ios失去焦点隐藏键盘开始

//如果当前触摸点不在input上,那么都失去焦点
    function objBlurFun(sDom,time){
        var time = time||300;
        var browser={
            versions:function(){
                var u = navigator.userAgent, app = navigator.appVersion;
                return {
                    ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), //ios终端
                };
            }(),
            language:(navigator.browserLanguage || navigator.language).toLowerCase()
        }
        if(browser.versions.ios){
            var obj = document.querySelectorAll(sDom);
            for(var i=0;i<obj.length;i++){
                objBlur(obj[i],time);
            }
        }
    }
    // ios元素失去焦点隐藏键盘
    function objBlur(sdom,time){
        var time = time||30;
        if(sdom){
            sdom.addEventListener("focus", function(){
                document.addEventListener("touchend", docTouchend,false);
            },false);

        }else{
            throw new Error("objBlur()没有找到元素");
        }
        var docTouchend = function(event){
            if(event.target!= sdom){
                setTimeout(function(){
                    sdom.blur();
                    document.removeEventListener('touchend', docTouchend,false);
                },time);
            }
        };

    }

objBlurFun("textarea,input");