•	create a flutter module to incorporate an ios project by command :

flutter create -i swift -t module
• flutter module dependencies : webview_flutter : 0.3.1
• dart:
WebView w = WebView(
initialUrl: src,
onWebViewCreated: this.onWebViewCreated,
javascriptMode: jmode,
javascriptChannels: jsChannels,
gestureRecognizers: gestureRecognizers);
• ios project profile : flutter_application_path = ‘my flutter module path here’ eval(File.read(File.join(flutter_application_path, '.ios', 'Flutter', 'podhelper.rb')), binding)
• flutter module .ios/Runner/info.plist add :
io.flutter.embedded_views_preview

• xcode run ios project , when jump to flutter page which use webview from ios page , the page would be nothing

LOG:
2019-05-29 09:49:58.207671+0800 OleApp[59062:1272815] [VERBOSE-2:ui_dart_state.cc(148)] Unhandled Exception: PlatformException(unregistered_view_type, trying to create a view with an unregistered type, unregistered view type: 'plugins.flutter.io/webview')
#0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:564:7)
#1 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:302:33)

#2 PlatformViewsService.initUiKitView (package:flutter/src/services/platform_views.dart:132:41)

#3 _UiKitViewState._createNewUiKitView (package:flutter/src/widgets/platform_view.dart:454:71)

#4 _UiKitViewState._initializeOnce (package:flutter/src/widgets/platform_view.dart:404:5)
#5 _UiKitViewState.didChangeDependencies (package:flutter/src/widgets/platform_view.dart:414:5)
#6 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3862:12)
#7 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#8 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#9 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#10 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#11 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#12 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#13 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11)
#14 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#15 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#16 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#17 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#18 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#19 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#20 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#21 ParentDataElement.mount (package:flutter/src/widgets/framework.dart:4063:11)
#22 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#23 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#24 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#25 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#26 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#27 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11)
#28 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#29 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#30 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4982:32)
#31 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#32 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#33 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#34 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#35 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#36 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#37 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#38 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#39 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#40 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#41 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#42 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#43 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#44 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#45 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#46 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#47 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#48 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#49 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#50 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#51 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#52 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#53 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#54 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#55 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#56 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#57 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#58 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#59 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#60 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#61 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#62 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#63 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#64 ParentDataElement.mount (package:flutter/src/widgets/framework.dart:4063:11)
#65 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#66 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#67 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#68 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#69 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#70 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11)
#71 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#72 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#73 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4982:32)
#74 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#75 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#76 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#77 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#78 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#79 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#80 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#81 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#82 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#83 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#84 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#85 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#86 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#87 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#88 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#89 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#90 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#91 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#92 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#93 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#94 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#95 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#96 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4982:32)
#97 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#98 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#99 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#100 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#101 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#102 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#103 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#104 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#105 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#106 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#107 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#108 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#109 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#110 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#111 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#112 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#113 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#114 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11)
#115 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#116 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#117 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#118 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#119 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#120 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#121 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#122 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#123 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#124 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#125 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#126 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#127 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#128 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#129 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#130 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#131 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#132 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#133 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#134 ParentDataElement.mount (package:flutter/src/widgets/framework.dart:4063:11)
#135 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#136 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4982:32)
#137 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#138 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#139 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#140 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#141 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#142 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11)
#143 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#144 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#145 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#146 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#147 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#148 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#149 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#150 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#151 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#152 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#153 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#154 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#155 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11)
#156 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#157 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#158 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#159 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#160 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#161 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#162 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#163 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#164 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#165 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#166 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#167 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#168 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#169 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#170 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#171 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#172 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#173 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#174 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11)
#175 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#176 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#177 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#178 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#179 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#180 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#181 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11)
#182 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#183 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#184 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#185 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#186 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#187 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#188 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#189 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#190 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#191 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#192 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#193 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#194 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#195 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#196 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#197 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#198 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#199 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#200 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11)
#201 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#202 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#203 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#204 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#205 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#206 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#207 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11)
#208 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#209 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#210 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#211 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#212 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#213 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#214 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#215 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#216 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#217 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#218 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#219 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#220 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#221 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#222 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#223 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#224 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#225 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#226 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11)
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#228 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
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#235 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#236 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#237 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#238 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#239 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11)
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#242 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
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#245 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#246 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
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#248 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
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#251 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#252 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#253 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#254 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#255 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#256 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#257 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4982:32)
#258 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#259 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#260 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#261 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#262 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#263 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11)
#264 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
#265 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#266 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#267 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#268 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#269 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#270 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
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#273 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11)
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#276 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#277 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#278 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#279 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#280 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#281 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
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#308 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#309 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#310 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#311 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#312 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
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#318 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#319 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#320 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
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#331 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3722:5)
#332 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3717:5)
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#334 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
#335 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
#336 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2961:14)
#337 Element.updateChild (package:flutter/src/widgets/framework.dart:2764:12)
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#358 RenderObjectElement.updateChildren (package:flutter/src/widgets/framework.dart:4659:32)
#359 MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4992:17)
#360 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:15)
#361 _TheatreElement.update (package:flutter/src/widgets/overlay.dart:607:16)
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#365 StatefulElement.update (package:flutter/src/widgets/framework.dart:3894:5)
#366 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:15)
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#371 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4883:14)
#372 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:15)
#373 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3750:16)
#374 Element.rebuild (package:flutter/src/widgets/framework.dart:3565:5)
#375 StatefulElement.update (package:flutter/src/widgets/framework.dart:3894:5)
#376 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:15)
#377 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4883:14)
#378 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:15)
#379 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:48<…>

flutter doctor -v
[✓] Flutter (Channel stable, v1.5.4-hotfix.2, on Mac OS X 10.13.6 17G6030, locale zh-Hans-CN)
• Flutter version 1.5.4-hotfix.2 at /Library/flutter
• Framework revision 7a4c334 (4 weeks ago), 2019-04-29 11:05:24 -0700
• Engine revision 52c7a1e
• Dart version 2.3.0 (build 2.3.0-dev.0.5 a1668566e5)

[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
• Android SDK at /Users/ljb/Library/Android/sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-28, build-tools 28.0.3
• Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1248-b01)
• All Android licenses accepted.

[!] iOS toolchain - develop for iOS devices (Xcode 10.1)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 10.1, Build version 10B61
✗ Verify that all connected devices have been paired with this computer in Xcode.
If all devices have been paired, libimobiledevice and ideviceinstaller may require updating.
To update with Brew, run:
brew update
brew uninstall --ignore-dependencies libimobiledevice
brew uninstall --ignore-dependencies usbmuxd
brew install --HEAD usbmuxd
brew unlink usbmuxd
brew link usbmuxd
brew install --HEAD libimobiledevice
brew install ideviceinstaller
• ios-deploy 1.9.4
• CocoaPods version 1.6.1

[✓] Android Studio (version 3.3)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin version 34.0.1
• Dart plugin version 182.5215
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1248-b01)

[✓] IntelliJ IDEA Ultimate Edition (version 2018.2.8)
• IntelliJ at /Applications/IntelliJ IDEA.app
• Flutter plugin version 34.0.1
• Dart plugin version 182.5215

[!] VS Code (version 1.33.1)
• VS Code at /Applications/Visual Studio Code.app/Contents
✗ Flutter extension not installed; install from
https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter

[✓] Connected device (1 available)
• iPhone XR • 166B0A54-BD2C-41CA-8972-6B34BA14490A • ios • iOS 12.1 (simulator)

! Doctor found issues in 2 categories.