问题描述
我是Flutter的新手,我正在开发一个学习的网页。 我想使用两个iframe放置Google地图和Facebook Feed。
我的代码基于Wangoo的代码: https://medium.com/flutter-community/flutter-web-and-iframe-f26399aa1e2a
如果我仅使用一个iframe,则效果很好,但是如果使用第二个iframe,则它具有第一个来源,而第一个则不显示任何内容。像这样: https://imgur.com/a/eWq2GU5
已经测试了其他一些程序包,但是大多数程序包与网络不兼容,或者无法使用具有此类链接的iframe
这是我的代码:
import 'package:flutter/material.dart';
//ignore: avoid_web_libraries_in_flutter
import 'dart:html';
import 'dart:ui' as ui;
void main() => runApp(new MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Flutter Demo',theme: new ThemeData(
primarySwatch: Colors.blue,),home: new MyHomePage(title: 'Flutter Demo Home Page'),);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key,this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
String linkMaps = 'https://www.google.com/maps/embed?pb=!1m18!1m12!1m3!1d10500.899078315058!2d2.29133003705264!3d48.853924135746475!2m3!1f0!2f0!3f0!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x47e6701f7e8337b5%3A0xa2cb58dd28914524!2sEiffel%20Tower%2C%20Par%C3%ADs%2C%20Francia!5e0!3m2!1ses-419!2smx!4v1597383453609!5m2!1ses-419!2smx';
String linkFB = 'https://www.facebook.com/plugins/page.php?href=https%3A%2F%2Fwww.facebook.com%2FTourEiffel&tabs=timeline&width=340&height=500&small_header=false&adapt_container_width=true&hide_cover=false&show_facepile=true&appId';
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text(widget.title),body: Container(
child: Row(
mainAxisAlignment: MainAxisAlignment.center,children: [
Container(color: Colors.red,child: new IframeScreen(400,400,linkMaps)),Container(color: Colors.blue,child: new IframeScreen(340,linkFB))
],)
);
}
}
//--------------------------------------------------------------------------I
//Code based on: Aseem Wangoo (Mar-22) I
//https://medium.com/flutter-community/flutter-web-and-iframe-f26399aa1e2a I
//--------------------------------------------------------------------------I
// ignore: must_be_immutable
class IframeScreen extends StatefulWidget {
double w;
double h;
String src;
IframeScreen(double _w,double _h,String _src){
this.w = _w;
this.h = _h;
this.src = _src;
}
@override
_IframeScreenState createState() => _IframeScreenState(w,h,src);
}
class _IframeScreenState extends State<IframeScreen> {
Widget _iframeWidget;
final IFrameElement _iframeElement = IFrameElement();
double _width;
double _height;
String _source;
_IframeScreenState(double _w,String _src){
_width = _w;
_height = _h;
_source = _src;
}
@override
void initState() {
super.initState();
_iframeElement.src = _source;
_iframeElement.style.border = 'none';
// ignore: undefined_prefixed_name
ui.platformViewRegistry.registerViewFactory(
'iframeElement',(int viewId) => _iframeElement,);
_iframeWidget = HtmlElementView(
key: UniqueKey(),viewType: 'iframeElement',);
}
@override
Widget build(BuildContext context) {
return SizedBox(
height: _height,width: _width,child: _iframeWidget,);
}
}
谢谢:)
解决方法
是的,您可以在Flutter网站中使用两个iframe。
但是,如果那样做将无法正常工作。 相反,在我的代码中,我传递了链接。
只需使用两个具有不同viewID的IframeWidget。 在这里,我用它在我的网站上获得了我的社交媒体项目。
GraphrMedia (Go to Work Section) [Might take 12 sec time to load.]
printf -v VERSION_CODE '%(%Y%m.%d.%H%M)T'
,
这是一个更简洁的 iframe 小部件版本:
//ignore: avoid_web_libraries_in_flutter
import 'dart:html';
import 'dart:ui' as ui;
import 'package:flutter/material.dart';
class IframeView extends StatefulWidget {
final String source;
const IframeView({Key key,@required this.source}) : super(key: key);
@override
_IframeViewState createState() => _IframeViewState();
}
class _IframeViewState extends State<IframeView> {
// Widget _iframeWidget;
final IFrameElement _iframeElement = IFrameElement();
@override
void initState() {
super.initState();
_iframeElement.src = widget.source;
_iframeElement.style.border = 'none';
//ignore: undefined_prefixed_name
ui.platformViewRegistry.registerViewFactory(
widget.source,//use source as registered key to ensure uniqueness
(int viewId) => _iframeElement,);
}
@override
Widget build(BuildContext context) {
return HtmlElementView(
key: UniqueKey(),viewType: widget.source,);
}
}
请注意,从 Dart SDK 中的 this change 起,抑制 undefined_prefixed_name
错误不再有效。但是有一个未解决的问题要恢复 here。
然后您可以使用大小框内的小部件来限制它的高度/宽度。这是在脚手架主体中使用它的示例:
//main.dart
import 'package:flutter/material.dart';
void main() async {
runApp(IFrameTesterApp());
}
class IFrameTesterApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: Text('IFrame Tester App'),centerTitle: true,),body: IframeView(source: "https://url.to.resource")),theme: ThemeData.light(),);
}
}