android - flutter - _AssertionError ('package:flutter/src/widgets/framework.dart' : Failed assertion: line 4937 pos 12: 'child == _child' : is not true.)错误

Question

我收到这样的错误:

════════ Exception caught by widgets library ═══════════════════════════════════
The following assertion was thrown building Builder(dependencies: [MediaQuery]):
'package:flutter/src/widgets/framework.dart': Failed assertion: line 4937 pos 12: 'child == _child': is not true.
package:flutter/…/widgets/framework.dart:4937
2

Either the assertion indicates an error in the framework itself, or we should provide substantially more information in this error message to help you determine and fix the underlying cause.
In either case, please report this assertion by filing a bug on GitHub:
  https://github.com/flutter/flutter/issues/new?template=2_bug.md

The relevant error-causing widget was
GetMaterialApp

这段代码给出了错误:

  @override
  Widget build(BuildContext context) {
    return GetMaterialApp(
      home: Scaffold(
        body: Column(

如何解决这个问题？

Answer 1

您肯定多次使用GetMaterialApp。

如果你有这样的事情:

void main() {
  runApp(
     const GetMaterialApp(
       debugShowCheckedModeBanner: false,
     home: MyApp(),
    )
  );
}

您不应在 build 方法中再次使用 GetMaterialApp。您应该在那里使用标准的MaterialApp。