Question

我有一个UITableView和sqlite数据库。 textLabel和detailTextLabel以及图像来自db。当我删除一行然后添加一行（添加到'array'然后'reloadData'）时，'textLabel'获取旧数据。我在日志中看到的是正确的数据应该在标签中，但旧数据在标签中。我检查了数据来自db，一切都是正确的。

我的代码：

ADD GROUP：

NSString *userID = [NSString stringWithFormat:@"%i",[[NSUserDefaults standardUserDefaults] integerForKey:@"userID"]];
            NSString *groupName = [alertView textFieldAtIndex:0].text;
            NSString *mobile = [[NSUserDefaults standardUserDefaults] objectForKey:@"userPhoneNumber"];

            NSMutableDictionary *parameters = [[NSMutableDictionary alloc] init];
            [parameters setObject:userID forKey:@"userID"];
            [parameters setObject:groupName forKey:@"groupName"];
            [parameters setObject:mobile forKey:@"mobile"];

            @try {
                NSString *responseXML = HTTP_POST(WEB_SERVICES_URL, @"addGroup", parameters);
                NSLog(@"\nResponse XML (addGroup):\n%@\n", responseXML);

                Group *aGroup = [[Group alloc] init];
                aGroup.groupID = [[IDAN_XML_Parser sharedInstance] getResponseFor:@"answer" inXML:responseXML].integerValue;
                aGroup.visible = kTrue;
                aGroup.manager = [[NSUserDefaults standardUserDefaults] integerForKey:@"userID"];
                aGroup.name = groupName;
                aGroup.time = [[MobileControlHandler sharedInstance] getFormattedDate];

                [[SQLiteHandler sharedDatabase] addGroup:aGroup];
                [CoreDataHandler getGroups];
                [SVProgressHUD dismiss];
                listOfGroups = [[NSMutableArray alloc] init];
                listOfGroups = [[SQLiteHandler sharedDatabase] getAllGroups];
                [tableGroup reloadData];
            }
            @catch (NSException *exception) {
                NSLog(@"addGroup Exception: %@", exception.reason);
            }
            @finally {}

删除行：

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (editingStyle == UITableViewCellEditingStyleDelete) {

        UIActivityIndicatorView *indicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
        indicator.center = self.view.center;
        [indicator startAnimating];
        [tableView beginUpdates];

        @try {
            Group *aGroup = listOfGroups[indexPath.row];
            NSMutableArray *allMembersInGroup = [[SQLiteHandler sharedDatabase] getAllMembersInGroupID:aGroup.groupID];
            NSString *membersIDs = @"";
            printf("allMembersInGroup.count: %i\n", allMembersInGroup.count);

            if (allMembersInGroup.count > 0) {
                for (int i = 0; i < allMembersInGroup.count; i++) {
                    GroupMember *aGroupMember = allMembersInGroup[i];
                    membersIDs = [membersIDs stringByAppendingString:[NSString stringWithFormat:@"%i,", aGroupMember.memberID]];
                }
                membersIDs = [membersIDs substringToIndex:membersIDs.length - 1];

                [CoreDataHandler deleteGroupMemberID:membersIDs inGroupID:[NSString stringWithFormat:@"%i", aGroup.groupID]];
            }

            [CoreDataHandler getGroups];
            [tableView endUpdates];
            [tableView setEditing:NO animated:YES];
            listOfGroups = [[SQLiteHandler sharedDatabase] getAllGroups];
            [tableView reloadData];
            [tableView setNeedsLayout];
            [SVProgressHUD dismiss];
            [indicator stopAnimating];
            indicator.hidden = YES;
        }
        @catch (NSException *exception) {
            NSLog(@"commitEditingStyle:forRowAtIndexPath:%i, Exception: %@", indexPath.row, exception.reason);
            [SVProgressHUD dismiss];
            [indicator stopAnimating];
            indicator.hidden = YES;
        }
        @finally {}
    }
}

这就是我配置单元格的方式：

- (UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

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

    UILabel *textLabel = (UILabel*)[cell.contentView viewWithTag:31];
    UILabel *detailTextLabel = (UILabel*)[cell viewWithTag:32];


    Group *newGroup = listOfGroups[indexPath.row];
    cell.backgroundColor = darkGrayColor();

    textLabel.text = newGroup.name;
    NSLog(@"newGroup.name: %@, textLabel.text: %@", newGroup.name, textLabel.text);
    textLabel.font = [UIFont fontWithName:kFontNameBold size:kFontSizeBig];
    textLabel.tag = kTagLabelGroupName;
    textLabel.backgroundColor = [UIColor clearColor];
    textLabel.textAlignment = NSTextAlignmentRight;
    textLabel.textColor = [UIColor whiteColor];

    detailTextLabel.font = [UIFont fontWithName:kFontName size:kFontSize];
    detailTextLabel.text = newGroup.time;
    detailTextLabel.textColor = [UIColor whiteColor];
    detailTextLabel.tag = kTagLabelGroupDate;
    detailTextLabel.backgroundColor = [UIColor clearColor];
    detailTextLabel.textAlignment = NSTextAlignmentRight;

    //    cell.imageView.image = self.imageGroup.image;
    cell.imageView.layer.cornerRadius = 25;
    cell.imageView.layer.borderWidth = 0;
    cell.imageView.layer.borderColor = (__bridge CGColorRef)([UIColor clearColor]);
    cell.imageView.clipsToBounds = YES;


    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        UIImage *image = [CoreDataHandler decodeImageFromBase64:newGroup.picture];

        dispatch_async(dispatch_get_main_queue(), ^{
            cell.imageView.image = [CoreDataHandler imageWithImage:image scaledToSize:CGSizeMake(50, 50)];
            [cell setNeedsLayout];
        });
    });


    /* UIImageView *imageGroupManager = [[UIImageView alloc] initWithFrame:CGRectMake(40, 40, 25, 25)];
     imageGroupManager.image = [UIImage imageNamed:@"star.png"];
     imageGroupManager.tag = kTagPictureStar;

     if (newGroup.manager == [[NSUserDefaults standardUserDefaults] integerForKey:@"userID"]) {
     [cell insertSubview:imageGroupManager aboveSubview:cell.imageView];
     } */

    return cell;
}

修改

我将自制的textLabel更改为cell.textLabel并且一切顺利，但问题是我无法更改文本方向，可能将其更改为自定义单元格应该没问题。

Answer 1

尝试改变：

原始代码：

[CoreDataHandler getGroups];
[tableView endUpdates];
[tableView setEditing:NO animated:YES];
listOfGroups = [[SQLiteHandler sharedDatabase] getAllGroups];
[tableView reloadData];
[tableView setNeedsLayout];
[SVProgressHUD dismiss];
[indicator stopAnimating];
indicator.hidden = YES;

更改了代码：

[CoreDataHandler getGroups];
listOfGroups = [[SQLiteHandler sharedDatabase] getAllGroups];
[tableView setEditing:NO animated:YES];
[tableView endUpdates];
[SVProgressHUD dismiss];
[indicator stopAnimating];
indicator.hidden = YES;

Answer 2

UITableViewCell的子类化解决了我的问题。

在sqlite db中更改后的'reloadData'时，cell.textLabel中的旧数据

2 个答案: