Flutter基础(手势检测GestureDetector)-二

import 'package:flutter/material.dart';

void main(){
  runApp(new MaterialApp(
    title: "flutter质感设计",
    home: new MyButton(),
  ));
}

class MyButton extends StatelessWidget{

  @override
  Widget build(BuildContext context) {
    // TODO: implement build
    return new GestureDetector(
      onTap: (){
        print("MyButton被监听!");
      },
      onDoubleTap: (){
        print("MyButton被双击了");
      },
      onLongPress: (){
        print("MyButton长按");
      },
      child: new Container(
        height: 36.0,
        padding: const EdgeInsets.all(8.0),
        margin: const EdgeInsets.symmetric(horizontal: 8.0),
        decoration: new BoxDecoration(
          borderRadius: new BorderRadius.circular(5.0),
          color: Colors.lightGreen[500]
        ),
        child: new Center(
          child: new Text("点击监听"),
        ),
      ),
    );
  }
}

GestureDetector控件没有图像展示,只是检测用户输入的手势。当用户点击Container时,GestureDetector会调用onTap回调,然后打印信息到控制台。你可以使用GestureDetector检测各种输入手势,包括点击、拖动和缩放。

许多控件使用GestureDetector为其他控件提供回调,比如IconButton、RaisedButton和FloatingActionButton控件有onPressed回调,当用户点击控件时触发回调。

GestureDetector:

onTap():点击事件回调;

onDoubleTap():双击事件回调;

onLongPress():长按事件回调

 

 

 

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