防止 Flutter WebView 溢出水平滚动轮播?
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【中文标题】防止 Flutter WebView 溢出水平滚动轮播?【英文标题】:Prevent Flutter WebView from Overflowing a Horizontally Scrolling Carousel? 【发布时间】:2021-02-12 11:01:58 【问题描述】:我正在使用 Flutter 中的 Perspectives Pageview 库来实现水平轮播。当我使用图像或文本等渲染常规 Containers
时,一切正常。
但是,当我嵌入 WebView 时,它会溢出其父 Container,并在移动 Widget 时调整大小:
我不确定是什么原因造成的,以及如何修复它,以便它像其他元素一样留在父元素中。
我的代码:
Container(
child: Center(
// Adding Child Widget of Perspective PageView
child: PerspectivePageView(
hasShadow: true, // Enable-Disable Shadow
shadowColor: Colors.black12,
children: <Widget>[
Container(
child: Column(
children: [
Expanded(
child: Container(
color: Colors.black54,
child: Container(
color: Colors.white,
child: Column(
children: [
Expanded(
child: WebViewPlus(
onWebViewCreated: (controller)
this._controller = controller;
controller
.loadString(_htmlForCardsList[0]);
,
javascriptMode: JavascriptMode.unrestricted,
),
)
],
)),
padding: EdgeInsets.all(2),
),
),
Container(
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(
"View Next",
style: TextStyle(
fontSize: 24.0,
fontWeight: FontWeight.w400,
color: Colors.orange),
),
],
),
height: 60,
decoration: BoxDecoration(
color: Colors.white,
border: Border(
top: BorderSide(color: Colors.black54, width: .3),
bottom: BorderSide(color: Colors.black54, width: 1.5),
left: BorderSide(color: Colors.black54, width: 1.5),
right: BorderSide(color: Colors.black54, width: 1.5),
),
),
),
],
),
color: Colors.orange)])))
我还尝试将WebView
的Expanded
父级替换为
Container(
width: 300,
height: 200,
child: WebViewPlus(
...
我遇到了同样的问题。水平滚动轮播后,WebView 的大小会发生变化,这与轮播中包含的其他内容不同。
非常感谢您的任何见解。
【问题讨论】:
【参考方案1】:您可以在下面复制粘贴运行完整代码 你可以使用包https://pub.dev/packages/flutter_inappwebview 代码sn-p
Expanded(
child: InAppWebView(
initialUrl: url,
initialHeaders: ,
initialOptions: InAppWebViewGroupOptions(
crossPlatform: InAppWebViewOptions(
debuggingEnabled: true,
),
),
onWebViewCreated:
(InAppWebViewController controller)
webView = controller;
print("onWebViewCreated");
webView.loadData(
data: _htmlForCardsList[0]);
,
工作演示
完整代码
import 'package:flutter/material.dart';
import 'package:flutter_inappwebview/flutter_inappwebview.dart';
import 'package:perspective_pageview/perspective_pageview.dart';
void main()
runApp(MyApp());
class MyApp extends StatelessWidget
@override
Widget build(BuildContext context)
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
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<MyHomePage>
InAppWebViewController webView;
String url = "about:blank";
double progress = 0;
bool status = false;
@override
dispose()
webView.stopLoading();
super.dispose();
List<String> _htmlForCardsList = [
'''<!DOCTYPE html><html><body><h1>My First Heading</h1><p>My first paragraph.</p></body></html>'''
];
@override
Widget build(BuildContext context)
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Container(
child: Center(
// Adding Child Widget of Perspective PageView
child: PerspectivePageView(
hasShadow: true, // Enable-Disable Shadow
shadowColor: Colors.black12,
children: <Widget>[
Container(
child: Column(
children: [
Expanded(
child: Container(
color: Colors.black54,
child: Container(
color: Colors.white,
child: Column(
children: [
Expanded(
child: InAppWebView(
initialUrl: url,
initialHeaders: ,
initialOptions: InAppWebViewGroupOptions(
crossPlatform: InAppWebViewOptions(
debuggingEnabled: true,
),
),
onWebViewCreated:
(InAppWebViewController controller)
webView = controller;
print("onWebViewCreated");
webView.loadData(
data: _htmlForCardsList[0]);
,
onLoadStart:
(InAppWebViewController controller,
String url)
print("start $status");
status = false;
,
onLoadStop:
(InAppWebViewController controller,
String url)
print("stop $status");
status = true;
,
onProgressChanged:
(InAppWebViewController controller,
int progress)
this.progress = progress / 100;
,
),
)
],
)),
padding: EdgeInsets.all(2),
),
),
Container(
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(
"View Next",
style: TextStyle(
fontSize: 24.0,
fontWeight: FontWeight.w400,
color: Colors.orange),
),
],
),
height: 60,
decoration: BoxDecoration(
color: Colors.white,
border: Border(
top: BorderSide(color: Colors.black54, width: .3),
bottom: BorderSide(color: Colors.black54, width: 1.5),
left: BorderSide(color: Colors.black54, width: 1.5),
right: BorderSide(color: Colors.black54, width: 1.5),
),
),
),
],
),
color: Colors.orange)
]))),
);
【讨论】:
非常感谢!我似乎遇到了一些奇怪的事情:如果我创建一个新项目并在 android 上运行它,它会按预期显示。但是,如果我在 ios 上运行相同的代码,问题仍然存在。知道为什么会这样吗? 我已将上述问题作为一个新问题添加到:***.com/questions/64612099/…,因为您的答案是针对该库的,并且确实按要求将 WebView 放置在容器内,而其他问题似乎是将 WebView 放入 Transform 中时特定于 ios,并适用于此轮播库之外。感谢您的任何意见!以上是关于防止 Flutter WebView 溢出水平滚动轮播?的主要内容,如果未能解决你的问题,请参考以下文章