哈04-xcode系统自带的刷新控件UIRefreshControl

要使用该控件首先必须继承 UITableViewController

1、初始化控件

- (id)initWithStyle:(UITableViewStyle)style

{

self = [super
initWithStyle:style];

if (self) {

UIRefreshControl *fresh=[[UIRefreshControl
alloc]init];

[fresh addTarget:self
action:@selector(freshAction:)
forControlEvents:UIControlEventValueChanged];

fresh.attributedTitle=[[NSMutableAttributedString
alloc]initWithString:@"下拉刷新"];

self.refreshControl=fresh;

[fresh release];

}

return
self;

}
2、添加事件模拟多线程请求

-(void)freshAction:(UIRefreshControl*)aRefresh

{

self.refreshControl.attributedTitle=[[NSMutableAttributedString
alloc]initWithString:@"加载中..."];

[self.refreshControl
beginRefreshing];

//模拟多线程请求

[self
performSelectorInBackground:@selector(requestData:)
withObject:nil];

}

3、发送请求

-(void)requestData:(id)sender

{

sleep(1);

[self
performSelectorOnMainThread:@selector(reloadUI)
withObject:nil
waitUntilDone:NO];

}

-(void)reloadUI

{

self.refreshControl.attributedTitle=[[[NSMutableAttributedString
alloc]initWithString:@"下拉可以刷新"]autorelease];

[self.refreshControl
endRefreshing];

[self.tableView
reloadData];

}

就以上几个步骤