Flutter 插件url_launcher简介

 _launchURL() async { const url = '要加载的网页地址'; if (await canLaunch(url)) { await launch(url); } }

 Future launch( String urlString, { bool forceSafariVC, bool forceWebView, bool enableJavaScript, bool enableDomStorage, bool universalLinksOnly, Map headers, Brightness statusBarBrightness, }) async { assert(urlString != null); ........................................

 /// [forceSafariVC] is only used in iOS with iOS version >= 9.0. By default (when unset), the launcher /// opens web URLs in the Safari View Controller, anything else is opened /// using the default handler on the platform. If set to true, it opens the /// URL in the Safari View Controller. If false, the URL is opened in the /// default browser of the phone. Note that to work with universal links on iOS, /// this must be set to false to let the platform's system handle the URL. /// Set this to false if you want to use the cookies/context of the main browser /// of the app (such as SSO flows). This setting will nullify [universalLinksOnly] /// and will always launch a web content in the built-in Safari View Controller regardless /// if the url is a universal link or not.

 /// [forceWebView] is an Android only setting. If null or false, the URL is /// always launched with the default browser on device. If set to true, the URL /// is launched in a WebView. Unlike iOS, browser context is shared across /// WebViews.

 /// [enableJavaScript] is an Android only setting. If true, WebView enable /// javascript.

 /// [enableDomStorage] is an Android only setting. If true, WebView enable /// DOM storage.

 /// [universalLinksOnly] is only used in iOS with iOS version >= 10.0. This setting is only validated /// when [forceSafariVC] is set to false. The default value of this setting is false. /// By default (when unset), the launcher will either launch the url in a browser (when the /// url is not a universal link), or launch the respective native app content (when /// the url is a universal link). When set to true, the launcher will only launch /// the content if the url is a universal link and the respective app for the universal /// link is installed on the user's device; otherwise throw a [PlatformException].

 /// [statusBarBrightness] Sets the status bar brightness of the application /// after opening a link on iOS. Does nothing if no value is passed. This does /// not handle resetting the previous status bar style.

 Future launch( String urlString, { bool forceSafariVC, bool forceWebView, bool enableJavaScript, bool enableDomStorage, bool universalLinksOnly, Map headers, Brightness statusBarBrightness, }) async { assert(urlString != null); final Uri url = Uri.parse(urlString.trimLeft()); final bool isWebURL = url.scheme == 'http' || url.scheme == 'https'; if ((forceSafariVC == true || forceWebView == true) && !isWebURL) { throw PlatformException( code: 'NOT_A_WEB_SCHEME', message: 'To use webview or safariVC, you need to pass' 'in a web URL. This $urlString is not a web URL.'); } bool previousAutomaticSystemUiAdjustment; if (statusBarBrightness != null && defaultTargetPlatform == TargetPlatform.iOS) { previousAutomaticSystemUiAdjustment = WidgetsBinding.instance.renderView.automaticSystemUiAdjustment; WidgetsBinding.instance.renderView.automaticSystemUiAdjustment = true; SystemChrome.setSystemUIOverlayStyle(statusBarBrightness == Brightness.light ? SystemUiOverlayStyle.dark : SystemUiOverlayStyle.light); } final bool result = await UrlLauncherPlatform.instance.launch( urlString, useSafariVC: forceSafariVC ?? isWebURL, useWebView: forceWebView ?? false, enableJavaScript: enableJavaScript ?? false, enableDomStorage: enableDomStorage ?? false, universalLinksOnly: universalLinksOnly ?? false, headers: headers ?? {}, ); if (statusBarBrightness != null) { WidgetsBinding.instance.renderView.automaticSystemUiAdjustment = previousAutomaticSystemUiAdjustment; } return result; }

 if (Platform.isIOS) { launch(url, forceSafariVC: false, forceWebView: true); return; } if (Platform.isAndroid) { launch(url); }

 LaunchStatus launch( String url, Bundle headersBundle, boolean useWebView, boolean enableJavaScript, boolean enableDomStorage) { if (activity == null) { return LaunchStatus.NO_ACTIVITY; } Intent launchIntent; if (useWebView) { launchIntent = WebViewActivity.createIntent( activity, url, enableJavaScript, enableDomStorage, headersBundle); } else { launchIntent = new Intent(Intent.ACTION_VIEW) .setData(Uri.parse(url)) .putExtra(Browser.EXTRA_HEADERS, headersBundle); } activity.startActivity(launchIntent); return LaunchStatus.OK; }

 - (void)launchURLInVC:(NSString *)urlString result:(FlutterResult)result API_AVAILABLE(ios(9.0)) { NSURL *url = [NSURL URLWithString:urlString]; self.currentSession = [[FLTURLLaunchSession alloc] initWithUrl:url withFlutterResult:result]; __weak typeof(self) weakSelf = self; self.currentSession.didFinish = ^(void) { weakSelf.currentSession = nil; }; [self.topViewController presentViewController:self.currentSession.safari animated:YES completion:nil]; }

 - (void)launchURL:(NSString *)urlString call:(FlutterMethodCall *)call result:(FlutterResult)result { NSURL *url = [NSURL URLWithString:urlString]; UIApplication *application = [UIApplication sharedApplication]; if (@available(iOS 10.0, *)) { NSNumber *universalLinksOnly = call.arguments[@"universalLinksOnly"] ?: @0; NSDictionary *options = @{UIApplicationOpenURLOptionUniversalLinksOnly : universalLinksOnly}; [application openURL:url options:options completionHandler:^(BOOL success) { result(@(success)); }]; } else { #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wdeprecated-declarations" BOOL success = [application openURL:url]; #pragma clang diagnostic pop result(@(success)); } }

      ///IOS：