scrollspy.js--bug

/**
* 20140505 14.33 ycx
* scrollspy.js中存在的bug！！！---为什么ui.tabs必须在scrollspy.js中的window.onload之前执行，也就是必须在scrollspy初始化之前执行
* 1 scrollspy中的process函数中的scrollTop数值在tabs组件之后的都存在计算错误，是因为scrollspy初始化后，已经计算好整个页面的scrollTop等数组(offsets)，而这时候ui.tabs进行初始化，
* 就会把tab页的其他暂时不显示出来的内容都隐藏起来，就会导致整个页面的scrollTop等方面的数值改变了，所以在tab之后的组件都会在scrollspy中存在偏差！！
* 针对这种情况，临时的解决方法是：
* 方法一： 将ui.tabs()在scrollspy初始化之前执行--如将ui.tabs()放到document.ready回调函数中执行(因为scrollspy是在window.onload回调函数执行的)
* 方法二： 将scrollspy初始化的函数拿出来，在ui.tabs()执行之后再开始初始化。
*
* 2 也就是说，如果其他组件或者js脚本会改变页面的scrollTop等方面的内容，那么估计都要采用上述两种方法来解决。
*/

1 ui.js---是我自己写的组件库

2 scrollspy.js可在bootstrap官网下载单独的源文件

scrollspy.js代码，具体如下所示：

/* ========================================================================
 * Bootstrap: scrollspy.js v3.0.3
 * http://getbootstrap.com/javascript/#scrollspy
 * ========================================================================
 * Copyright 2013 Twitter, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ======================================================================== */
+ function($) {"use strict";

    // SCROLLSPY CLASS DEFINITION
    // ==========================

    function ScrollSpy(element, options) {
        var href
        var process = $.proxy(this.process, this)

        this.$element = $(element).is('body') ? $(window) : $(element)
        this.$body = $('body')
        this.$scrollElement = this.$element.on('scroll.bs.scroll-spy.data-api', process)
        //console.log(this.$scrollElement);
        this.options = $.extend({}, ScrollSpy.DEFAULTS, options)
        this.selector = (this.options.target || (( href = $(element).attr('href')) && href.replace(/.*(?=#[^s]+$)/, ''))//strip for ie7
        || '') + ' .nav li > a'
        //console.log(this.selector);
        this.offsets = $([])
        this.targets = $([])
        this.activeTarget = null

        this.refresh()
        this.process()
    }


    ScrollSpy.DEFAULTS = {
        offset : 10
    }

    ScrollSpy.prototype.refresh = function() {
        var offsetMethod = this.$element[0] == window ? 'offset' : 'position'
        //console.log(offsetMethod,11);

        this.offsets = $([])
        this.targets = $([])

        var self = this
        var $targets = this.$body.find(this.selector).map(function() {
            var $el = $(this)
            var href = $el.data('target') || $el.attr('href')
            var $href = /^#w/.test(href) && $(href)
            //console.log($el,"--",href,"--",$href);
            console.log($href[offsetMethod]().top, "-------", $href[0].offsetTop, $href[0].id);
            //console.log($href,$href["offset"]().top,"-----------");

            return ($href && $href.length && [[$href[offsetMethod]().top + (!$.isWindow(self.$scrollElement.get(0)) && self.$scrollElement.scrollTop()), href]]) || null
        }).sort(function(a, b) {
            return a[0] - b[0]
        }).each(function() {
            //console.log(this);
            self.offsets.push(this[0])
            self.targets.push(this[1])
        })
    }

    ScrollSpy.prototype.process = function() {
        //这里存在问题--scrollTop
        var scrollTop = this.$scrollElement.scrollTop() + this.options.offset
        console.log("scrollTop--->>>" + scrollTop);
        var scrollHeight = this.$scrollElement[0].scrollHeight || this.$body[0].scrollHeight
        var maxScroll = scrollHeight - this.$scrollElement.height()
        var offsets = this.offsets
        //console.log(offsets);
        var targets = this.targets
        var activeTarget = this.activeTarget
        var i

        if (scrollTop >= maxScroll) {
            return activeTarget != ( i = targets.last()[0]) && this.activate(i)
        }

        //console.log(scrollTop,offsets,)

        for ( i = offsets.length; i--; ) {
            //activeTarget != targets[i] && scrollTop >= offsets[i] && (!offsets[i + 1] || scrollTop <= offsets[i + 1]) && this.activate(targets[i])

            //activeTarget != targets[i] && scrollTop >= offsets[i] && (!offsets[i + 1] || scrollTop <= offsets[i + 1]) && this.activate(targets[i+1])
            activeTarget != targets[i] && scrollTop >= offsets[i] && (!offsets[i + 1] || scrollTop <= offsets[i + 1]) && this.activate(targets[i])
        }
    }

    ScrollSpy.prototype.activate = function(target) {
        console.log("target===>>>", target);
        this.activeTarget = target;

        $(this.selector).parents('.active').removeClass('active')

        var selector = this.selector + '[data-target="' + target + '"],' + this.selector + '[href="' + target + '"]'

        var active = $(selector).parents('li').addClass('active')

        if (active.parent('.dropdown-menu').length) {
            active = active.closest('li.dropdown').addClass('active')
        }

        active.trigger('activate.bs.scrollspy')
    }
    // SCROLLSPY PLUGIN DEFINITION
    // ===========================

    var old = $.fn.scrollspy;

    $.fn.scrollspy = function(option) {
        return this.each(function() {
            var $this = $(this)
            var data = $this.data('bs.scrollspy')
            var options = typeof option == 'object' && option

            if (!data)
                $this.data('bs.scrollspy', ( data = new ScrollSpy(this, options)))
            if ( typeof option == 'string')
                data[option]()
        })
    }

    $.fn.scrollspy.Constructor = ScrollSpy;

    // SCROLLSPY NO CONFLICT
    // =====================

    $.fn.scrollspy.noConflict = function() {
        $.fn.scrollspy = old;
        return this;
    }
    // SCROLLSPY DATA-API
    // ==================

    $(window).on('load', function() {
        $('[data-spy="scroll"]').each(function() {
            var $spy = $(this);
            $spy.scrollspy($spy.data());
        })
    })
}(jQuery);