关于这个内容，网上找到一篇相关内容，介绍的比较详细,转载网址：UITableView下拉刷新页面的实现 http://wangjun.easymorse.com/?p=1193 。该文章中还有EGORefreshTableHeaderView的链接，该开源框架是:https://github.com/enormego/EGOTableViewPullRefresh。
便于自己以后多次学习查看，特把具体内容转载过来：
下图是实现的效果图,当用户下拉列表的时候,就出现向上的箭头.
实现的开源框架是:https://github.com/enormego/EGOTableViewPullRefresh
实现过程很简单,下载相应的demo,然后拷贝资源文件和EGORefreshTableHeaderView.h和EGORefreshTableHeaderView.m到相依的工程中.在table所在的类中添加如下代码:
#import <UIKit/UIKit.h>
#import "EGORefreshTableHeaderView.h"
@interface iphone_navtaViewController : UIViewController <UITableViewDelegate,UITableViewDataSource,EGORefreshTableHeaderDelegate>
{
BOOL isflage;
IBOutlet UITableView *myTableView;
EGORefreshTableHeaderView *_refreshHeaderView;
BOOL _reloading;
}
@property (nonatomic,retain) UITableView *myTableView;
- (void)reloadTableViewDataSource;
- (void)doneLoadingTableViewData;
@end
实现方法：
#import "iphone_navtaViewController.h"
@implementation iphone_navtaViewController
@synthesize myTableView;
- (void)viewDidLoad
{
[super viewDidLoad];
if (_refreshHeaderView == nil) {
EGORefreshTableHeaderView *view1 = [[EGORefreshTableHeaderView alloc] initWithFrame:CGRectMake(0.0f, 10.0f – self.myTableView.bounds.size.height, self.myTableView.frame.size.width, self.view.bounds.size.height)];
view1.delegate = self;
[self.myTableView addSubview:view1];
_refreshHeaderView = view1;
[view1 release];
}
[_refreshHeaderView refreshLastUpdatedDate];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
- (void)viewDidUnload {
self.myTableView=nil;
_refreshHeaderView=nil;
}
- (void)dealloc
{
[_refreshHeaderView release];
[self.myTableView release];
[super dealloc];
}
#pragma mark – #pragma mark Data Source Loading / Reloading Methods
- (void)reloadTableViewDataSource{
NSLog(@"==开始加载数据");
_reloading = YES;
}
- (void)doneLoadingTableViewData{
NSLog(@"===加载完数据");
_reloading = NO;
[_refreshHeaderView egoRefreshScrollViewDataSourceDidFinishedLoading:self.myTableView];
}
#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;
}
- (NSDate*)egoRefreshTableHeaderDataSourceLastUpdated:(EGORefreshTableHeaderView*)view{
return [NSDate date];
}
@end
一个最重要的步骤，就是要添加QuartzCore.framework组建。
然后运行即可。
