cloud_firestore：^ 0.12.9 + 6
firebase_core：^ 0.4.0 + 9
firebase_auth：^ 0.14.0 + 5
firebase_messaging：^ 6.0.9
firebase_database：^ 3.0.7
firebase_admob：^ 0.9.0 + 7
flutter_facebook_login：^ 3.0.0
font_awesome_flutter：^ 8.5.0
image_picker：^ 0.6.1 + 11
图片：^ 2.1.4
rxdart：^ 0.22.1
位置：^ 2.3.5
google_maps_flutter：^ 0.5.20 + 1
地理编码器：^ 0.2.1
google_sign_in：^ 4.0.11
提供者：^ 4.0.4
flutter_inapp_purchase：^ 2.0.4
http：^ 0.12.0 + 4
url_launcher：^ 5.2.5
intl：^ 0.16.0
cloud_functions：^ 0.4.1 + 4
apple_sign_in：^ 0.1.0
flutter_signin_button：^ 1.0.0
json_annotation：^ 3.0.1
notification_permissions：^ 0.4.4
html_unescape：^ 1.0.1 + 3
cupertino_icons：^ 0.1.2
dev_dependencies： flutter_test：sdk：flutter build_runner：^ 1.7.3 json_serializable： ^ 3.2.5
答案 0 :(得分：2)
intl软件包需要正确配置才能在Flutter上运行。
导入时，请不要使用import 'package:intl/intl_browser.dart';，而要使用以下内容（每个人都有其用途，因此请参阅文档，最适合您的文档）：
import 'package:intl/date_symbol_data_local.dart';
import 'package:intl/intl.dart';
import 'package:intl/intl_standalone.dart';