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
@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 ];
}
[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
}
#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 ];
}
_refreshHeaderView = nil;
}
- ( void )dealloc {
_refreshHeaderView = nil;
[super dealloc ];
}
四、编译之前,别忘了将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。