ios - Swift WKWebview初始缩放和放大

// MARK: WebView lazy var webView: WKWebView = { let webConfiguration = WKWebViewConfiguration() let webView = WKWebView(frame: .zero, configuration: webConfiguration) webView.uiDelegate = self webView.scrollView.delegate = self webView.navigationDelegate = self webView.translatesAutoresizingMaskIntoConstraints = false webView.contentMode = .center webView.scrollView.isScrollEnabled = true webView.allowsBackForwardNavigationGestures = false webView.scrollView.zoomScale = 2.0 webView.backgroundColor = appGrey return webView }()

NSString *_wa_initial_zoom = @"var meta = document.createElement('meta'); meta.name = 'viewport'; meta.content = 'width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no'; var head = document.getElementsByTagName('head')[0]; head.appendChild(meta);"; NSString *source = [self wkWebViewSetInitialZoomScale]; WKUserScript *wkUScript = [[WKUserScript alloc] initWithSource:source injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:NO]; WKUserContentController *wkUController = [[WKUserContentController alloc] init]; [wkUController addUserScript:wkUScript]; WKWebViewConfiguration *wkWebConfig = [[WKWebViewConfiguration alloc] init]; wkWebConfig.websiteDataStore = WKWebsiteDataStore.defaultDataStore; wkWebConfig.userContentController = wkUController; wkWebConfig.preferences = [[WKPreferences alloc] init]; wkWebConfig.preferences.minimumFontSize = 10; // JavaScript wkWebConfig.preferences.javaScriptEnabled = YES; wkWebConfig.preferences.javaScriptCanOpenWindowsAutomatically = YES; wkWebConfig.processPool = [[WKProcessPool alloc] init]; WKWebView *_wkWebView = [[WKWebView alloc] initWithFrame:_wkWebView.bounds configuration:wkWebConfig];