iphone - ios添加UICollectionViewreuseIdentifier报错

Question

我已经在我的视图中添加了一个UICollectionView。我已经实现了下面的方法。

我得到错误：

“NSInvalidArgumentException”，原因：'-[NSIndexPath reuseIdentifier]：无法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
}

添加return cell;到结尾。

Answer 2

单元格需要注册到 CollectionView 之前，

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

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