适用于iOS6之后的苹果提供的下拉刷新

一：iOS6.0及以后：

• 下拉刷新控件UIRefreshControl
• TableView属性：refreshControl

二：使用

 - (void)colseTheTB
 {
     [self dismissViewControllerAnimated:YES completion:nil];
 }

 - (void)viewDidLoad
 {
     [super viewDidLoad];

     self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonItemStylePlain target:self action:@selector(colseTheTB)];

     //数据源
     self.dataArray = [[NSMutableArray alloc]initWithCapacity:];
     for (int i = ; i < ; i ++) {
         [_dataArray addObject:[NSString stringWithFormat:@"%d",i]];
     }

     //适用于 iOS6 之后，系统自带的下拉刷新控件 UIRefreshControl
     UIRefreshControl *osRefresh = [[UIRefreshControl alloc]init];
     osRefresh.tintColor = [UIColor lightGrayColor];
     osRefresh.attributedTitle = [[NSAttributedString alloc]initWithString:@"下拉刷新"];
     [osRefresh addTarget:self action:@selector(doPullRefresh:) forControlEvents:UIControlEventValueChanged];
     self.refreshControl = osRefresh;

 }

 - (void)doPullRefresh:(UIRefreshControl *)refresh
 {
     if (refresh.refreshing) {
         refresh.attributedTitle = [[NSAttributedString alloc]initWithString:@"正在刷新"];
         [self performSelector:@selector(handleTheRefresh) withObject:nil afterDelay:];
     }

     else
     {
         refresh.attributedTitle = [[NSAttributedString alloc]initWithString:@"释放刷新"];

     }
 }

 - (void)handleTheRefresh
 {
     NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
     [formatter setDateFormat:@"MMM d, h:mm:ss a"];
     NSString *lastUpdated = [NSString stringWithFormat:@"时间:%@", [formatter stringFromDate:[NSDate date]]];
     self.refreshControl.attributedTitle = [[NSAttributedString alloc] initWithString:lastUpdated] ;

     static int num = ;
     num--;
     [_dataArray insertObject:[NSString stringWithFormat:@"%d",num] atIndex:];

     [self.refreshControl endRefreshing];
     [self.tableView reloadData];
 }

三：显示情况

• 在iOS6上显示情况，请参见 qq for iPhone版本 app
• 在iOS7 显示情况，是菊花动画，一片一片的铺满