用于扩展单元格的自定义表格单元格行大小 - 不符合所需高度

Question

我一直在尝试实现一个视图，其中有一个表，单击时应该展开列。 我确实改变了heightForRowAtIndexPath方法以返回我想要的高度。我确实放了调试指针并检查了返回的内容，我的逻辑是否正常。在这种情况下，它返回44（我想要的）和100，如果我点击一个单元格。那很好。但在模拟器中，所有单元格都是100高度，但heightForRowAtIndexPath从未为任何单元格返回该值。 我已经花了几天但没有结果。

这里有什么问题？

如何解决？ 我的视图控制器代码

    #import "TableViewControllerTest.h"
#import "ExpandingCell.h"
@interface TableViewControllerTest ()

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

@end

@implementation TableViewControllerTest

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.tableView.delegate = self;
    self.tableView.dataSource = self;
    selectedIndex = -1;
    titleArray = [[NSMutableArray alloc] init];
    NSString *string;
    for(int i=1 ; i<=8; i++){
        string = [[NSString alloc] initWithFormat:@"Row %i",i];
        [titleArray addObject:string];
    }
    subtitleArray = [[NSArray alloc] initWithObjects:@"First Row", @"Second Row",@"Third Row",@"Fourth Row",@"Fifth Row",@"Sixth Row",@"Seventh Row",@"Eighth Row",nil];
    textArray  = [[NSArray alloc] initWithObjects:@"Apple",@"Orange",@"Banana",@"Grape",@"blueberry",@"Lemon",@"Lime",@"Peach", nil];

}

-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
    return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return titleArray.count;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath  {
    static NSString *cellIdentifier = @"expandingCell";
    ExpandingCell *cell = (ExpandingCell *)[tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    if(cell == nil){
        NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"ExpandingCell" owner:self options:nil];
        cell = [nib objectAtIndex:0];
    }
    if(selectedIndex == indexPath.row){
        cell.contentView.backgroundColor = [UIColor lightGrayColor];
        cell.textLable.textColor = [UIColor whiteColor];
        cell.titleLabel.font = [UIFont fontWithName:@"HelveticaNeue-Bold" size:18];
        cell.titleLabel.textColor = [UIColor whiteColor];
        cell.subtitleLabel.textColor = [UIColor whiteColor];
        cell.calcLabel.textColor = [UIColor whiteColor];
        cell.calculationLabel.textColor = [UIColor whiteColor];
        cell.fruitLabel.textColor = [UIColor whiteColor];

    }
    else{
        cell.contentView.backgroundColor = [UIColor whiteColor];
        cell.textLable.textColor = [UIColor blackColor];
        cell.titleLabel.font = [UIFont systemFontOfSize:17];
        cell.titleLabel.textColor = [UIColor blackColor];
        cell.subtitleLabel.textColor = [UIColor blackColor];
        cell.calcLabel.textColor = [UIColor blackColor];
        cell.calculationLabel.textColor = [UIColor blackColor];
        cell.fruitLabel.textColor = [UIColor blackColor];
    }
    cell.titleLabel.text = [titleArray objectAtIndex:indexPath.row];
    cell.subtitleLabel.text = [subtitleArray objectAtIndex:indexPath.row];
    cell.textLable.text = [textArray objectAtIndex:indexPath.row];
    int calculation = (int)(indexPath.row +1) * 25;
    cell.calculationLabel.text = [NSString stringWithFormat:@"%i",calculation];

    return cell;
}

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    if (selectedIndex == indexPath.row) {
        return 100;
    }
    else{
        return 44;
    }
}
-(void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath{
    if(selectedIndex == indexPath.row){
        selectedIndex = -1;
        [tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
    }
    if(selectedIndex != -1){
        NSIndexPath *prevPath = [NSIndexPath indexPathForRow:selectedIndex inSection:0];
        selectedIndex = (int)indexPath.row;
        [tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:prevPath] withRowAnimation:UITableViewRowAnimationFade];

    }

    selectedIndex = (int)indexPath.row;
    [tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}