Question

我在视图中有一个collectionView。我确实设置了数据源，委托和所有内容。

此单元正在工作：

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

但是在我的自定义单元格AddedMemberCollectionViewCell上，它不添加新单元格：

- (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。这是怎么回事？

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

您确定该单元格未真正添加到您的收藏夹视图中吗？

但是，您做得不好，因为调用dequeueReusableCellWithReuseIdentifier不会创建UICollectionViewCell，而是会重用现有的单元格，因此init中的初始化代码将永远没有机会被称为。

一种好的方法应如下所示：

- (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

UICollection视图-不要添加新的自定义单元格

1 个答案: