功能点：
1.更新弹窗UI
2.强更与非强更且别控制
3.屏蔽物理返回键（因为强更的时候点击返回键，弹窗会消失）
4.点击弹窗外透明区域时，弹窗不消失
先看下效果图：
Dialog实现代码：
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:版本更新提示弹窗
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('发现新版本',
style: TextStyle(
fontSize: 20,
color: Colors.white,
decoration: TextDecoration.none)),
),
Text(upDateContent,
style: TextStyle(
fontSize: 16,
color: Colors.black54,
decoration: TextDecoration.none)),
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('下载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', suffix: 'png'),
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;
}
}
调用Dialog：
_checkUpdate() async{
int serviceVersionCode = 101;
PackageInfo packageInfo = await PackageInfo.fromPlatform();
//获取当前的版本号
int currentVersionCode = int.parse(packageInfo.version.replaceAll('.', ''));
//如果获取服务器的版本号比当前应用程序的版本号还高，那么提示升级
if (serviceVersionCode > currentVersionCode) {
if(Platform.isAndroid){
//Android平台在应用内进行更新
//弹出"版本更新"的对话框
UpdateDialog.showUpdateDialog(context, '1.修复已知bug\n2.优化用户体验', false);
}else if(Platform.isIOS){
//iOS平台跳转道AppStore进行更新
}
}
}
重点说明：
屏蔽物理返回键（因为强更的时候点击返回键，弹窗会消失）
barrierDismissible: false,
4.点击弹窗外透明区域时，弹窗不消失
return WillPopScope(
child: UpdateDialog(
upDateContent: mUpdateContent, isForce: mIsForce),
onWillPop: _onWillPop);
static Future<bool> _onWillPop() async {
return false;
}
