Line 361: | Line 361: | ||
</div> | </div> | ||
</div> | </div> | ||
+ | |||
+ | <script> | ||
+ | $(function() { | ||
+ | |||
+ | function DirectoryNav($h,config){ | ||
+ | this.opts = $.extend(true,{ | ||
+ | scrollThreshold:0.5, //滚动检测阀值 0.5在浏览器窗口中间部位 | ||
+ | scrollSpeed:700, //滚动到指定位置的动画时间 | ||
+ | scrollTopBorder:400, //滚动条距离顶部多少的时候显示导航,如果为0,则一直显示 | ||
+ | easing: 'swing', //不解释 | ||
+ | delayDetection:200, //延时检测,避免滚动的时候检测过于频繁 | ||
+ | scrollChange:function(){} | ||
+ | },config); | ||
+ | this.$win = $(window); | ||
+ | this.$h = $h; | ||
+ | this.$pageNavList = ""; | ||
+ | this.$pageNavListLis =""; | ||
+ | this.$curTag = ""; | ||
+ | this.$pageNavListLiH = ""; | ||
+ | this.offArr = []; | ||
+ | this.curIndex = 0; | ||
+ | this.scrollIng = false; | ||
+ | this.init(); | ||
+ | } | ||
+ | |||
+ | DirectoryNav.prototype = { | ||
+ | init:function(){ | ||
+ | this.make(); | ||
+ | var Thisss = this; | ||
+ | setInterval(function(){ | ||
+ | Thisss.offArr = []; | ||
+ | Thisss.$h.each(function(){ | ||
+ | var $This = $(this), | ||
+ | offT = Math.round($This.offset().top); | ||
+ | Thisss.offArr.push(offT-200); | ||
+ | }); | ||
+ | // alert(JSON.stringify(Thisss.offArr)); | ||
+ | },1000); | ||
+ | this.bindEvent(); | ||
+ | }, | ||
+ | make:function(){ | ||
+ | $("body").append('<div class="directory-nav" id="directoryNav"><ul></ul><span class="cur-tag"></span><span class="c-top"></span><span class="c-bottom"></span><span class="line"></span></div>'); | ||
+ | var $hs = this.$h, | ||
+ | $directoryNav = $("#directoryNav"), | ||
+ | temp = [], | ||
+ | index1 = 0, | ||
+ | index2 = 0; | ||
+ | $hs.each(function(index){ | ||
+ | var $this = $(this), | ||
+ | text = $this.text(); | ||
+ | if(!$this.hasClass("h2_title")){ | ||
+ | index1++; | ||
+ | if(index1%2==0) index2 = 0; | ||
+ | temp.push('<li class="l1"><span class="c-dot"></span><a class="l1-text">'+text+'</a></li>'); | ||
+ | }else{ | ||
+ | index2++; | ||
+ | temp.push('<li class="l2"><a class="l2-text">'+text+'</a></li>'); | ||
+ | |||
+ | } | ||
+ | }); | ||
+ | $directoryNav.find("ul").html(temp.join("")); | ||
+ | |||
+ | this.$pageNavList = $directoryNav; | ||
+ | this.$pageNavListLis = this.$pageNavList.find("li"); | ||
+ | this.$curTag = this.$pageNavList.find(".cur-tag"); | ||
+ | this.$pageNavListLiH = this.$pageNavListLis.eq(0).height(); | ||
+ | |||
+ | if(!this.opts.scrollTopBorder){ | ||
+ | this.$pageNavList.show(); | ||
+ | } | ||
+ | }, | ||
+ | posTag:function(top){ | ||
+ | this.$curTag.css({top:top+'px'}); | ||
+ | }, | ||
+ | ifPos:function(st){ | ||
+ | var offArr = this.offArr; | ||
+ | var windowHeight = Math.round(this.$win.height()); | ||
+ | for(var i=0;i<offArr.length;i++){ | ||
+ | if((offArr[i] - windowHeight + 650) < st) { | ||
+ | var $curLi = this.$pageNavListLis.eq(i), | ||
+ | tagTop = $curLi.position().top; | ||
+ | $curLi.addClass("cur").siblings("li").removeClass("cur"); | ||
+ | if($curLi.hasClass("l2")){ | ||
+ | this.$curTag.addClass("cur2"); | ||
+ | }else{ | ||
+ | this.$curTag.removeClass("cur2"); | ||
+ | } | ||
+ | this.curIndex = i; | ||
+ | this.posTag(tagTop-6); | ||
+ | this.opts.scrollChange.call(this); | ||
+ | } | ||
+ | } | ||
+ | }, | ||
+ | bindEvent:function(){ | ||
+ | var This = this, | ||
+ | show = false, | ||
+ | timer = 0; | ||
+ | this.$win.on("scroll",function(){ | ||
+ | var $this = $(this); | ||
+ | clearTimeout(timer); | ||
+ | timer = setTimeout(function(){ | ||
+ | This.scrollIng = true; | ||
+ | if($this.scrollTop()>This.opts.scrollTopBorder){ | ||
+ | if(!This.$pageNavListLiH) This.$pageNavListLiH = This.$pageNavListLis.eq(0).height(); | ||
+ | if(!show){ | ||
+ | This.$pageNavList.fadeIn(); | ||
+ | show = true; | ||
+ | } | ||
+ | This.ifPos( $(this).scrollTop() ); | ||
+ | }else{ | ||
+ | if(show){ | ||
+ | This.$pageNavList.fadeOut(); | ||
+ | show = false; | ||
+ | } | ||
+ | } | ||
+ | },This.opts.delayDetection); | ||
+ | }); | ||
+ | |||
+ | this.$pageNavList.on("click","li",function(){ | ||
+ | var $this = $(this), | ||
+ | index = $this.index(); | ||
+ | This.scrollTo(This.offArr[index]); | ||
+ | }) | ||
+ | }, | ||
+ | scrollTo: function(offset,callback) { | ||
+ | var This = this; | ||
+ | $('html,body').animate({ | ||
+ | scrollTop: offset | ||
+ | }, this.opts.scrollSpeed, this.opts.easing, function(){ | ||
+ | This.scrollIng = false; | ||
+ | // callback && this.tagName.toLowerCase()=='body' && callback(); | ||
+ | if(callback){ | ||
+ | if(this.tagName.toLowerCase()=='body'){ | ||
+ | callback(); | ||
+ | } | ||
+ | } | ||
+ | }); | ||
+ | } | ||
+ | }; | ||
+ | |||
+ | var directoryNav = new DirectoryNav($(".h1_title,.h2_title"),{ | ||
+ | scrollTopBorder:400 //滚动条距离顶部多少的时候显示导航,如果为0,则一直显示 | ||
+ | }); | ||
+ | }); | ||
+ | |||
+ | |||
+ | </script> |
Revision as of 05:43, 25 October 2017