ios - 如何使用警报 View 刷新 uitableivew？

Question

在 .h 文件中:

@property (weak, nonatomic) IBOutlet UITableView *tableView;

在 .m 文件中:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *simpleTableIdentifier = @"RememberedTableListCell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
    }

    cell.textLabel.text = [[listItems objectAtIndex:indexPath.row] objectForKey:@"word"];
    return cell;
}

- (IBAction)resetList:(UIBarButtonItem *)sender {

    UIAlertView *resetAlert = [[UIAlertView alloc] initWithTitle:@"Reset" message:@"Are you sure to reset the list?" delegate:self cancelButtonTitle:@"No" otherButtonTitles:@"Yes", nil];
    [resetAlert show];

}

- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {

    // the user clicked Yes
    if (buttonIndex == 1) {
        // reset the list

        //reload table data
        NSLog(@"button yes is clicked");

        for (NSMutableDictionary*l in listAll) {
             [l setValue:@"0" forKey:@"remembered"];
        }

        [self.tableView reloadData];
        //[[NSOperationQueue mainQueue]addOperationWithBlock:^{[self.tvRemembered reloadData];}];

        //[self.tableView reloadRowsAtIndexPaths:[self.tableView indexPathsForSelectedRows] withRowAnimation:UITableViewRowAnimationNone];


        NSLog(@"refreshing...");


    }

}

如何刷新 UITableView 与 UIAlertView 委托(delegate) ?我试过reloadData:和 reloadRowsAtIndexPaths:像上面一样。但他们没有帮助。任何帮助将不胜感激。

Answer 1

一段时间reloadData不工作，所以你需要reloadData有一些时间延迟，例如，

- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {

    // the user clicked Yes
    if (buttonIndex == 1) {
        [self performSelector:@selector(reloadTableData) withObject:self afterDelay:0.20]; // set afterDelay as per your requirement.
    }
}

在方法中

-(void)reloadTableData
{
    [self.tableView reloadData];
}

了解更多信息

https://developer.apple.com/library/ios/documentation/uikit/reference/UITableView_Class/Reference/Reference.html#//apple_ref/occ/instm/UITableView/reloadData