iOS 修改WKwebView字体大小

一个代理方法就搞定了

        _wkWebView.navigationDelegate = self;

- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation{

       [ webView evaluateJavaScript:@"document.getElementsByTagName('body')[0].style.webkitTextSizeAdjust= '300%'" completionHandler:nil];

    [ webView evaluateJavaScript:@"var script = document.createElement('script');"

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

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

     "var myimg,oldwidth;"

     "var maxwidth = 1000.0;" // UIWebView中显示的图片宽度

     "for(i=1;i <document.images.length;i++){"

     "myimg = document.images[i];"

     "oldwidth = myimg.width;"

     "myimg.width = maxwidth;"

     "}"

     "}\";"

     "document.getElementsByTagName('head')[0].appendChild(script);ResizeImages();" completionHandler:nil];

}