iOS开发>>>UITableView下拉刷新控件的使用

一、找到你的 UITableView / UITableViewController的 .h文件，结合以下代码，添加相应的元素：

 

#import "EGORefreshTableHeaderView.h"

@interface RootViewController : UITableViewController  {

EGORefreshTableHeaderView *_refreshHeaderView;

//  Reloading var should really be your tableviews datasource

//  Putting it here for demo purposes

BOOL _reloading;

}

-(void)reloadTableViewDataSource;

-(void)doneLoadingTableViewData;

@end

二、切换到你的 UITableView / UITableViewController的 .m文件，结合以下代码，添加相应的元素：

-(void)viewDidLoad {

[super viewDidLoad];

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];

}

 

#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

}

三、最后呢，为了彰显你良好的内存管理习惯，别忘了释放掉相应的 UI 元素：

 

-(void)viewDidUnload {

_refreshHeaderView=nil;

}

-(void)dealloc {

_refreshHeaderView =nil;

[super dealloc];

}