WKWebView与WebView实现html的图片与屏幕适配

NSString *strings =  modelXQ.ProductDescription;

       //拼接

       NSString *urlStr = [NSString stringWithFormat:@" %@",strings];

       [[NSURLCache sharedURLCache] removeAllCachedResponses];

       [self.webView loadHTMLString:urlStr baseURL:nil];