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);
        }
    }
}