iOS开发日记：WkWebView 图片自适应屏幕

在webView 加载html Finish后，使用javaScript 修改image的样式，达到图片自适应屏幕，代码具体如下：

NSString *js=@"var script = document.createElement('script');"

"script.type = 'text/javascript';"

"script.text = \"function ResizeImages() { "

"var myimg,oldwidth;"

"var maxwidth = %f;"

"for(i=0;i

"myimg = document.images[i];"

"if(myimg.width > maxwidth){"

"oldwidth = myimg.width;"

"myimg.width = %f;"

"}"

"}"

"}\";"

"document.getElementsByTagName('head')[0].appendChild(script);";

js = [NSString stringWithFormat:js,[UIScreen mainScreen].bounds.size.width,[UIScreen mainScreen].bounds.size.width-15];

[webView evaluateJavaScript:js completionHandler:nil];

[webView evaluateJavaScript:@"ResizeImages();"completionHandler:nil];