tableview下拉刷新

1、下载EGORefreshTableHeaderView开源框架。

2、往应用中添加EGORefreshTableHeaderView.h文件、EGORefreshTableHeaderView.m文件、Resource目录，并且导入QuartzCore.framework

3、添加代码

 往tableview对应的类的头文件中添加如下代码 EGORefreshTableHeaderView *_refreshHeaderView;

     BOOL _reloading;

 - (void)reloadTableViewDataSource;
 - (void)doneLoadingTableViewData;

 往viewDidLoad函数里添加如下代码

 if (_refreshHeaderView == nil) {

         EGORefreshTableHeaderView *view = [[EGORefreshTableHeaderView alloc] initWithFrame:CGRectMake(0.0f, 0.0f - self.tableView.bounds.size.height, self.view.frame.size.width, self.tableView.bounds.size.height)];
         view.delegate = self;
         [self.tableView addSubview:view];
         _refreshHeaderView = view;
         [view release];

     }

     //  update the last update date
     [_refreshHeaderView refreshLastUpdatedDate];

  再添加一些事件函数

 #pragma mark -
 #pragma mark Data Source Loading / Reloading Methods

 - (void)reloadTableViewDataSource{

     //  should be calling your tableviews data source model to reload
     //  put here just for demo
     _reloading = YES;

 }

 - (void)doneLoadingTableViewData{

     //  model should call this when its done loading
     _reloading = NO;
     [_refreshHeaderView egoRefreshScrollViewDataSourceDidFinishedLoading:self.tableView];

 }

 #pragma mark -
 #pragma mark UIScrollViewDelegate Methods

 - (void)scrollViewDidScroll:(UIScrollView *)scrollView{

     [_refreshHeaderView egoRefreshScrollViewDidScroll:scrollView];

 }

 - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate{

     [_refreshHeaderView egoRefreshScrollViewDidEndDragging:scrollView];

 }

 #pragma mark -
 #pragma mark EGORefreshTableHeaderDelegate Methods

 - (void)egoRefreshTableHeaderDidTriggerRefresh:(EGORefreshTableHeaderView*)view{

     [self reloadTableViewDataSource];
     [self performSelector:@selector(doneLoadingTableViewData) withObject:nil afterDelay:3.0];

 }

 - (BOOL)egoRefreshTableHeaderDataSourceIsLoading:(EGORefreshTableHeaderView*)view{

     return _reloading; // should return if data source model is reloading

 }

 - (NSDate*)egoRefreshTableHeaderDataSourceLastUpdated:(EGORefreshTableHeaderView*)view{

     return [NSDate date]; // should return date data source was last changed

 }

 最后，自己配置数据源进行测试。