CustomTableCell中的UICollectionView

Question

在尝试使用tableView中的自定义单元格中的自定义单元格实现UICollectionView时遇到了一些问题。 我有自定义表格视图单元格工作正常，显示我想要的标签。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath {
    TemperatureTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath: indexPath];
    Node *node = [[Node alloc] init];
    if(_nodes != nil){
        node = [_nodes objectAtIndex:indexPath.row];
        if(_tempSensorsDictionary.count > 0){
            NSArray *allSensors = [_tempSensorsDictionary objectForKey:node.number];
            TemperatureSensor *ts = allSensors[0];
            if(node.name != nil && ![node.name  isEqual: @""]){
                cell.unitNameLabel.text = node.name;
            } else {
                cell.unitNameLabel.text = node.number;
            }
            cell.collection = [_tempSensorsDictionary objectForKey:node.number];
        }
    }
    return cell;
}

我已将CollectionView背景设置为灰色，我可以看到此“框”。所以我想我在我推出的TemperatureTaleViewCell类中正确初始化了CollectionView：

@implementation TemperatureTableViewCell
-(id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {

    if (!(self = [super initWithStyle:style reuseIdentifier:reuseIdentifier])) return nil;

    UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];
    flowLayout.sectionInset = UIEdgeInsetsMake(10, 10, 10, 10);
    [flowLayout setItemSize:CGSizeMake(50, 50)];
    [flowLayout setScrollDirection:UICollectionViewScrollDirectionHorizontal];
    self.collectionView = [[CollectionView alloc] initWithFrame: CGRectZero collectionViewLayout:flowLayout];
    [self.collectionView registerClass:[TemperatureItemCollectionViewCell class] forCellWithReuseIdentifier:@"TemperatureItemCollectionCell"];
    self.collectionView.showsHorizontalScrollIndicator = NO;
    self.collectionView.dataSource = self;
    self.collectionView.delegate = self;

    [self.collectionView reloadData];
    [self.contentView addSubview:self.collectionView];
    return self;
}
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
    return 2;
}

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {

    TemperatureItemCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"TemperatureItemCollectionCell" forIndexPath:indexPath];
    cell.tempValTempCollViewCell.text = @"21oC";
    cell.backgroundColor = [UIColor redColor];

    return cell;

}
@end

但是我的表视图看起来像这样：

我的代码有什么问题，错误的方向在哪里？

Answer 1

需要在tableview cellForRowAtIndexPath 方法中重新加载集合视图数据。

-(void)tableView:(UITableView *)tableView willDisplayCell:(CategoryCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
    [cell setCollectionViewDelegate:self indexPath:indexPath];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath {
    TemperatureTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath: indexPath];
    Node *node = [[Node alloc] init];
    if(_nodes != nil){
        node = [_nodes objectAtIndex:indexPath.row];
        if(_tempSensorsDictionary.count > 0){
            NSArray *allSensors = [_tempSensorsDictionary objectForKey:node.number];
            TemperatureSensor *ts = allSensors[0];
            if(node.name != nil && ![node.name  isEqual: @""]){
                cell.unitNameLabel.text = node.name;
            } else {
                cell.unitNameLabel.text = node.number;
            }
            cell.collection = [_tempSensorsDictionary objectForKey:node.number];

            //Reload collection view data
            [cell.collectionView reloadData];
        }
    }
    return cell;
}

使用表格视图initWithStyle方法的 awakeFromNib 方法。

- (void)awakeFromNib
{
    [super awakeFromNib];
    UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];
    flowLayout.sectionInset = UIEdgeInsetsMake(10, 10, 10, 10);
    [flowLayout setItemSize:CGSizeMake(50, 50)];
    [flowLayout setScrollDirection:UICollectionViewScrollDirectionHorizontal];
    self.collectionView = [[CollectionView alloc] initWithFrame: CGRectZero collectionViewLayout:flowLayout];
    [self.collectionView registerClass:[TemperatureItemCollectionViewCell class] forCellWithReuseIdentifier:@"TemperatureItemCollectionCell"];
    self.collectionView.showsHorizontalScrollIndicator = NO;
    self.collectionView.dataSource = self;
    self.collectionView.delegate = self;

    [self.contentView addSubview:self.collectionView];
}

在 TemperatureTaleViewCell 类

中设置集合视图的委托

- (void)setCollectionViewDelegate:(id)dataSourceDelegate indexPath:(NSIndexPath *)indexPath
{
    self.collectionView.delegate = dataSourceDelegate;
}

Answer 2

正如我所看到的，您通过XIB /故事板设计了TemperatureTaleViewCell，并通过

创建了单元格

  strcpy(oldnp, oldpath);
  strcat(oldnp, "/");
  strcat(oldnp, get_between_delimiter(commande[cnt] , 0));
  strcat(oldnp, ".png");
  source = fopen(oldnp, "r");
  if ((source = fopen(oldnp, "r")) == NULL)
   file_found();
  else
   ;?

到目前为止还可以，但是你在initWithStyle中设置了collectionView的委托和dataSource，在这种情况下不会调用它。因此，不会调用您的集合视图的委托和数据源方法。