zepto scrollTop 解决方法

之前自己遇到问题，网上找了一篇大牛写的代码

1:使用方法复制下面代码

$.fn.scrollTo =function(options){

        var defaults = {

            toT : 0,    //滚动目标位置

            durTime : 500,  //过渡动画时间

            delay : 30,     //定时器时间

            callback:null   //回调函数

        };

        var opts = $.extend(defaults,options),

            timer = null,

            _this = this,

            curTop = _this.scrollTop(),//滚动条当前的位置

            subTop = opts.toT - curTop,    //滚动条目标位置和当前位置的差值

            index = 0,

            dur = Math.round(opts.durTime / opts.delay),

            smoothScroll = function(t){

                index++;

                var per = Math.round(subTop/dur);

                if(index >= dur){

                    _this.scrollTop(t);

                    window.clearInterval(timer);

                    if(opts.callback && typeof opts.callback == 'function'){

                        opts.callback();

                    }

                    return;

                }else{

                    _this.scrollTop(curTop + index*per);

                }

            };

        timer = window.setInterval(function(){

            smoothScroll(opts.toT);

        }, opts.delay);

        return _this;

    };

2：调用方法：$("body").scrollTo({toT:500});距离、时间还有回调函数参数传递就行了

 

转自：http://www.cnblogs.com/skyHF/p/4720308.html