ios 怎么刷新header里面的数据源
采用的EGORefreshTableHeaderView来实现:
在Controller上实现EGORefreshTableHeaderDelegate的delegate
@property(nonatomic)UITableView* tableView;
@property(nonatomic)NSMutableArray* data;
@property(nonatomic)EGORefreshTableHeaderView* refreshTableVIew;
@property(nonatomic,assign)BOOL reloading;
先初始化：
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
UIToolbar* bar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
UIBarButtonItem* item = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(click)];
[bar setItems:[NSArray arrayWithObjects:item, nil]];
[self.view addSubview:bar];
self.tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 44,320,460-44)];
[self.view addSubview:_tableView];
self.tableView.delegate = self;
self.tableView.dataSource = self;
_data = [[NSMutableArray alloc] init];
[_data addObject:@"aa"];
[_data addObject:@"cc"];
if (_refreshTableVIew == nil) {
EGORefreshTableHeaderView* refreshTableView = [[EGORefreshTableHeaderView alloc] initWithFrame:CGRectMake(0, -self.tableView.bounds.size.height, self.view.frame.size.width, self.tableView.bounds.size.height)];
refreshTableView.delegate = self;
[_tableView addSubview:refreshTableView];
_refreshTableVIew = refreshTableView;
}
}
下拉的时候会执行
- (void)egoRefreshTableHeaderDidTriggerRefresh:(EGORefreshTableHeaderView*)view{
_reloading = YES;
//开始刷新后执行后台线程，在此之前可以开启HUD或其他对UI进行阻塞
[NSThread detachNewThreadSelector:@selector(doInBackground) toTarget:self withObject:nil];
}
-(void)doInBackground{
NSLog(@"do in background");
[_data addObject:@"ff"];
[NSThread sleepForTimeInterval:3];
[self performSelectorOnMainThread:@selector(loadedTableViewData) withObject:nil waitUntilDone:YES];
}
-(void)loadedTableViewData{
_reloading = NO;
[_refreshTableVIew egoRefreshScrollViewDataSourceDidFinishedLoading:self.tableView];
[self.tableView reloadData];
}
这个方法表示正在刷新中
- (BOOL)egoRefreshTableHeaderDataSourceIsLoading:(EGORefreshTableHeaderView*)view{
return _reloading;
}
这个方法在显示时间在TableView的刷新块上 :
//返回刷新时间的回调方法
-(NSDate *)egoRefreshTableHeaderDataSourceLastUpdated:(EGORefreshTableHeaderView *)view
{
return [NSDate date];
}
然后必须加上下面两个方法:
-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
[_refreshTableVIew egoRefreshScrollViewDidScroll:scrollView];
}
-(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
{
[_refreshTableVIew egoRefreshScrollViewDidEndDragging:scrollView];
