显示刷新结果的label总是跟着最上方的那个cell动，请问怎么设置才能让这个label固定在navigationitem后面，等label需要时再出来
- (void)viewDidLoad {
[super viewDidLoad];
self.navigationItem.title = @"通知公告";
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addAnnouce)];
self.tableView.showsVerticalScrollIndicator = NO;
self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
self.tableView.backgroundColor = [UIColor colorWithRed:240.0 / 255.0 green:240.0 / 255.0 blue:240.0 / 255.0 alpha:1];
UILabel *tipLabel = [[UILabel alloc] initWithFrame:CGRectMake(0,0, SCREEN_WIDTH, 40)];
tipLabel.textAlignment = NSTextAlignmentCenter;
tipLabel.backgroundColor = RGBCOLOR(250.0f, 250.0f, 250.0f);
tipLabel.textColor = MAINCOLOR;
tipLabel.font = [UIFont systemFontOfSize:15];
[self.tableView addSubview:tipLabel];
self.tipLabel = tipLabel;
UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
self.refreshControl = refreshControl;
[refreshControl addTarget:self action:@selector(reloadData:) forControlEvents:UIControlEventValueChanged];
refreshControl.tintColor = MAINCOLOR;
[refreshControl beginRefreshing];
[self reloadData:refreshControl];
}
代码是tableview视图的viewdidload方法，这个设置刷新的label总是会跟着cell...
