ios - 滚动后 tableview 中的数据混淆

Question

我已经阅读了很多问题并尝试了解决方案，但我仍然无法用我的 tableview 解决问题。

滚动后，tableview 的行中的数据会互换，有时会丢失。

这是我的代码:

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

    BGMModifierCheckCell *cell = nil;
    cell = (BGMModifierCheckCell *)[tableView dequeueReusableCellWithIdentifier:modifierCheckCell];

    if (cell == nil) {

        NSArray* topLevelObjects = [[NSBundle mainBundle] loadNibNamed:modifierCheckCell owner:self options:nil];
        for (id currentObject in topLevelObjects) {
            if ([currentObject isKindOfClass:[UITableViewCell class]]) {
                cell = (BGMModifierCheckCell *)currentObject;
                break;
            }
        }


        cell.selectionStyle = UITableViewCellSelectionStyleNone;

        NSArray *optionIds = [[[arrayInsideDict objectAtIndex:indexPath.section] objectForKey:@"optnItem"] objectAtIndex:indexPath.row];

        BGMOptnCats *optnCat = [BGMOptnCats MR_findFirstByAttribute:@"iOptnCatId" withValue:[[arrayInsideDict objectAtIndex:indexPath.section] objectForKey:@"optnCatId"]];

        [optionIds enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {

            __block int optnTag = [obj intValue];

            BGMItemDayOptns *item = [BGMItemDayOptns MR_findFirstByAttribute:@"iItemDayOptnId" withValue:obj];

            [item.optns.optnLangs enumerateObjectsUsingBlock:^(id obj, BOOL *stop) {

                BGMOptnLangs *lang = (BGMOptnLangs *)obj;

                if ([lang.sLangCode isEqualToString:@"en"]) {

                    NSString *optn = [NSString stringWithFormat:@"%@", lang.sOptnName];

                    if ([optnCat.sOptnType isEqualToString:@"single"]) {

                        RadioButton *rb1                   = [[RadioButton alloc] initWithFrame:CGRectMake(0, 0, 200, 40)];
                        [rb1 setGroupID:indexPath.section AndID:optnTag AndTitle:optn];
                        rb1.delegate                    = self;

                        if (idx == 0) {

                            [cell.firstOption addSubview:rb1];

                        } else if (idx == 1) {

                            [cell.secondOption addSubview:rb1];

                        } else if (idx == 2) {

                            [cell.thirdOption addSubview:rb1];

                        }


                    } else if ([optnCat.sOptnType isEqualToString:@"multiple"]) {

                        SSCheckBoxView *checkBox = [[SSCheckBoxView alloc] initWithFrame:CGRectMake(0, 0, 200, 40) style:kSSCheckBoxViewStyleMono checked:NO];
                        checkBox.tag = optnTag;
                        [checkBox setStateChangedTarget:self selector:@selector(checkBoxViewChangedState:)];
                        [checkBox setText:@""];
                        [checkBox setText:optn];

                        if (idx == 0) {

                            [cell.firstOption addSubview:checkBox];

                        } else if (idx == 1) {

                            [cell.secondOption addSubview:checkBox];

                        } else if (idx == 2) {

                            [cell.thirdOption addSubview:checkBox];

                        }


                    }

                }

            }];

        }];

    }

    return cell;

}

Answer 1

问题是您的细胞正在被重复使用。所以滚动时行会互换。

在 if (cell == nil) 之外设置单元格内容。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{    static NSString *modifierCheckCell = @"BGMModifierCheckCell";    BGMModifierCheckCell *cell = nil;    cell = (BGMModifierCheckCell *)[tableView dequeueReusableCellWithIdentifier:modifierCheckCell];    if (cell == nil) {        NSArray* topLevelObjects = [[NSBundle mainBundle] loadNibNamed:modifierCheckCell owner:self options:nil];        for (id currentObject in topLevelObjects) {            if ([currentObject isKindOfClass:[UITableViewCell class]]) {                cell = (BGMModifierCheckCell *)currentObject;                break;            }        }     }        cell.selectionStyle = UITableViewCellSelectionStyleNone;        NSArray *optionIds = [[[arrayInsideDict objectAtIndex:indexPath.section] objectForKey:@"optnItem"] objectAtIndex:indexPath.row];        BGMOptnCats *optnCat = [BGMOptnCats MR_findFirstByAttribute:@"iOptnCatId" withValue:[[arrayInsideDict objectAtIndex:indexPath.section] objectForKey:@"optnCatId"]];        [optionIds enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {            __block int optnTag = [obj intValue];            BGMItemDayOptns *item = [BGMItemDayOptns MR_findFirstByAttribute:@"iItemDayOptnId" withValue:obj];            [item.optns.optnLangs enumerateObjectsUsingBlock:^(id obj, BOOL *stop) {                BGMOptnLangs *lang = (BGMOptnLangs *)obj;                if ([lang.sLangCode isEqualToString:@"en"]) {                    NSString *optn = [NSString stringWithFormat:@"%@", lang.sOptnName];                    if ([optnCat.sOptnType isEqualToString:@"single"]) {                        RadioButton *rb1                   = [[RadioButton alloc] initWithFrame:CGRectMake(0, 0, 200, 40)];                        [rb1 setGroupID:indexPath.section AndID:optnTag AndTitle:optn];                        rb1.delegate                    = self;                        if (idx == 0) {                            [cell.firstOption addSubview:rb1];                        } else if (idx == 1) {                            [cell.secondOption addSubview:rb1];                        } else if (idx == 2) {                            [cell.thirdOption addSubview:rb1];                        }                    } else if ([optnCat.sOptnType isEqualToString:@"multiple"]) {                        SSCheckBoxView *checkBox = [[SSCheckBoxView alloc] initWithFrame:CGRectMake(0, 0, 200, 40) style:kSSCheckBoxViewStyleMono checked:NO];                        checkBox.tag = optnTag;                        [checkBox setStateChangedTarget:self selector:@selector(checkBoxViewChangedState:)];                        [checkBox setText:@""];                        [checkBox setText:optn];                        if (idx == 0) {                            [cell.firstOption addSubview:checkBox];                        } else if (idx == 1) {                            [cell.secondOption addSubview:checkBox];                        } else if (idx == 2) {                            [cell.thirdOption addSubview:checkBox];                        }                    }                }            }];        }];    return cell;}