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