ios添加UICollectionView reuseIdentifier错误

Question

我在视图中添加了一个UICollectionView，我实现了下面的方法。

我得到错误：

"NSInvalidArgumentException'，原因：'-NSIndexPath reuseIdentifier:未识别的选择器发送到实例‘“

-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
    return 1;
}

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *identifier = @"CellID";
    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];

    UIImageView *imageView = (UIImageView *)[cell viewWithTag:10];
    imageView.image = [UIImage imageNamed:@"V.jpg"];
}

-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
    return 1;
}

Answer 1

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *identifier = @"CellID";
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];

UIImageView *imageView = (UIImageView *)[cell viewWithTag:10];
imageView.image = [UIImage imageNamed:@"V.jpg"];

    return cell; // here is ur mistake
}

将return cell;添加到末尾。

Answer 2

细胞需要注册到CollectionView之前，

   [self.dateCollectionView registerClass:[DateCell Class] forCellWithReuseIdentifier:identifier];

见标识符