Flutter 限制按钮点击的时间间隔

有时候需要防止用户误点击按钮,特别是用flutter web做前端, 和后端交互的时候.

通过对点击按钮事件的时间间隔做控制,来实现对按钮点击的控制.

方法定义

  var  lastPopTime = DateTime.now();

  void intervalClick(int needTime){
   // 防重复提交
   if(lastPopTime == null || DateTime.now().difference(lastPopTime) > Duration(seconds: needTime)){
     print(lastPopTime);
     lastPopTime = DateTime.now();
     print("允许点击");
   }else{
     // lastPopTime = DateTime.now(); //如果不注释这行,则强制用户一定要间隔2s后才能成功点击. 而不是以上一次点击成功的时间开始计算.
     print("请勿重复点击！");
   }
 }


调用
 floatingActionButton: FloatingActionButton(
 onPressed:(){
   intervalClick(2);
 },
 tooltip: 'Increment',
 child: Icon(Icons.add),
      ), 

完整demo代码
import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
 
 primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

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

class _MyHomePageState extends State {
  
  int _counter = 0;

  var  lastPopTime = DateTime.now();

  void intervalClick(int needTime){
   // 防重复提交
   if(lastPopTime == null || DateTime.now().difference(lastPopTime) > Duration(seconds: needTime)){
     print(lastPopTime);
     lastPopTime = DateTime.now();
     print("允许点击");
   }else{
     // lastPopTime = DateTime.now(); //如果不注释这行,则强制用户一定要间隔2s后才能成功点击. 而不是以上一次点击成功的时间开始计算.
     print("请勿重复点击！");
   }
 }

  @override
  Widget build(BuildContext context) {
    
    return Scaffold(
      appBar: AppBar(
 
 title: Text(widget.title),
      ),
      body: Center(
 
 child: Column(
  
   mainAxisAlignment: MainAxisAlignment.center,
   children: [
     
     Text(
'You have pushed the button this many times:',
     ),
     Text(
'$_counter',
style: Theme.of(context).textTheme.headline4,
     ),
   
   ],
 ),
      ),
      floatingActionButton: FloatingActionButton(
 onPressed:(){
   intervalClick(2);
 },
 tooltip: 'Increment',
 child: Icon(Icons.add),
      ), 
    );
  }
}

Flutter 限制按钮点击的时间间隔

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