FutureBuilder运行两次错误

Question

我为

添加了调试点

• future: _futureData

• Future getRegister1() async{首先运行getRegister1()，然后运行future: _futureData，然后再次运行getRegister1()两次 屏幕上出现_mainCategory状态小部件

  class _mainCategory extends State<mainCategory3> {
    Future _futureData;
  
    @override
    void initState() {
        super.initState();    
        _futureData = getRegister1();
    }
  
    @override
    Widget build(BuildContext context) {
  
      return Scaffold(
  

  体内的FutureBuilder

  body: FutureBuilder(
    future: _futureData,
       builder: (BuildContext context, AsyncSnapshot snapshot) {
  

  getRegister1（）

     Future getRegister1() async {
      //this data coming from cache (sqflite)
      List _catLocal = (await HelperDatabase1().displayRegisterCat());
      List _defCatLocal = (await HelperDatabase1().display());
  ...
  }
  

完整代码https://github.com/flutter/flutter/issues/31838