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+/*
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+ * 移动端模拟导航可点击自动滑动 0.1.4
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+ * Date: 2017-01-11
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+ * by: xiewei
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+ * 导航可左右滑动,可点击边缘的一个,自动滚动下一个到可视范围【依赖于iscroll.js】
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+ */
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+(function ($) {
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+ $.fn.navbarscroll = function (options) {
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+ //各种属性、参数
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+ var _defaults = {
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+ className:'cur', //当前选中点击元素的class类名
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+ clickScrollTime:300, //点击后滑动时间
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+ duibiScreenWidth:0.4, //单位以rem为准,默认为0.4rem
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+ scrollerWidth:3, //单位以px为准,默认为3,[仅用于特殊情况:外层宽度因为小数点造成的不精准情况]
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+ defaultSelect:0, //初始选中第n个,默认第0个
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+ fingerClick:0, //目标第0或1个选项触发,必须每一项长度一致,方可用此项
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+ endClickScroll:function(thisObj){}//回调函数
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+ }
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+ var _opt = $.extend(_defaults, options);
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+ this.each(function () {
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+ //插件实现代码
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+ var _wrapper = $(this);
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+ var _win = $(window);
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+ var _win_width = _win.width(),_wrapper_width = _wrapper.width(),_wrapper_off_left = _wrapper.offset().left;
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+ var _wrapper_off_right=_win_width-_wrapper_off_left-_wrapper_width;
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+ var _obj_scroller = _wrapper.children('.scroller');
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+ var _obj_ul = _obj_scroller.children('ul');
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+ var _obj_li = _obj_ul.children('li');
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+ var _scroller_w = 0;
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+ _obj_li.css({"margin-left":"0","margin-right":"0"});
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+ for (var i = 0; i < _obj_li.length; i++) {
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+ _scroller_w += _obj_li[i].offsetWidth;
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+ }
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+ _obj_scroller.width(_scroller_w+_opt.scrollerWidth);
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+ var myScroll = new IScroll('#'+_wrapper.attr('id'), {
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+ eventPassthrough: true,
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+ scrollX: true,
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+ scrollY: false,
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+ preventDefault: false
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+ });
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+ _init(_obj_li.eq(_opt.defaultSelect));
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+ _obj_li.click(function(){
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+ _init($(this));
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+ });
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+ //解决PC端谷歌浏览器模拟的手机屏幕出现莫名的卡顿现象,滑动时禁止默认事件(2017-01-11)
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+ _wrapper[0].addEventListener('touchmove',function (e){e.preventDefault();},false);
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+ function _init(thiObj){
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+ var $this_obj=thiObj;
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+ var duibi=_opt.duibiScreenWidth*_win_width/10,this_index=$this_obj.index(),this_off_left=$this_obj.offset().left,this_pos_left=$this_obj.position().left,this_width=$this_obj.width(),this_prev_width=$this_obj.prev('li').width(),this_next_width=$this_obj.next('li').width();
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+ var this_off_right=_win_width-this_off_left-this_width;
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+ if(_scroller_w+2>_wrapper_width){
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+ if(_opt.fingerClick==1){
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+ if(this_index==1){
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+ myScroll.scrollTo(-this_pos_left+this_prev_width,0, _opt.clickScrollTime);
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+ }else if(this_index==0){
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+ myScroll.scrollTo(-this_pos_left,0, _opt.clickScrollTime);
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+ }else if(this_index==_obj_li.length-2){
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+ myScroll.scrollBy(this_off_right-_wrapper_off_right-this_width,0, _opt.clickScrollTime);
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+ }else if(this_index==_obj_li.length-1){
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+ myScroll.scrollBy(this_off_right-_wrapper_off_right,0, _opt.clickScrollTime);
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+ }else{
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+ if(this_off_left-_wrapper_off_left-(this_width*_opt.fingerClick)<duibi){
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+ myScroll.scrollTo(-this_pos_left+this_prev_width+(this_width*_opt.fingerClick),0, _opt.clickScrollTime);
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+ }else if(this_off_right-_wrapper_off_right-(this_width*_opt.fingerClick)<duibi){
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+ myScroll.scrollBy(this_off_right-this_next_width-_wrapper_off_right-(this_width*_opt.fingerClick),0, _opt.clickScrollTime);
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+ }
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+ }
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+ }else{
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+ if(this_index==1){
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+ myScroll.scrollTo(-this_pos_left+this_prev_width,0, _opt.clickScrollTime);
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+ }else if(this_index==_obj_li.length-1){
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+ if(this_off_right-_wrapper_off_right>1||this_off_right-_wrapper_off_right<-1){
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+ myScroll.scrollBy(this_off_right-_wrapper_off_right,0, _opt.clickScrollTime);
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+ }
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+ }else{
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+ if(this_off_left-_wrapper_off_left<duibi){
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+ myScroll.scrollTo(-this_pos_left+this_prev_width,0, _opt.clickScrollTime);
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+ }else if(this_off_right-_wrapper_off_right<duibi){
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+ myScroll.scrollBy(this_off_right-this_next_width-_wrapper_off_right,0, _opt.clickScrollTime);
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+ }
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+ }
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+ }
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+ }
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+ $this_obj.addClass(_opt.className).siblings('li').removeClass(_opt.className);
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+ _opt.endClickScroll.call(this,$this_obj);
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+ }
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+ });
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+ };
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+})(jQuery);
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