UICollectionView - 不要添加新的自定义单元格

Question

我在视图中有一个 collectionView。我确实设置了 hte 数据源、委托和一切。

这个单元正在工作：

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
    UICollectionViewCell *cell = [self.collectionAddedMembers dequeueReusableCellWithReuseIdentifier:cellReuseIdentifierAdded forIndexPath:indexPath];
    cell.backgroundColor = [colores objectAtIndex:arc4random_uniform(6)];
    return cell;
}

但在我的自定义单元格 AdditionalMemberCollectionViewCell 上，它不会添加新单元格：

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
    AddedMemberCollectionViewCell *cell = [self.collectionAddedMembers dequeueReusableCellWithReuseIdentifier:cellReuseIdentifierAdded forIndexPath:indexPath];
    NSArray *firstSection = [selectedMembersData objectAtIndex:0];
    SelectedContacto *cellData = [firstSection objectAtIndex:indexPath.row];
    NSMutableDictionary *dataForConfigure = [[NSMutableDictionary alloc] init];
    [dataForConfigure setObject:cellData.contactAvatar forKey:@"contactAvatar"];
    [dataForConfigure setObject:cellData.contactName forKey:@"contactName"];
    [dataForConfigure setObject:cellData.memberId forKey:@"contactName"];
    [cell configure:dataForConfigure];
    return cell;
}

这是自定义单元格的代码。

.h 文件：

@interface AddedMemberCollectionViewCell : UICollectionViewCell
@property (nonatomic) IBOutlet UIImageView *avatar;
@property (nonatomic) IBOutlet UILabel *memberName;
@property (nonatomic) IBOutlet UIButton *removeMember;
@property (nonatomic) NSNumber *memberId;
- (void) configure:(NSDictionary*)cellData;
@end

.m 文件

#import "AddedMemberCollectionViewCell.h"

@implementation AddedMemberCollectionViewCell
- (void) configure:(NSDictionary*)cellData {
    self.avatar = [cellData objectForKey:@"contactAvatar"];
    self.memberName = [cellData objectForKey:@"contactName"];
    self.memberId = [cellData objectForKey:@"memberId"];
}
@end

我可以提供更多代码，但我认为没有必要。这里发生了什么？

编辑：

在 viewDidLoad 中注册：

self.searchBar.delegate = self;
self.tableView.delegate = self;
self.tableView.dataSource = self;
self.collectionAddedMembers.dataSource = self;
self.collectionAddedMembers.delegate = self;
[self.collectionAddedMembers registerClass:AddedMemberCollectionViewCell.class forCellWithReuseIdentifier:cellReuseIdentifierAdded];

Answer 1

您确定该单元格实际上并未添加到您的集合视图中吗？

但是，您做得不对，因为调用 dequeueReusableCellWithReuseIdentifier 不会创建 UICollectionViewCell 而是重新使用现有单元格，因此您在 init 中的初始化代码将永远没有机会被调用。

一个好的方法应该是这样的：

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
    CustomCell *cell = (CustomCell *)[collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath];

    NSDictionary *cellData = [data objectAtIndex:indexPath.row];

    // Call custom cell's configure function to init cell content
    [cell configure:cellData];
    return cell;
}

@interface CustomCell : UICollectionViewCell
-(void)configure:(NSDictionary *)data;
@end

@implementation CustomCell

-(void)configure:(NSDictionary *)data {
    // Init your cell content
}

@end