Flutter Widget之Tooltip

Widget：https://flutter.io/docs/development/ui/widgets
Tooltip：https://docs.flutter.io/flutter/material/Tooltip-class.html
     

import 'package:flutter/material.dart';

class TooltipDemoPage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() => new _TooltipDemoPagePageState();
}

class _TooltipDemoPagePageState extends State<TooltipDemoPage> {
  @override
  void initState() {
    super.initState();
  }

  Widget build(BuildContext context) {
    return Scaffold(
        appBar: new AppBar(
          title: new Text('Tooltip Demo'),
        ),
        body: Center(
          child: Tooltip(
            message: "点击删除",
            child: Icon(
              Icons.delete,
              size: 50.0,
            ),
            preferBelow: false,
          ),
        ),
    );
  }
}