iOS-WKWebView 加载HTML字符自适应文字和图片

加载HTML字符串内容时，字体自适应屏幕问题处理，在创建 WKWebView 时，注入相关的js：

WKWebViewConfiguration *wkWebConfig = [[WKWebViewConfiguration alloc] init];
NSString *jSString = @"var meta = document.createElement('meta'); meta.setAttribute('name', 'viewport'); meta.setAttribute('content', 'width=device-width'); document.getElementsByTagName('head')[0].appendChild(meta);";
WKUserScript *script = [[WKUserScript alloc] initWithSource:jSString injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:YES];

对于图片处理，图片高度自适应,在html富文本中加入

 NSString *htmls = [NSString stringWithFormat:@" \n"
                               " \n"
                               " \n"
                               " \n"
                               ""
                               "%@"
                               ""
                               "",htmlString];
    
    [self.webView loadHTMLString:htmls baseURL:nil];