Question

当我尝试在请求的成功块中删除 UITableViewCell 时出现问题。

在我的

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath

我正在向AFNetworking提出请求

- (NSURLSessionDataTask *)POST:(NSString *)URLString
                    parameters:(id)parameters
                       success:(void (^)(NSURLSessionDataTask *task, id responseObject))success
                       failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure

之后在成功阻止我通过解雇SVProgressHUD并删除单元格来更新UI：

NSUserDefaults *usd = [NSUserDefaults standardUserDefaults];
[usd removeObjectForKey:@"payViaCreditCard"];
selectedCardID = nil;

[[CreditCardManager sharedCreditCardManager] removeCreditCard:creditCardToDelete];
[self.tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
[self.tableView reloadData];

最后我的UI没有更新，应用程序冻结，当我重新启动应用程序时，NSUserDefaults中的数据发生了变化。

Answer 1

如果您执行deleteRowsAtIndexPaths:withRowAnimation或tableView reloadData，那就太好了。

    [[CreditCardManager sharedCreditCardManager] removeCreditCard:creditCardToDelete];
    [self.tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];

    OR 

    [[CreditCardManager sharedCreditCardManager] removeCreditCard:creditCardToDelete];
    [self.tableView reloadData];

Answer 2

要删除单元格，您应该使用

- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
   return UITableViewCellEditingStyleDelete; 
} 

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath 
{
   if (editingStyle == UITableViewCellEditingStyleDelete) 
   {
      NSUserDefaults *usd = [NSUserDefaults standardUserDefaults];
      [usd removeObjectForKey:@"payViaCreditCard"];
      selectedCardID = nil;

      [[CreditCardManager sharedCreditCardManager] removeCreditCard:creditCardToDelete];
      [self.tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
      //[self.tableView reloadData];
    }
}

应用程序在删除UITableViewCell后冻结

2 个答案: