android – 错误：类’SingleTickerProviderStateMixin’不能用作mixin,因为它扩展了Object以外的类

概述只是学习扑动动画.使用SingleTickerProviderStateMixin IDE给我这个错误： The class ‘SingleTickerProviderStateMixin’ can’t be used as a mixin because it extends a class other than Object 我的代码： import 'package:flutter/mate 只是学习扑动动画.使用SingleTickerProvIDerStateMixin IDE给我这个错误：

The class ‘SingleTickerProvIDerStateMixin’ can’t be used as a mixin because
it extends a class other than Object

我的代码：

import 'package:Flutter/material.dart';  class AnimationControllerOutputbody extends StatefulWidget with  {    @overrIDe    _AnimationControllerOutputbodyState createState() =>        new _AnimationControllerOutputbodyState();  }  class _AnimationControllerOutputbodyState extends State<AnimationControllerOutputbody> with SingleTickerProvIDerStateMixin {    AnimationController animation;    @overrIDe    voID initState() {      super.initState();      animation = new AnimationController(        vsync: this,duration: new Duration(seconds: 3),);      animation.addListener(() {        this.setState(() {});      });    }    @overrIDe    Widget build(BuildContext context) {      return new GestureDetector(        child: new Center(          child: new Text(            animation.isAnimating                ? animation.value.toStringAsFixed(3)                : "Tap me!",style: new TextStyle(              FontSize: 50.0,),onTap: () {          animation.forward(from: 0.0);        },);    }    @overrIDe    voID dispose() {      animation.dispose();      super.dispose();    }  }

我的代码有什么问题？

解决方法 添加到analysis_options.yaml

analyzer:  language:    enableSuperMixins: true

另见https://github.com/flutter/flutter/blob/master/analysis_options.yaml#L24

总结

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