oc中的js

//去除长按后出现的文本选取框
[webView stringByEvaluatingJavaScriptFromString:@"document.documentElement.style.webkitUserSelect='none';"];
//隐藏
[webView stringByEvaluatingJavaScriptFromString:@"document.getElementsByClassName('cont_header')[0].style.display ='none';"];
//赋值
[webView stringByEvaluatingJavaScriptFromString:@"document.getElementsByClassName('loginTop')[0].innerHTML = '';"];
//marginTop
[webView stringByEvaluatingJavaScriptFromString:@"document.getElementsByClassName('cont_body_selectFace')[0].style.marginTop = 10 +"px";"];
//高度
[webView stringByEvaluatingJavaScriptFromString:@"document.getElementsByClassName('cont_body_head')[0].style.height = 120 +"px";"];
//弹框
[webView stringByEvaluatingJavaScriptFromString:@"window.alert=null;"];