修改ios

lib/jdsdk.dart

 import 'dart:async';
-
 import 'package:flutter/foundation.dart';
 import 'package:flutter/services.dart';
 
 class Jdsdk {
-  static const MethodChannel _channel =
-      const MethodChannel('jdsdk');
+  static const MethodChannel _channel = const MethodChannel('jdsdk');
 
   static Future<String> get platformVersion async {
     final String version = await _channel.invokeMethod('getPlatformVersion');
@@ -13,14 +11,16 @@ class Jdsdk {
   }
 
   ///初始化sdk
-  static Future<String> init({@required String appKey, @required String appSecret}) async {
-    final String version = await _channel.invokeMethod('init',{"appKey": appKey, "appSecret": appSecret});
+  static Future<String> init(
+      {@required String appKey, @required String appSecret}) async {
+    final String version = await _channel
+        .invokeMethod('init', {"appKey": appKey, "appSecret": appSecret});
     return version;
   }
 
   ///打开京东任意url
   static Future<String> openUrl({@required String url}) async {
-    final String version = await _channel.invokeMethod('openUrl',{"url": url});
+    final String version = await _channel.invokeMethod('openUrl', {"url": url});
     return version;
   }
 }

pubspec.lock

 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
-  archive:
-    dependency: transitive
-    description:
-      name: archive
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "2.0.11"
-  args:
-    dependency: transitive
-    description:
-      name: args
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "1.5.2"
   async:
     dependency: transitive
     description:
       name: async
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.4.0"
+    version: "2.5.0-nullsafety.1"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.0.5"
+    version: "2.1.0-nullsafety.1"
+  characters:
+    dependency: transitive
+    description:
+      name: characters
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.1.0-nullsafety.3"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.1.2"
-  collection:
+    version: "1.2.0-nullsafety.1"
+  clock:
     dependency: transitive
     description:
-      name: collection
+      name: clock
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.14.11"
-  convert:
+    version: "1.1.0-nullsafety.1"
+  collection:
     dependency: transitive
     description:
-      name: convert
+      name: collection
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.1.1"
-  crypto:
+    version: "1.15.0-nullsafety.3"
+  fake_async:
     dependency: transitive
     description:
-      name: crypto
+      name: fake_async
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.1.3"
+    version: "1.2.0-nullsafety.1"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -67,55 +60,27 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
-  image:
-    dependency: transitive
-    description:
-      name: image
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "2.1.4"
   matcher:
     dependency: transitive
     description:
       name: matcher
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "0.12.6"
+    version: "0.12.10-nullsafety.1"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.1.8"
+    version: "1.3.0-nullsafety.3"
   path:
     dependency: transitive
     description:
       name: path
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.6.4"
-  pedantic:
-    dependency: transitive
-    description:
-      name: pedantic
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "1.8.0+1"
-  petitparser:
-    dependency: transitive
-    description:
-      name: petitparser
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "2.4.0"
-  quiver:
-    dependency: transitive
-    description:
-      name: quiver
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "2.0.5"
+    version: "1.8.0-nullsafety.1"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -127,62 +92,55 @@ packages:
       name: source_span
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.5.5"
+    version: "1.8.0-nullsafety.2"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.9.3"
+    version: "1.10.0-nullsafety.1"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.0-nullsafety.1"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.0.5"
+    version: "1.1.0-nullsafety.1"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0-nullsafety.1"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "0.2.11"
+    version: "0.2.19-nullsafety.2"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.1.6"
+    version: "1.3.0-nullsafety.3"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.0.8"
-  xml:
-    dependency: transitive
-    description:
-      name: xml
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "3.5.0"
+    version: "2.1.0-nullsafety.3"
 sdks:
-  dart: ">=2.4.0 <3.0.0"
+  dart: ">=2.10.0-110 <2.11.0"