iOS WKWebView加载HTML适应屏幕

    //以下代码适配大小
    NSString *jScript = @"var meta = document.createElement('meta'); meta.setAttribute('name', 'viewport'); meta.setAttribute('content', 'width=device-width'); document.getElementsByTagName('head')[0].appendChild(meta);";
    
    WKUserScript *wkUScript = [[WKUserScript alloc] initWithSource:jScript injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:YES];
    WKUserContentController *wkUController = [[WKUserContentController alloc] init];
    [wkUController addUserScript:wkUScript];
    
    WKWebViewConfiguration *wkWebConfig = [[WKWebViewConfiguration alloc] init];
    wkWebConfig.userContentController = wkUController;
    
    WKWebView *titles = [[WKWebView alloc] initWithFrame:CGRectMake(0, 0, width, height) configuration:wkWebConfig];
    [self.view addSubview:titles];
    [titles loadHTMLString:@"HTML" baseURL:nil];