MJRefresh上拉刷新下拉加载

1.创建  

//下拉刷新
    _headerView = [MJRefreshHeaderView header];
    _headerView.scrollView = _tbView;
    _headerView.delegate = self;
    
    //上拉加载更多
    _footerView = [MJRefreshFooterView footer];
    _footerView.scrollView = _tbView;
    _footerView.delegate = self;
    
    [_headerView beginRefreshing];

2.下载成功后停止下载

#pragma mark  -----MJRefreshBaseView代理
-(void)refreshViewBeginRefreshing:(MJRefreshBaseView *)refreshView
{
    if (_isLoading) {
        return;
    }
    if (refreshView == _headerView) {
        _curPage = 1;
        [self downloadData];
    }
    else if (refreshView == _footerView)
    {
        _curPage++;
        [self downloadData];
    }
}

        //修改下载状态
        _isLoading = NO;
        [_headerView endRefreshing];
        [_footerView endRefreshing];

3.释放

-(void)dealloc
{
    _headerView.scrollView = nil;
    _footerView.scrollView = nil;
}