RayPullToRefresh

self.tableView.refresh(RayTableViewAnimateType.Default) { () -> () in
            self.delay(2.0, closure: { () -> () in
                self.size = 1;
                self.tableView.reloadData();
                self.tableView.completeDragRefresh();
            })
        }

 self.tableView.more { () -> () in
            self.delay(2.0, closure: { () -> () in
                print("上啦加载更多...");
                self.size = self.size + 1;
                self.tableView.reloadData();
                self.tableView.completeDragMore();
            })
        }

override func setState(newsState: RayHeadViewState) {
        self.state = newsState;
        switch(self.state){
        case RayHeadViewState.StateDragToRefresh: //下拉刷新
            break;
        case RayHeadViewState.StateLooseToRefresh://松开刷新
            break;
        case RayHeadViewState.StateRefreshing://刷新中
            break;
        case RayHeadViewState.StateDraging: //滑动中
            break;
        }

    }