iOS : refreshing already loaded tableView

Question

有没有一种“更短”的写法？似乎要获取玩家 ViewController 实例还有很长的路要走...

    UIWindow *window = [UIApplication sharedApplication].keyWindow;
    UITabBarController *tabBarController = (UITabBarController *)window.rootViewController;
    UINavigationController *navigationController = [[tabBarController viewControllers] objectAtIndex:0];
    PlayersViewController *playersViewController = [[navigationController viewControllers] objectAtIndex:0];
    [playersViewController.tableView performSelectorOnMainThread:@selector(reloadData) withObject:nil waitUntilDone:NO];

我正在刷新已加载的 tableView

#pragma mark - RatePlayerViewControllerDelegate
- (void)ratePlayerViewController: (RatePlayerViewController *)controller didPickRatingForPlayer:(Player *)player
{
    if (player.rating != self.requiredRating)
    {
    // do stuff.. in self.tableView
    // refresh players tableView

Answer 1

你可以使用通知

PlayersViewController.m

在你的初始化方法中添加这一行:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reloadPlayers:) name:@"reloadPlayersNotification" object:nil];

并实现方法

- (void)reloadPlayers:(NSNotification *)notification {
    [self.tableView reloadData];
}

当您的 tableView 不能接收 reloadData 调用时(例如，如果 tableView 不可见)，请记住移除您的观察者

[[NSNotificationCenter defaultCenter] removeObserver:self name@"reloadPlayersNotification" object:nil]

现在如果你想从另一个类重新加载这个 tableView :

[[NSNotificationCenter defaultCenter] postNotification:@"reloadPlayersNotification"];