mobile touch 备用

 var _scrollIndex=1;
 function scrollPage(){
     var _contentEle = $('.view-container'),_viewEle = _contentEle.find('.view');
     var _iconEle = $('.downIconArror');
     var _view_port = $('.view-port');
     var _touchEvents = {
         'pageYStart':'',
         'pageYEnd':'',
         'touchstart':function(event){
             event.preventDefault();
             var _touch = event.touches[0],_this = _touchEvents;
             _this.pageYStart = _touch.pageY;
             _view_port[0].addEventListener('touchmove',_this.touchmove,true);
             _view_port[0].addEventListener('touchend',_this.touchend,true);
         },
         'touchmove':function(event){
             event.preventDefault();
             var _touch = event.touches[0],_this = _touchEvents;
             _this.pageYEnd = _touch.pageY;
         },
         'touchend':function(event){
             var _this = _touchEvents;
             var _distance = _this.pageYEnd-_this.pageYStart;
             if(_distance>50){
                 swipe.down();
             }
             if(_distance<-50){
                 swipe.up();
             }
             _view_port[0].removeEventListener('touchmove',_this.touchmove);
             _view_port[0].removeEventListener('touchend',_this.touchend);
         }
     };
     _view_port[0].addEventListener('touchstart',_touchEvents.touchstart);
     var swipe = {
         up:function(){
             var _this = _contentEle;
             var _initTransY = getTransform(_this);
             if(Math.abs(_initTransY)==(_viewEle.length-1)*_viewEle.height()){
                 return;
             }
             if(Math.abs(_initTransY)==(_viewEle.length-2)*_viewEle.height()){
                 _iconEle.hide();
             }else{
                 _iconEle.show();
             }
             _scrollIndex++;
             scrollPageAnimate(_scrollIndex);
             _this.animate({'margin-top':parseInt(_initTransY-_viewEle.height())},500);
         },
         down:function(){
             var _this = _contentEle;
             var _initTransY = getTransform(_this);
             _iconEle.show();
             if(_initTransY==0){
                 return;
             }
             _scrollIndex--;
             scrollPageAnimate(_scrollIndex);
             _this.animate({'margin-top':parseInt(_initTransY+_viewEle.height())},500);
         }
     }
 }