EGORefreshTableHeaderView学习

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。 实现EGORefreshTableHeaderDelegate类

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;  

4、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];  

5、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  
       
}