请查看此视频。
在这里，我扩展 TextEditingController 以突出显示（也可点击）关键字“ali”。每当用户键入“ali”时，它都可以正常工作。但是在将文本初始化到控制器时，它显示了很多错误。有人请帮助我解决此错误。
注意：当我初始化文本并从“textspan”中删除“recognizer”时，它运行良好，没有显示任何错误。我猜这个问题是由于文本跨度中的“识别器”而发生的。
这是我的代码，请取消注释第 15 行以查看错误。
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:kyubook/utils/utility.dart';
class TexspanTap extends StatefulWidget {
@override
_TexspanTapState createState() => _TexspanTapState();
}
class _TexspanTapState extends State<TexspanTap> {
final MyTextEditingcontroller _editingcontroller = MyTextEditingcontroller();
@override
void initState() {
//_editingcontroller.text = "dghali";
super.initState();
}
@override
void dispose() {
_editingcontroller.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: SafeArea(
child: Column(
children: [
TextField(
controller: _editingcontroller,
),
],
),
),
);
}
}
class MyTextEditingcontroller extends TextEditingController {
@override
TextSpan buildTextSpan(
{required BuildContext context,
TextStyle? style,
required bool withComposing}) {
if (text.toLowerCase().contains("ali")) {
final List<InlineSpan> spans = [];
final int indexOfAli = text.indexOf("ali");
spans.add(TextSpan(text: text.substring(0, indexOfAli)));
spans.add(
TextSpan(
text: text.substring(indexOfAli, indexOfAli + 3),
style: const TextStyle(color: Colors.red),
recognizer: TapGestureRecognizer()
..onTapDown = (final details) {
commonToast("Touched");
}),
);
spans.add(TextSpan(text: text.substring(indexOfAli + 3, text.length)));
return TextSpan(children: spans, style: style);
}
return TextSpan(text: text, style: style);
}
}
日志
I/flutter (26328): ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
I/flutter (26328): The following assertion was thrown building
I/flutter (26328): RawGestureDetector-[LabeledGlobalKey<RawGestureDetectorState>#87b14](state:
I/flutter (26328): RawGestureDetectorState#ede1a(gestures: <none>, excludeFromSemantics: true, behavior: opaque)):
I/flutter (26328): 'package:flutter/src/rendering/editable.dart': Failed assertion: line 2376 pos 14: 'readOnly &&
I/flutter (26328): !obscureText': is not true.
I/flutter (26328):
I/flutter (26328): Either the assertion indicates an error in the framework itself, or we should provide substantially
I/flutter (26328): more information in this error message to help you determine and fix the underlying cause.
I/flutter (26328): In either case, please report this assertion by filing a bug on GitHub:
I/flutter (26328): https://github.com/flutter/flutter/issues/new?template=2_bug.md
I/flutter (26328):
I/flutter (26328): The relevant error-causing widget was:
I/flutter (26328): TextField
I/flutter (26328): file:///Users/ali/Documents/Flutter/Xcelpros/kb_main_clientside/lib/components/profanity_checker/screen/textspan_tap.dart:32:13
I/flutter (26328):
I/flutter (26328): When the exception was thrown, this was the stack:
I/flutter (26328): #2 RenderEditable.describeSemanticsConfiguration (package:flutter/src/rendering/editable.dart:2376:14)
I/flutter (26328): #3 RenderObject._semanticsConfiguration (package:flutter/src/rendering/object.dart:2525:7)
I/flutter (26328): #4 RenderObject.attach (package:flutter/src/rendering/object.dart:1416:34)
I/flutter (26328): #5 RelayoutWhenSystemFontsChangeMixin.attach (package:flutter/src/rendering/object.dart:3401:11)
I/flutter (26328): #6 RenderEditable.attach (package:flutter/src/rendering/editable.dart:2612:11)
I/flutter (26328): #7 AbstractNode.adoptChild (package:flutter/src/foundation/node.dart:138:13)
I/flutter (26328): #8 RenderObject.adoptChild (package:flutter/src/rendering/object.dart:1274:11)
I/flutter (26328): #9 RenderObjectWithChildMixin.child= (package:flutter/src/rendering/object.dart:3022:7)
I/flutter (26328): #10 SingleChildRenderObjectElement.insertRenderObjectChild (package:flutter/src/widgets/framework.dart:6098:18)
I/flutter (26328): #11 RenderObjectElement.attachRenderObject (package:flutter/src/widgets/framework.dart:5758:35)
I/flutter (26328): #12 RenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5440:5)
I/flutter (26328): ... Normal element mounting (92 frames)
I/flutter (26328): #104 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3611:14)
I/flutter (26328): #105 Element.updateChild (package:flutter/src/widgets/framework.dart:3363:18)
I/flutter (26328): #106 _DecorationElement._mountChild (package:flutter/src/material/input_decorator.dart:1591:31)
I/flutter (26328): #107 _DecorationElement.mount (package:flutter/src/material/input_decorator.dart:1604:5)
I/flutter (26328): ... Normal element mounting (69 frames)
I/flutter (26328): #176 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3611:14)
I/flutter (26328): #177 MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6221:36)
I/flutter (26328): #178 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6232:32)
I/flutter (26328): ... Normal element mounting (34 frames)
I/flutter (26328): #212 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3611:14)
I/flutter (26328): #213 MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6221:36)
I/flutter (26328): #214 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6232:32)
I/flutter (26328): ... Normal element mounting (238 frames)
I/flutter (26328): #452 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3611:14)
I/flutter (26328): #453 MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6221:36)
I/flutter (26328): #454 Element.updateChild (package:flutter/src/widgets/framework.dart:3363:18)
I/flutter (26328): #455 RenderObjectElement.updateChildren (package:flutter/src/widgets/framework.dart:5654:32)
I/flutter (26328): #456 MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6243:17)
I/flutter (26328): #457 Element.updateChild (package:flutter/src/widgets/framework.dart:3350:15)
I/flutter (26328): #458 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4599:16)
I/flutter (26328): #459 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4746:11)
I/flutter (26328): #460 Element.rebuild (package:flutter/src/widgets/framework.dart:4267:5)
I/flutter (26328): #461 StatefulElement.update (package:flutter/src/widgets/framework.dart:4778:5)
I/flutter (26328): #462 Element.updateChild (package:flutter/src/widgets/framework.dart:3350:15)
I/flutter (26328): #463 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4599:16)
I/flutter (26328): #464 Element.rebuild (package:flutter/src/widgets/framework.dart:4267:5)
I/flutter (26328): #465 ProxyElement.update (package:flutter/src/widgets/framework.dart:4922:5)
I/flutter (26328): #466 Element.updateChild (package:flutter/src/widgets/framework.dart:3350:15)
I/flutter (26328): #467 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4599:16)
I/flutter (26328): #468 Element.rebuild (package:flutter/src/widgets/framework.dart:4267:5)
I/flutter (26328): #469 ProxyElement.update (package:flutter/src/widgets/framework.dart:4922:5)
I/flutter (26328): #470 _InheritedNotifierElement.update (package:flutter/src/widgets/inherited_notifier.dart:181:11)
I/flutter (26328): #471 Element.updateChild (package:flutter/src/widgets/framework.dart:3350:15)
I/flutter (26328): #472 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6090:14)
I/flutter (26328): #473 Element.updateChild (package:flutter/src/widgets/framework.dart:3350:15)
I/flutter (26328): #474 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4599:16)
I/flutter (26328): #475 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4746:11)
I/flutter (26328): #476 Element.rebuild (package:flutter/src/widgets/framework.dart:4267:5)
I/flutter (26328): #477 StatefulElement.update (package:flutter/src/widgets/framework.dart:4778:5)
I/flutter (26328): #478 Element.updateChild (package:flutter/src/widgets/framework.dart:3350:15)
I/flutter (26328): #479 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6090:14)
I/flutter (26328): #480 Element.updateChild (package:flutter/src/widgets/framework.dart:3350:15)
I/flutter (26328): #481 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6090:14)
I/flutter (26328): #482 Element.updateChild (package:flutter/src/widgets/framework.dart:3350:15)
I/flutter (26328): #483 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4599:16)
I/flutter (26328): #484 Element.rebuild (package:flutter/src/widgets/framework.dart:4267:5)
I/flutter (26328): #485 ProxyElement.update (package:flutter/src/widgets/framework.dart:4922:5)
I/flutter (26328): #486 Element.updateChild (package:flutter/src/widgets/framework.dart:3350:15)
I/flutter (26328): #487 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4599:16)
I/flutter (26328): #488 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4746:11)
I/flutter (26328): #489 Element.rebuild (package:flutter/src/widgets/framework.dart:4267:5)
I/flutter (26328): #490 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2582:33)
I/flutter (26328): #491 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:875:21)
I/flutter (26328): #492 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:328:5)
I/flutter (26328): #493 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1144:15)
I/flutter (26328): #494 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1082:9)
I/flutter (26328): #495 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:998:5)
I/flutter (26328): #499 _invoke (dart:ui/hooks.dart:163:10)
I/flutter (26328): #500 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:259:5)
I/flutter (26328): #501 _drawFrame (dart:ui/hooks.dart:126:31)
I/flutter (26328): (elided 5 frames from class _AssertionError and dart:async)
I/flutter (26328):
I/flutter (26328): ════════════════════════════════════════════════════════════════════════════════════════════════════
I/flutter (26328): Another exception was thrown: LateInitializationError: Field '_tap@798245603' has not been initialized.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/foundation/node.dart': Failed assertion: line 112 pos 12: '_owner != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/foundation/node.dart': Failed assertion: line 112 pos 12: '_owner != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/foundation/node.dart': Failed assertion: line 112 pos 12: '_owner != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/foundation/node.dart': Failed assertion: line 112 pos 12: '_owner != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/foundation/node.dart': Failed assertion: line 112 pos 12: '_owner != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/foundation/node.dart': Failed assertion: line 112 pos 12: '_owner != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 4269 pos 14: 'owner!._debugCurrentBuildTarget == this': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 4269 pos 14: 'owner!._debugCurrentBuildTarget == this': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/foundation/node.dart': Failed assertion: line 112 pos 12: '_owner != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 4269 pos 14: 'owner!._debugCurrentBuildTarget == this': is not true.
I/chatty (26328): uid=10089(com.kyubook.kyubookapp) 1.ui identical 2 lines
I/flutter (26328): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 4269 pos 14: 'owner!._debugCurrentBuildTarget == this': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/foundation/node.dart': Failed assertion: line 112 pos 12: '_owner != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/foundation/node.dart': Failed assertion: line 112 pos 12: '_owner != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/foundation/node.dart': Failed assertion: line 112 pos 12: '_owner != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.
I/chatty (26328): uid=10089(com.kyubook.kyubookapp) 1.ui identical 2 lines
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/foundation/node.dart': Failed assertion: line 112 pos 12: '_owner != null': is not true.
I/chatty (26328): uid=10089(com.kyubook.kyubookapp) 1.ui identical 1 line
I/flutter (26328): Another exception was thrown: 'package:flutter/src/foundation/node.dart': Failed assertion: line 112 pos 12: '_owner != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/foundation/node.dart': Failed assertion: line 112 pos 12: '_owner != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/foundation/node.dart': Failed assertion: line 112 pos 12: '_owner != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.
I/chatty (26328): uid=10089(com.kyubook.kyubookapp) 1.ui identical 3 lines
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/foundation/node.dart': Failed assertion: line 112 pos 12: '_owner != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.
I/chatty (26328): uid=10089(com.kyubook.kyubookapp) 1.ui identical 2 lines
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 4269 pos 14: 'owner!._debugCurrentBuildTarget == this': is not true.
I/chatty (26328): uid=10089(com.kyubook.kyubookapp) 1.ui identical 1 line
I/flutter (26328): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 4269 pos 14: 'owner!._debugCurrentBuildTarget == this': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/foundation/node.dart': Failed assertion: line 112 pos 12: '_owner != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/foundation/node.dart': Failed assertion: line 112 pos 12: '_owner != null': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 4269 pos 14: 'owner!._debugCurrentBuildTarget == this': is not true.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 4269 pos 14: 'owner!._debugCurrentBuildTarget == this': is not true.
I/flutter (26328): Another exception was thrown: A GlobalKey was used multiple times inside one widget's child list.
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.
I/chatty (26328): uid=10089(com.kyubook.kyubookapp) 1.ui identical 18 lines
I/flutter (26328): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 1285 pos 12: 'child.parentData != null': is not true.