UIWebView 实现图片适应屏幕的宽度 文字内容的大小不变

第一步:

- (void)webViewDidFinishLoad:(UIWebView *)webView {

  NSString *js = @"function imgAutoFit() { \

     var imgs = document.getElementsByTagName('img'); \

     for (var i = 0; i < imgs.length; ++i) {\

        var img = imgs[i];   \

        img.style.maxWidth = %f;   \

     } \

  }";

  js = [NSString stringWithFormat:js, [UIScreen mainScreen].bounds.size.width - 20];

  

  [webView stringByEvaluatingJavaScriptFromString:js];

  [webView stringByEvaluatingJavaScriptFromString:@"imgAutoFit()"];

}

第二步:

//    webView.scalesPageToFit=YES;//这句话就不要在写了