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Flutter 无法在有状态小部件中使用参数_Flutter_Dart - Fatal编程技术网

Flutter 无法在有状态小部件中使用参数

Flutter 无法在有状态小部件中使用参数,flutter,dart,Flutter,Dart,我是Flatter的初学者,我有一个api,我使用Navigator将数据传递给这个路由,它工作得很好,但只有在我调用build方法中的参数时,build方法之外的参数才能被识别,我的目标是使用build方法之外的参数来创建一个使用id参数的api调用。问题在于getClubs方法和InitState方法 这是我试过的 import 'package:flutter/cupertino.dart'; import 'package:flutter/material.dart'; impor

我是Flatter的初学者,我有一个api,我使用Navigator将数据传递给这个路由,它工作得很好,但只有在我调用build方法中的参数时,build方法之外的参数才能被识别,我的目标是使用build方法之外的参数来创建一个使用id参数的api调用。问题在于getClubs方法和InitState方法

这是我试过的

   import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_svg/svg.dart';
import 'club_arguments.dart';
import 'package:http/http.dart' as http;
import 'dart:convert';


class ClubDetails extends StatefulWidget {

   final int id;
   final String name;
   final String image;
   final String rank;
   final String nationality;
   final String stadium;
   final  String manager;
   final String wins;
   final String draws;
   final String losses;
   final int goals;
   final int goalsIn;


   ClubDetails({ this.id, this.name,this.image,this.rank,this.nationality,this.stadium,this.manager,this.wins,this.draws,this.losses,this.goals,this.goalsIn});

  @override
  _ClubDetailsState createState() => _ClubDetailsState();
}

class _ClubDetailsState extends State<ClubDetails> {

  String stadium;
  String founded;


  getClub(int id) async {

    http.Response response = await http.get(
        'http://api.football-data.org/v2/teams/$id',
        headers: {'X-Auth-Token': '86014f6025ae430dba078acc94bb2647'});
    String body = response.body;
    Map data = jsonDecode(body);
    stadium = data['name'];

    //Club(this.id,this.name,this.image,this.rank,this.nationality,this.stadium,this.manager,this.wins,this.draws,this.losses,this.goals,this.goalsIn);
    setState(() {
      //print(data[0]['venue']);
      print(stadium);
    });
  }


  @override
  void initState() {
    super.initState();
    getClub(widget.id);
    print(widget.id);
  }
  @override
  Widget build(BuildContext context) {

    List<Titles> titles = [
      Titles("LA LIGA", "Spain","Barcelona","2008" ),
    ];


    
    return Scaffold(
      appBar: AppBar(
        title: Text("Club Info"),
        backgroundColor: Colors.blue[300],
        elevation: 0.0,
      ),
      body: Container(
          decoration: BoxDecoration(
              gradient: LinearGradient(
                  begin: Alignment.centerLeft,
                  end: Alignment.centerRight,
                  colors: [Colors.purple, Colors.blue])
          ),
          child: Container(
            decoration: BoxDecoration(
                gradient: LinearGradient(
                    begin: Alignment.topLeft,
                    end: Alignment.bottomRight,
                    colors: [Colors.purple, Colors.black38])),
            child: ListView(
              children: [
                SizedBox(
                  height: 20,
                ),
                Container(
                  width: double.infinity,
                  child:    Card(
                    elevation: 4.0,
                    shape: RoundedRectangleBorder(
                      borderRadius: BorderRadius.circular(10.0),
                    ),
                    child: Padding(
                      padding: const EdgeInsets.all(16.0),
                      child:
                      Row(
                        children: <Widget>[
                          Container(
                            height: 40,
                            width: 40,
                            child:
                            SvgPicture.network(widget.image,
                            ),
                          ),
                          const SizedBox(width:10.0),
                          Spacer(),
                          Column(
                            crossAxisAlignment: CrossAxisAlignment.end,
                            children: <Widget> [
                              Text(widget.name, style: TextStyle( fontWeight:FontWeight.bold,
                                fontSize: 18.0,
                              )),
                              const SizedBox(height: 5.0, ),
                              Text("rank : "+widget.rank, style: TextStyle( fontWeight:FontWeight.bold,
                                fontSize: 18.0,
                              )),
                              const SizedBox(height: 5.0, ),
                              Text("Found : "+widget.manager, style: TextStyle( fontWeight:FontWeight.bold,
                                fontSize: 18.0,
                              )),
                              const SizedBox(height: 5.0, ),
                              Text("Nationality : "+widget.nationality, style: TextStyle( fontWeight:FontWeight.bold,
                                fontSize: 18.0, color: Colors.grey[600],
                              )),
                              const SizedBox(height: 5.0, ),
                              Text("Stadium : "+widget.stadium, style: TextStyle( fontWeight:FontWeight.bold,
                                fontSize: 18.0, color: Colors.grey[600],
                              )),
                            ],
                          ),
                        ],
                      ),
                    ),
                  ),
                ),

                SizedBox(
                  height: 10,
                ),
                Container(
                  margin: EdgeInsets.fromLTRB(10, 0, 0, 10),
                  child:  Text(
                    "Achieved Titles",
                    style: TextStyle(fontSize: 17, fontWeight: FontWeight.w900, color: Colors.white),
                  ),
                ),

                SizedBox(
                  height: 10,
                ),
                Container(
                  margin: EdgeInsets.fromLTRB(5, 0, 5, 0),
                  child: ListView.builder(
                    shrinkWrap: true,
                    physics : NeverScrollableScrollPhysics(),
                    itemBuilder: (context, index){
                      return Card(
                        elevation: 4.0,
                        shape: RoundedRectangleBorder(
                          borderRadius: BorderRadius.circular(10.0),
                        ),
                        child: Padding(
                          padding: const EdgeInsets.all(16.0),
                          child:
                          Row(
                            children: <Widget>[
                              CircleAvatar(
                                backgroundImage: NetworkImage("https://www.impacttrophies.co.uk/content/images/thumbs/0065685_tower-football-trophy-gold.jpeg"),
                              ),
                              const SizedBox(width:10.0),
                              Spacer(),
                              Column(
                                crossAxisAlignment: CrossAxisAlignment.end,
                                children: <Widget> [
                                  Text(titles[index].name, style: TextStyle( fontWeight:FontWeight.bold,
                                    fontSize: 18.0,
                                  )),
                                  const SizedBox(height: 5.0, ),
                                  Text("country : "+titles[index].country, style: TextStyle( fontWeight:FontWeight.bold,
                                    fontSize: 18.0, color: Colors.grey[600],
                                  )),
                                  const SizedBox(height: 5.0, ),
                                  Text("club : "+titles[index].club, style: TextStyle( fontWeight:FontWeight.bold,
                                    fontSize: 18.0, color: Colors.grey[600],
                                  )),
                                  const SizedBox(height: 5.0, ),
                                  Text("year : "+titles[index].year, style: TextStyle( fontWeight:FontWeight.bold,
                                    fontSize: 18.0, color: Colors.grey[600],
                                  )),
                                ],
                              ),

                            ],
                          ),
                        ),
                      );
                    },
                    itemCount: titles.length,
                  ),
                ),
                SizedBox(
                  height: 70,
                ),
              ],
            ),

          )
      ),
    );
  }
}


class Stats{

  String title;
  String result;

  Stats(this.title,this.result);

}

class Team {

  String name;
  String image;
  String date;

  Team(this.name,this.image,this.date);

}


class Titles {
  String name;
  String country;
  String club;
  String year;

  Titles(this.name,this.country,this.club,this.year);

}

class Club {

  int id;
  String name;
  String image;
  String rank;
  String nationality;
  String stadium;
  String manager;
  String wins;
  String draws;
  String losses;
  int goals;
  int goalsIn;


  Club(this.id, this.name, this.image, this.rank, this.nationality,
      this.stadium, this.manager, this.wins, this.draws, this.losses,
      this.goals, this.goalsIn);

}
import'包装:flift/cupertino.dart';
进口“包装:颤振/材料.省道”;
导入“package:flatter_svg/svg.dart”;
导入“club_arguments.dart”;
将“package:http/http.dart”导入为http;
导入“dart:convert”;
类ClubDetails扩展了StatefulWidget{
最终int id;
最后的字符串名;
最终字符串图像;
最后的字符串秩;
最终国籍;
最后的弦乐场;
最终字符串管理器;
最后的弦乐获胜;
最后的字符串绘制;
最终管柱损失;
最终目标;
最终目标;
俱乐部详情({this.id,this.name,this.image,this.rank,this.national,this.stadium,this.manager,this.wins,this.draw,this.loss,this.goalsIn});
@凌驾
_ClubDetailsState createState()=>\u ClubDetailsState();
}
类_clubdetailssState扩展状态{
弦球场;
字符串创建;
getClub(内部id)异步{
http.Response-Response=等待http.get(
'http://api.football-data.org/v2/teams/$id',
标题:{'X-Auth-Token':'86014f6025ae430dba078acc94bb2647'});
字符串体=response.body;
地图数据=jsonDecode(主体);
体育场=数据['name'];
//俱乐部(这个。id,这个。姓名,这个。形象,这个。等级,这个。国籍,这个。体育场,这个。经理,这个。赢,这个。平局,这个。输,这个。进球,这个。进球);
设置状态(){
//打印(数据[0][“地点]);
印刷品(体育场);
});
}
@凌驾
void initState(){
super.initState();
getClub(widget.id);
打印(widget.id);
}
@凌驾
小部件构建(构建上下文){
列表标题=[
标题(“西甲”、“西班牙”、“巴塞罗那”、“2008”),
];
返回脚手架(
appBar:appBar(
标题:文本(“俱乐部信息”),
背景颜色:颜色。蓝色[300],
标高:0.0,
),
主体:容器(
装饰:盒子装饰(
梯度:线性梯度(
开始:Alignment.centerLeft,
结束:对齐。中间右侧,
颜色:[颜色。紫色,颜色。蓝色])
),
子:容器(
装饰:盒子装饰(
梯度:线性梯度(
开始:Alignment.topLeft,
结束:对齐。右下角,
颜色:[colors.purple,colors.black38]),
子:ListView(
儿童:[
大小盒子(
身高:20,
),
容器(
宽度:double.infinity,
孩子:卡片(
标高:4.0,
形状:圆形矩形边框(
边界半径:边界半径。圆形(10.0),
),
孩子:填充(
填充:常数边集全部(16.0),
儿童:
划船(
儿童:[
容器(
身高:40,
宽度:40,
儿童:
SvgPicture.network(widget.image,
),
),
常量大小框(宽度:10.0),
垫片(),
纵队(
crossAxisAlignment:crossAxisAlignment.end,
儿童:[
Text(widget.name,style:TextStyle(fontwweight:fontwweight.bold,
字体大小:18.0,
)),
const SizedBox(高度:5.0,),
Text(“rank:+widget.rank,style:TextStyle(fontWeight:fontWeight.bold,
字体大小:18.0,
)),
const SizedBox(高度:5.0,),
Text(“找到:”+widget.manager,样式:TextStyle(fontWeight:fontWeight.bold,
字体大小:18.0,
)),
const SizedBox(高度:5.0,),
文本(“国籍:”+widget.national,样式:TextStyle(fontWeight:fontWeight.bold,
fontSize:18.0,颜色:Colors.灰色[600],
)),
const SizedBox(高度:5.0,),
Text(“Stadium:+widget.Stadium,style:TextStyle(fontWeight:fontWeight.bold,
fontSize:18.0,颜色:Colors.灰色[600],
)),
],
),
],
),
),
),
),
大小盒子(
身高:10,
),
容器(
边距:从LTRB(10,0,0,10)开始的边距集,
子:文本(
“获得的头衔”,
样式:TextStyle(fontSize:17,fontWeight:fontWeight.w900,颜色:Colors.white),
),
),
大小盒子(
身高:10,
),
容器(
边距:从LTRB(5,0,5,0)开始的边距集,
子项:ListView.builder(
收缩膜:对,
物理学:NeverscrollableScroll物理学(),
物品制造商:(公司)
    class ClubDetails extends StatefulWidget {
       final int id ;

       ClubDetails({this.id});

      @override
      _ClubDetailsState createState() => _ClubDetailsState();
    }
  @override
  void initState() {
    super.initState();
    getClub(widget.id);
  }
ClubDetails(id : 1);
class Home extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Issue66934490(name: 'name');
  }
}

class Issue66934490 extends StatefulWidget {
  final String name;
  
  Issue66934490({
    this.name,
  });
  
  @override
  _Issue66934490State createState() => _Issue66934490State();
}

class _Issue66934490State extends State<Issue66934490> {
  @override
  Widget build(BuildContext context) {
    return Container(
      child: Text(widget.name),
    );
  }
}