function objBlur(obj, time){

    if(typeof obj != 'string') return false;

    var obj = document.getElementById(obj),

    time = time || 300,

    docTouchend = function(event){

        if(event.target!= obj){

            setTimeout(function(){

                 obj.blur();

                document.removeEventListener('touchend', docTouchend,false);

            },time);

        }

    };

    if(obj){

        obj.addEventListener('focus', function(){

            //注释这部分是在一个页面多个这样的调用时禁止冒泡让他不要让ios默认输入框上下弹，最好写在对应页面里给对应元素写这里效率低，这种写法很差所以先注释掉下次优化再贴

            // var input = document.getElementsByTagName('input'),

            // ilength = input.length;

            // for(var i=0; i<ilength; i++){

            //     input[i].addEventListener('touchend',function(e){e.stopPropagation()},false);

            // }

            // var textarea = document.getElementsByTagName('textarea'),

            // tlength = textarea.length;

            // for(var i=0; i<tlength; i++){

            //     textarea[i].addEventListener('touchend',function(e){e.stopPropagation()},false);

            // }

            document.addEventListener('touchend', docTouchend,false);

        },false);

    }else{

        //找不到obj

    }

}

调用方法如下

var isIPHONE = navigator.userAgent.toUpperCase().indexOf('IPHONE')!= -1;

            if(isIPHONE){

                var input = o.objBlur,

                input2 = new input('realName'),

                input3 = new input('telphone'),

                input4 = new input('address'),

                input2 = input3 = input4 = null;

            }