IOS控件 Tableview 下拉刷新，加载数据

一、 点击此连链接下载资源文件，将

EGORefreshTableHeaderView.h

、

EGORefreshTableHeaderView.m

两个文件，以及Enormego提供的那一套图片包拖进你的工程里。

二、找到你的 UITableViewController 的 .h 文件，添加相应的代码：

#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

三、切换到你的 UITableViewController 的 .m 文件，添加相应的代码：

1 - (void)viewDidLoad {
2 [super viewDidLoad];
3
4 if (_refreshHeaderView == nil) {
5
6 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)];
7 view.delegate = self;
8 [self.tableView addSubview:view];
9 _refreshHeaderView = view;
10 [view release];
11
12 }
13
14 //  update the last update date
15 [_refreshHeaderView refreshLastUpdatedDate];
16 }

1 #pragma mark -
2 #pragma mark Data Source Loading / Reloading Methods
3
4 - (void)reloadTableViewDataSource{
5
6 //  should be calling your tableviews data source model to reload
7 //  put here just for demo
8 _reloading = YES;
9
10 }
11
12 - (void)doneLoadingTableViewData{
13
14 //  model should call this when its done loading
15 _reloading = NO;
16 [_refreshHeaderView egoRefreshScrollViewDataSourceDidFinishedLoading:self.tableView];
17
18 }
19
20 #pragma mark -
21 #pragma mark UIScrollViewDelegate Methods
22
23 - (void)scrollViewDidScroll:(UIScrollView *)scrollView{
24
25 [_refreshHeaderView egoRefreshScrollViewDidScroll:scrollView];
26
27 }
28
29 - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate{
30
31 [_refreshHeaderView egoRefreshScrollViewDidEndDragging:scrollView];
32
33 }
34
35 #pragma mark -
36 #pragma mark EGORefreshTableHeaderDelegate Methods
37
38 - (void)egoRefreshTableHeaderDidTriggerRefresh:(EGORefreshTableHeaderView*)view{
39
40 [self reloadTableViewDataSource];
41 [self performSelector:@selector(doneLoadingTableViewData) withObject:nil afterDelay:3.0];
42
43 }
44
45 - (BOOL)egoRefreshTableHeaderDataSourceIsLoading:(EGORefreshTableHeaderView*)view{
46
47 return _reloading; // should return if data source model is reloading
48
49 }
50
51 - (NSDate*)egoRefreshTableHeaderDataSourceLastUpdated:(EGORefreshTableHeaderView*)view{
52
53 return [NSDate date]; // should return date data source was last changed
54
55 }

四、最后呢，别忘了内存管理习惯，如果是ARC管理则可以不用dealloc。如果是MRC的话，就把下面的那个全部内存释放写上：

1 - (void)viewDidUnload {
2 _refreshHeaderView=nil;
3 }
4
5 - (void)dealloc {
6
7 _refreshHeaderView = nil;
8 [super dealloc];
9 }