企业网站托管平台有哪些,马帮erp是干嘛的,企业如何进行搜索引擎优化,wordpress编辑教程文章目录 为什么要调用js1. flutter-web1. 引入js web/index.html2. 创建工具js web/CryptoEnc.js3. 创建对应的lib/js/js_interop.dart4. 由于引入的js是针对web平台的#xff0c;所以引入需要做引入处理5. 使用 2. Android1. 引入依赖2. index.html3. dart引用 为什么要调用… 文章目录 为什么要调用js1. flutter-web1. 引入js web/index.html2. 创建工具js web/CryptoEnc.js3. 创建对应的lib/js/js_interop.dart4. 由于引入的js是针对web平台的所以引入需要做引入处理5. 使用 2. Android1. 引入依赖2. index.html3. dart引用 为什么要调用js JavaScript拥有庞大且成熟的工具生态系统 1. flutter-web
1. 引入js web/index.html !-- Add the required JS libraries --script srchttps://cdnjs.cloudflare.com/ajax/libs/crypto-js/4.2.0/crypto-js.min.js integritysha512-aSUDuwNzXDvz4XrIcXHuCf089/iJAoN4lmrXJg18XnduKK6YlDHNRalv4yd1N40OKI80tFidFrqTFKGPoWFQ crossoriginanonymous referrerpolicyno-referrer/scriptscript srchttps://cdnjs.cloudflare.com/ajax/libs/crypto-js/4.2.0/md5.min.js integritysha512-ENWhXylET8kWcArT6ijA6HpVEALRmvzYBayGL6oFWl96exmq8Fjgxe2K6TAblHLP75Sa/a1YjHpIZRt9hGOQ crossoriginanonymous referrerpolicyno-referrer/script!-- Register the js file where the logic is written --script srcCryptoEnc.js typeapplication/javascript/script2. 创建工具js web/CryptoEnc.js
function CryptoEnc() {}CryptoEnc.prototype.encrypt function(toEncObj){var toEnc toEncObj.value;var encrypted CryptoJS.MD5(toEnc);return encrypted;
}CryptoEnc.prototype.testFunc function(toEncObj2){var toEnc toEncObj2.value;return bbbbtestFunctoEnc;
}
3. 创建对应的lib/js/js_interop.dart
// #1
JS()
library js_interop;// The above two lines are required
import package:js/js.dart;// #2
JS()
class CryptoEnc {external CryptoEnc();external String encrypt(ToEncrypt toEncrypt);external String testFunc(ToEncrypt2 toEncrypt2);
}// #3
JS()
anonymous
class ToEncrypt {external String get value;external factory ToEncrypt({String value});
}
JS()
anonymous
class ToEncrypt2 {external String get value;external factory ToEncrypt2({String value});
}
4. 由于引入的js是针对web平台的所以引入需要做引入处理
///encrypt.dart
class ToEncrypt {final String value;ToEncrypt({required this.value,});
}class ToEncrypt2 {final String value;ToEncrypt2({required this.value,});
}class CryptoEnc {CryptoEnc();String encrypt(ToEncrypt toEncrypt) {// We are not implementing any encryption for mobile for now.// This is just for demonstration.throw UnimplementedError();}String testFunc(ToEncrypt2 toEncrypt) {// We are not implementing any encryption for mobile for now.// This is just for demonstration.throw UnimplementedError();}
}///export_encrypt.dart
export encrypt.dart if (dart.library.js) js_interop.dart;5. 使用 var encVal CryptoEnc().encrypt(ToEncrypt(value: aaaaaa,),);var encVal2 CryptoEnc().testFunc(ToEncrypt2(value: cccc,));print(encVal);print(testFunc$encVal2);2. Android
1. 引入依赖
webview_flutter: ^4.4.22. index.html
!DOCTYPE html
html
headtitleTest js dart/title/head
body
scriptfunction inputClick (url) {console.log(inputClickurl);}function playUrl(url) {console.log(playUrlurl);}function startPlay() {console.log(startPlay);}function postMsg() {console.log(postMsg);//向dart发送消息Print.postMessage(postMsg);}/script
/body
/html3. dart
import package:flutter/material.dart;
import package:tvboxstudy/log_extensions.dart;
import package:webview_flutter/webview_flutter.dart;class LocalHtmlWebView extends StatefulWidget {const LocalHtmlWebView({super.key});overrideLocalHtmlWebViewState createState() LocalHtmlWebViewState();
}class LocalHtmlWebViewState extends StateLocalHtmlWebView {late String localHtmlContents;late WebViewController controller;ValueNotifierbool isShowLoading ValueNotifier(true);overridevoid initState() {super.initState();initController();loadLocalHtml();_registerJavascriptChannel();}void runJS(int type) {if (type 1) {controller.runJavaScript(inputClick();,);} else if (type 2) {controller.runJavaScript(startPlay();,);}else if (type 3) {controller.runJavaScript(postMsg();,);} else if (type 4) {controller.runJavaScript(playUrl(https://media.w3.org/2010/05/sintel/trailer.mp4);,);}}void _registerJavascriptChannel() {controller.addJavaScriptChannel(Print,onMessageReceived: (JavaScriptMessage message) {//收到消息做相应的处理print(onMessageReceived${message.message});},);}void initController() {controller WebViewController()..setJavaScriptMode(JavaScriptMode.unrestricted)..setBackgroundColor(Colors.transparent)..setJavaScriptMode(JavaScriptMode.unrestricted)..setNavigationDelegate(NavigationDelegate(onProgress: (int progress) {progress$progress.log();if (progress 100) {isShowLoading.value false;}},onPageStarted: (String url) {},onPageFinished: (String url) {controller.runJavaScriptReturningResult(document.body.scrollHeight).then((value) {scrollHeight$value.log();});},onWebResourceError: (WebResourceError error) {},onNavigationRequest: (NavigationRequest request) {if (request.url.startsWith(https://www.youtube.com/)) {return NavigationDecision.prevent;}return NavigationDecision.navigate;},),);}void loadLocalHtml() async {controller.loadFlutterAsset(assets/www/player/index2.html);}overrideWidget build(BuildContext context) {return Scaffold(body: Column(children: [Row(children: [TextButton(onPressed: (){runJS(1);}, child: Text(inputClick)),TextButton(onPressed: (){runJS(2);}, child: Text(startPlay)),TextButton(onPressed: (){runJS(3);}, child: Text(postMsg)),TextButton(onPressed: (){runJS(4);}, child: Text(playUrl)),],),Expanded(child: Stack(children: [WebViewWidget(controller: controller,),ValueListenableBuilder(valueListenable: isShowLoading,builder: (BuildContext context, bool value, Widget? child) {return isShowLoading.value? const Center(child: CircularProgressIndicator(color: Colors.white,)): const SizedBox.shrink();},)],),),],),);}
}
引用
Utilizing JS Library for Flutter Web
