Collectionview单选

Question

我想允许用户 select 只有一个单元格和数据将基于它反映出来。（因此一次只会 select 编辑一个单元格。）但是如果我用多个手指快速单击，我可以在特定时间 select 多个单元格。

我也用 didSelectItemAtIndexPath 和 didDeselectItemAtIndexPath 完成了此操作，但在那种情况下我无法 select。

任何人都可以为此功能提供帮助吗？

这是我使用的示例代码：-

    [CustomCollection setShowsHorizontalScrollIndicator:NO];
    [CustomCollection setBounces:NO];
    [CustomCollection setAllowsMultipleSelection:NO];
    [CustomCollection setMultipleTouchEnabled:NO];

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *identifier = @"TheCustomCell";

       CustomCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];

        if (previousIndexPath.row == indexPath.row) {
    // Code for Selecttion
        [cell.tickImgView setImage:[UIImage imageNamed:@"Select_tick"]];

    }
     else{
        [cell.tickImgView setImage:[UIImage imageNamed:@"Deselect_tick"]];

}


}


-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
    dispatch_async(dispatch_get_main_queue(), ^{
        previousIndexPath = indexPath;
        [CustomCollection reloadData];
    });  
}

Answer 1

以下是我的工作代码。

我在 .h 中声明了 previousIndexPath，如下所示以下

@property (nonatomic, strong) NSIndexPath *previousIndexPath;

现在在 .m 文件中

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *identifier = @"TheCustomCell";

    CustomCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];

    if ([self.previousIndexPath isEqual:indexPath]) {
        // Code for Selecttion
        [cell.tickImgView setImage:[UIImage imageNamed:@"Select_tick"]];

    }
    else{
        //Code for deselect
        [cell.tickImgView setImage:[UIImage imageNamed:@"Deselect_tick"]];

    }
    return cell;

}


-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
    //reload collectionview data only if its not selected already 
    if (![self.previousIndexPath isEqual:indexPath])
    {
        self.previousIndexPath = indexPath;
        [collectionView reloadData];

    }

}

我直接使用 isEqual: 方法而不是 indexPath.row 和 == 运算符比较了索引路径。

Answer 2

终于找到解决方法了

我刚刚在 cellForItemAtIndexPath 中制作了自己的自定义 didDeselect 方法和句柄。

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