使用 Map 而不是 List 来查看列表视图

3 回答

• 8

  只需从键中创建一个列表，然后使用索引获取值以获取地图键并使用它来获取地图值

  var keys = myMap.keys.toList();
  var val = myMap[keys[idx]]
  

  回复于 2024-04-20T20:39:02+08:00
• 7

  有可能，你可以做这样的事情

  map.forEach((key, value) {
          // here you can write your logic using "Value object",
         // make new object of your list view item and
         // add it to it's  builder list using 
  
         setState(() {
            _builderList.insert(0, itemObject);
         });
  
     });
  

  或者你可以试试

  final list = map.values.toList(growable: {true/false});
  // play with your list
  

  回复于 2024-04-20T20:39:02+08:00
• 2

  它有点晚了但你也可以试试这个。地图值= snapshot.data;

  return new ListView.builder(
    itemCount: values.length,
    itemBuilder: (BuildContext context, int index) {
      String key = values.keys.elementAt(index);
      return new Column(
        children: <Widget>[
          new ListTile(
            title: new Text("$key"),
            subtitle: new Text("${values[key]}"),
          ),
          new Divider(
            height: 2.0,
          ),
        ],
      );
    },
  );
  

  有关更详细的示例，请查看https://kodestat.gitbook.io/flutter/39-flutter-listviewbuilder-using-dart-maps

  回复于 2024-04-20T20:39:02+08:00