在构建期间调用flutter showdialog setState或markNeedsBuild

问题描述

我有一个流构建器，它读取一个Firestore数据库，然后根据该响应。这是目前我数据库中列出的一些信息，但是我想为数据库中出现的特定值添加一个弹出屏幕，当我添加showdialog函数时，它开始给我

    ════════ Exception caught by widgets library ═══════════════════════════════════════════════════════
setState() or markNeedsBuild() called during build.

错误。我怎样才能解决这个问题？我的代码如下。预先感谢。

//This is the function causing errors.      
_showMaterialDialog (String type) {
        if(type=="win"){
          gameResult = "You Win,Gratz!";
        }else if(type=="lose"){
          gameResult = "You Lose :(";
        }
        print("buraya girdi");
        print(gameResult);
        showDialog(
            context: context,builder: (_) => AlertDialog(
              title: Text("Result"),content: Text(gameResult),actions: <Widget>[
                FlatButton(
                  child: Text('Close'),onPressed: () {
                    //Navigator.of(context).pop();
                    Navigator.pushNamed(context,HomeScreen.id);
                  },)
              ],));
      }
    
      @override
      Widget build(BuildContext context) {
        if(_error) {
          return Text('error-game',textDirection: TextDirection.ltr);
        }
    
        // Show a loader until FlutterFire is initialized
        if (!_initialized) {
          return Text('Loading',textDirection: TextDirection.ltr);
        }
        return StreamBuilder<DocumentSnapshot>(
          stream: userSnapshot,builder: (BuildContext context,AsyncSnapshot<DocumentSnapshot> snapshot) {
            if (snapshot.hasError) {
              return Text('Something went wrong');
            }
    
            if (snapshot.connectionState == ConnectionState.waiting) {
              return Text("Loading");
            }
            if(snapshot.hasData){
              Map<String,dynamic> userDocument  = snapshot.data.data();
              print(collectionPath);
              print(docPath);
              print(snapshot.data);
              print(userDocument);
              gameResult = userDocument['status'];

//this is place function called

              if(gameResult =="win" || gameResult =="lose"){
                return _showMaterialDialog(gameResult);
              }


              kullanicisayilari = userDocument['atilansayi'];
              List<dynamic> kullanicisayilariDuz = [];
              List<dynamic> rakipsayilariDuz = [];
              List<dynamic> sonuclarDuz = [];
              for (var numbers in kullanicisayilari){
                var splittedNumber = numbers.split('|');
                kullanicisayilariDuz.add(splittedNumber[0]);
              }
              rakipsayilari = userDocument['rakipsallama'];
              sonuc = userDocument['sonuc'];
              for (var sonuclar in sonuc){
                var splittedSonuc = sonuclar.split('|');
                sonuclarDuz.add(splittedSonuc[0]);
              }
              for (var rakipsayi in rakipsayilari){
                var splittedRakipSayi = rakipsayi.split('|');
                rakipsayilariDuz.add(splittedRakipSayi[0]);
              }
              print(myNumbers.decimals);
              return MaterialApp(
                home:Scaffold(
                  appBar: AppBar(
                    backgroundColor: Colors.amberAccent,title: Text('Sayı Avı Oyun Ekranı'),),body:Column(
                    children: <Widget>[
                      Expanded(
                        flex: 80,child: Row(
                          children: <Widget>[
                            Expanded(
                              flex: 40,child: Column(
                                children: <Widget>[
                                  for(var numbers in kullanicisayilariDuz)Text(numbers),]
                              ),Expanded(
                              flex: 10,child: Column(
                                  children: <Widget>[
                                    for(var numbers in sonuclarDuz)Text(numbers),Expanded(
                              flex: 50,child: Column(
                                children: <Widget>[
                                  for(var numbers in rakipsayilariDuz)Text(numbers),],Expanded(
                        flex:10,child: Row(
                          mainAxisAlignment: MainAxisAlignment.center,children: <Widget>[
                            showDeleteNumbers(1,'numberimage1'),showDeleteNumbers(2,'numberimage2'),showDeleteNumbers(3,'numberimage3'),showDeleteNumbers(4,'numberimage4'),Expanded(
                              child:FlatButton(
                                onPressed: (){
                                  sendnumber();
                                },child: Image.asset('images/send.png'),Expanded(
                        flex: 10,child: Row(
                          children: <Widget>[
                            attachNumber('1','one.png'),attachNumber('2','two.png'),attachNumber('3','three.png'),attachNumber('4','four.png'),attachNumber('5','five.png'),attachNumber('6','six.png'),attachNumber('7','seven.png'),attachNumber('8','eight.png'),attachNumber('9','nine.png'),attachNumber('0','zero.png'),);
            }
          },);
      }

    }

解决方法

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