CODEWITHSUNDEEP
objective-cuicollectionviewuicollectionviewcellnsobject
Jaymin Raval
Jaymin Raval

Reputation: 205

Collectionview single selection

I want to allow user to select only one cell & data will be reflected based on that. (so only one cell will be selected at a time.) but instead if I click fast with multiple finger I m able to select multiple cell at certain time.

I have done this with didSelectItemAtIndexPath & didDeselectItemAtIndexPath as well but in that case I m not able to select.

Can anyone help for this feature?

Here is the sample code that I m using:-

    [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];
    });  
}

Upvotes: 1

Views: 1330

Answers (2)

Jaymin Raval
Jaymin Raval

Reputation: 205

Finally, I have found solution.

I just made my own custom didDeselect method & handle in cellForItemAtIndexPath.

Upvotes: 0

MD.
MD.

Reputation: 1167

following is my working code.

I declared previousIndexPath in .h like follo below

@property (nonatomic, strong) NSIndexPath *previousIndexPath;

Now in .m file 

-(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];

    }

}

I compared indexpath directly using isEqual: method instead of indexPath.row and == operators.

Upvotes: 2

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