code: function(_id,_clazz,_event){
              var _point = _cache[_id];
              if (_point===-1) return;
              var _xy = _v._$page(_event),
                  _dx = Math.abs(_xy.x-_point.x),
                  _dy = Math.abs(_xy.y-_point.y);
              if (_dx>_distance||_dy>_distance){
                  _doTouchEnd(_id,_clazz);
              }
          }
docs: touchmove event