Flutter之自定義Dialog實現版本更新彈窗功能的實現
阿新 • • 發佈:2020-07-24
功能點:
1.更新彈窗UI
2.強更與非強更且別控制
3.遮蔽物理返回鍵(因為強更的時候點選返回鍵,彈窗會消失)
4.點選彈窗外透明區域時,彈窗不消失
先看下效果圖:
Dialog實現程式碼:
import 'package:flutter/material.dart'; import 'package:xiaopijiang/utils/assets_util.dart'; import 'package:xiaopijiang/utils/toast_util.dart'; ///created by WGH ///on 2020/7/23 ///description:版本更新提示彈窗 class UpdateDialog extends Dialog { final String upDateContent; final bool isForce; UpdateDialog({this.upDateContent,this.isForce}); @override Widget build(BuildContext context) { return Center( child: Column( mainAxisAlignment: MainAxisAlignment.center,children: <Widget>[ Container( width: 319,height: 370,child: Stack( children: <Widget>[ Image.asset( AssetsUtil.getImagePath( imageName: 'bg_update',suffix: 'png'),fit: BoxFit.cover,),Container( width: double.infinity,child: Column( mainAxisAlignment: MainAxisAlignment.spaceBetween,children: <Widget>[ Container( margin: EdgeInsets.only(top: 110),child: Text('發現新版本',style: TextStyle( fontSize: 20,color: Colors.white,decoration: TextDecoration.none)),Text(upDateContent,style: TextStyle( fontSize: 16,color: Colors.black54,Container( width: 250,height: 42,margin: EdgeInsets.only(bottom: 15),child: RaisedButton( color: Colors.red,shape: StadiumBorder(),child: Text( '立即更新',style: TextStyle(fontSize: 20,color: Colors.white),onPressed: () { ToastUtil.showTips('下載apk'); }),) ],],GestureDetector( onTap: () { Navigator.pop(context); },child: Offstage( offstage: isForce,child: Container( margin: EdgeInsets.only(top: 30),child: Image.asset( AssetsUtil.getImagePath( imageName: 'ic_update_close',width: 35,height: 35,)),) ],); } static showUpdateDialog( BuildContext context,String mUpdateContent,bool mIsForce) { return showDialog( barrierDismissible: false,context: context,builder: (BuildContext context) { return WillPopScope( child: UpdateDialog( upDateContent: mUpdateContent,isForce: mIsForce),onWillPop: _onWillPop); }); } static Future<bool> _onWillPop() async{ return false; } }
呼叫Dialog:
_checkUpdate() async{ int serviceVersionCode = 101; PackageInfo packageInfo = await PackageInfo.fromPlatform(); //獲取當前的版本號 int currentVersionCode = int.parse(packageInfo.version.replaceAll('.','')); //如果獲取伺服器的版本號比當前應用程式的版本號還高,那麼提示升級 if (serviceVersionCode > currentVersionCode) { if(Platform.isAndroid){ //Android平臺在應用內進行更新 //彈出"版本更新"的對話方塊 UpdateDialog.showUpdateDialog(context,'1.修復已知bug\n2.優化使用者體驗',false); }else if(Platform.isIOS){ //iOS平臺跳轉道AppStore進行更新 } } }
重點說明:
遮蔽物理返回鍵(因為強更的時候點選返回鍵,彈窗會消失)
barrierDismissible: false,
4.點選彈窗外透明區域時,彈窗不消失
return WillPopScope( child: UpdateDialog( upDateContent: mUpdateContent,onWillPop: _onWillPop); static Future<bool> _onWillPop() async { return false; }
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