本文介绍了Flutter 实现下拉刷新上拉加载的示例代码，分享给大家，具体如下：
使用方法
添加依赖
dependencies:
pull_to_refresh: ^1.5.7导入包
import 'package:pull_to_refresh/pull_to_refresh.dart';页面代码样例
class _MyHomePageState extends State<MyHomePage> {
List<String> items = ["1", "2", "3", "4", "5", "6", "7", "8"];
RefreshController _refreshController =
RefreshController(initialRefresh: false);
void _onRefresh() async {
// monitor network fetch
await Future.delayed(Duration(milliseconds: 1000));
// if failed,use refreshFailed()
_refreshController.refreshCompleted();
}
void _onLoading() async {
// monitor network fetch
await Future.delayed(Duration(milliseconds: 1000));
// if failed,use loadFailed(),if no data return,use LoadNodata()
items.add((items.length + 1).toString());
if (mounted) setState(() {});
_refreshController.loadComplete();
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: SmartRefresher(
enablePullDown: true,
enablePullUp: true,
header: WaterDropHeader(),
footer: CustomFooter(
builder: (BuildContext context, LoadStatus mode) {
Widget body;
if (mode == LoadStatus.idle) {
body = Text("pull up load");
} else if (mode == LoadStatus.loading) {
body = CircularProgressIndicator();
} else if (mode == LoadStatus.failed) {
body = Text("Load Failed!Click retry!");
} else if (mode == LoadStatus.canLoading) {
body = Text("release to load more");
} else {
body = Text("No more Data");
}
return Container(
height: 55.0,
child: Center(child: body),
);
},
),
controller: _refreshController,
onRefresh: _onRefresh,
onLoading: _onLoading,
child: ListView.builder(
itemBuilder: (c, i) => Card(child: Center(child: Text(items[i]))),
itemExtent: 100.0,
itemCount: items.length,
),
),
);
}
}完整源代码
https://gitee.com/cxyzy1/flutter_pulldown_refresh
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