我是新手,正在制作我的第一個 webview 應用程式。在這里,每當用戶嘗試單擊鏈接或頁面加載時,我都會嘗試添加一個微調器。我想讓微調器背景不透明度有點低,就像給定的例子(右圖)一樣,但不透明度根本不起作用。
這是我的方法:
// ignore_for_file: prefer_const_constructors
// ignore: use_key_in_widget_constructors
import 'package:flutter/material.dart';
import 'package:webview_flutter/webview_flutter.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: Scaffold(
body: WebViewClass()
)
);
}
}
class WebViewClass extends StatefulWidget {
WebViewState createState() => WebViewState();
}
class WebViewState extends State<WebViewClass>{
int position = 1 ;
final key = UniqueKey();
doneLoading(String A) {
setState(() {
position = 0;
});
}
startLoading(String A){
setState(() {
position = 1;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: null,
body: SafeArea(child: IndexedStack(
index: position,
children: <Widget>[
WebView(
initialUrl: 'https://google.com',
javascriptMode: JavascriptMode.unrestricted,
key: key ,
onPageFinished: doneLoading,
onPageStarted: startLoading,
),
Container(
color: Colors.white70,
child: Center(
child: CircularProgressIndicator()),
),
]))
);
}
}
任何幫助或指導將不勝感激。
uj5u.com熱心網友回復:
你可以這樣試試。每次進入網路視圖螢屏時。裝載機將顯示。
class WebViewClass extends StatefulWidget {
WebViewState createState() => WebViewState();
}
class WebViewState extends State<WebViewClass> {
bool isLoading = false;
final key = UniqueKey();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: null,
body: SafeArea(
child: IgnorePointer(
ignoring: isLoading,
child: Stack(
children: [
WebView(
initialUrl: 'https://google.com',
javascriptMode: JavascriptMode.unrestricted,
key: key,
onPageFinished: (value) {
setState(() {
isLoading = false;
});
},
onPageStarted: (value) {
setState(() {
isLoading = true;
});
},
),
isLoading ? Container(
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height,
color: Colors.grey.withOpacity(0.5),
child: const Center(child: CircularProgressIndicator()) ,
) : Container(),
],
),
)),);
}
}
轉載請註明出處,本文鏈接:https://www.uj5u.com/qiye/351833.html
