UICollectionView不显示所有部分

Question

我正在使用UICollectionView并使用RFQuiltLayout库。我正在动态分配numberOfSectionsInCollectionView和numberOfItemsInSection。现在，17个部分被分配到集合视图。但显示它时只显示一个部分。

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
   cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"tableCell" forIndexPath:indexPath];
 UILabel* label = (id)[cell viewWithTag:21];
    if(!label) label=[[UILabel alloc] initWithFrame:CGRectMake(2, 0, cell.frame.size.width-4, cell.frame.size.height)];

    label.backgroundColor=[UIColor grayColor];
    label.tag=21;
    label.textColor=[UIColor blackColor];
    label.textAlignment = NSTextAlignmentCenter;
    label.numberOfLines = 2;
    [label setFont:[UIFont fontWithName:@"HelveticaNeue" size:11]];
    [cell.contentView addSubview:label];
     NSLog(@"total section assigned %ld",(long)collectionView.numberOfSections);
    NSLog(@"current section %ld",(long)indexPath.section);
    if (indexPath.section == 0) {
       if (indexPath.row == 0) {
           label.text = @"Category";
           [label setFont:[UIFont fontWithName:@"HelveticaNeue-Bold" size:11]];
            label.backgroundColor = [UIColor colorWithRed:127/255.f green:151/255.f blue:201/255.f alpha:1];
        }else if (indexPath.row == 1) {
            label.text = @"Current";
            [label setFont:[UIFont fontWithName:@"HelveticaNeue-Bold" size:11]];
            label.backgroundColor = [UIColor colorWithRed:255/255.f green:176/255.f blue:142/255.f alpha:1];
        }
   }else {
        CrimeAnalysisTable *aTable = [self.tableDataArray objectAtIndex:indexPath.section - 1];

        if (indexPath.row  == 0) {
            label.text = aTable.category;
   }
    }
    [cell setAutoresizesSubviews:YES];
    cell.backgroundColor=[UIColor whiteColor];
}
[cell setNeedsLayout];

return cell;
}

我使用上面的代码显示部分，但代码不在else部分

部分数量的NSLog正在打印17，而当前部分正在打印0。但计数不会超过0。