Flutter:动态生成ListTile

使用自定义方法动态生成ListTile

```
    import 'package:flutter/material.dart';
    import '../../res/ListData.dart';

    class Holiday extends StatelessWidget {

     List<Widget> _getData(){
       var templist = listData.map((item){
         return ListTile(
           title: Text(item["title"]),
           leading: Image.network(item["imageUrl"]),
           subtitle: Text(item["author"]),
         );
       });
      //  print(templist.runtimeType);
      //  注意list类型经过map处理过后返回的是一个MappedListIterable<dynamic, ListTile>类型 需要将其转换为List类型
       return templist.toList();
     }

      @override
      Widget build(BuildContext context) {
        return Scaffold(
          appBar: AppBar(
            title: Text("新闻"),
            centerTitle: true,
          ),
          body: ListView(
            // scrollDirection: Axis.vertical,
            children: this._getData(),
            // reverse: true,
            controller: ScrollController(),
            padding: EdgeInsets.only(left:20,top:20,right:20,bottom:20),

          )
        );
      }
    }

```

• 使用ListView的builder方法

  	import 'package:flutter/material.dart';
      //import '../../res/ListData.dart';
  
      class Holiday extends StatelessWidget {
  
       List<Widget> list = new List();
       Holiday(){
         for(int i = 0;i<20;i++){
           this.list.add(ListTile(
             title: Text("这是第$i条数据"),
           ));
         }
       }
  
        @override
        Widget build(BuildContext context) {
          return Scaffold(
            appBar: AppBar(
              title: Text("新闻"),
              centerTitle: true,
            ),
            body: ListView.builder(
              itemCount: this.list.length,
              itemBuilder: (context,index){
                return this.list[index];
              },     
            )
          );
        }
      }
  

  或者

  import 'package:flutter/material.dart';
  //import '../../res/ListData.dart';
  
  class Holiday extends StatelessWidget {
  
   List list = new List();
   Holiday(){
     for(int i = 0;i<20;i++){
       this.list.add("这是第$i条数据");
     }
   }
  
    @override
    Widget build(BuildContext context) {
      return Scaffold(
        appBar: AppBar(
          title: Text("新闻"),
          centerTitle: true,
        ),
        body: ListView.builder(
          itemCount: this.list.length,
          itemBuilder: (context,index){
            return ListTile(
              title: Text(
                this.list[index]
              )
            );
          },     
        )
      );
    }
  }