brightec / customcollectionviewlayout Goto Github PK

Is there a way I can use collectionView reloadData on this collection view? Every time I try to reload the data I get an error like this : 'UICollectionView received layout attributes for a cell with an index path that does not exist:

I am trying to include a search feature to filter collection results but it keeps breaking.

Any ideas on this?

If I add a button that is removing some section, it is crashing after scrolling to last section:

@IBAction func didClick(sender: AnyObject) {
        numberOfSections -= 1;
        let set = NSIndexSet(index: 2)
        self.collectionView.deleteSections(set)
    }

Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'UICollectionView received layout attributes for a cell with an index path that does not exist: <NSIndexPath: 0xc000000000003116> {length = 2, path = 49 - 0}'

Can you help me how to resolve this issue?

I am trying to set this up programmatically in objective-c. I have added the CustomCollectionViewLayout files from this repository and tried to initialize a collection view inside a UIViewController with the layout but this is what I get:

How can I get that same vertical line that is showing in the .gif preview after the sticky column

how can i add cell spacing to my cells . i need a space of 10 after 1st column and 5 after each column. please help.

any updates for swift 2 ?

How can I make dynamic columns in this customcollectionViewLayout

In the Objective-C version of CustomCollectionViewLayout.m, inside the prepareLayout method, following code is written:

// Tip: If we don't know the number of columns we can call the following method and use the NSUInteger object instead of the NUMBEROFCOLUMNS macro
    // NSUInteger numberOfItems = [self.collectionView numberOfItemsInSection:section];

prepareLayout, will be called everytime the bounds change. In that case what would be the value of "section" variable for "numberOfItemsInSection:section". I can't see to find it. If I uncomment it, in my code, it gives error, if I use your file, everything is fine.

I just copied the demo's .m file into my project's .m file

Hi,
I used CustomCollectionViewLayout in my app. i have to maintain the constant width for few columns. by using the width when the text is increased the section height need to be increase . Please give the suggestions to implement dynamic section height to display all the rows in that section contain same height.(Like excel page).

Thank you

When i have more than 7 sections or rows in the collection view, if I scroll the collectionview up and down, i see that the cell content in the second,third and fourth section are getting misplaced or going blank. The header row that is fixed does not have any issues.

How do we resolve this.

func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
        return 0
    }

This is required if datasource is coming form server. First time view refreshes with 0 sections, before response arrive from the server.

I find that if you touch fastly and move diagonally, even if I set Direction Lock Enabled, the table still scroll in both two direction.

any ideas?
thanks for you time.

 // Tip: If we don't know the number of columns we can call the following method and use the NSUInteger object instead of the NUMBEROFCOLUMNS macro
     NSUInteger numberOfItems = [self.collectionView numberOfItemsInSection:section];

where does this section variable come from?

Hi,
I am using CustomCollectionViewLayout in my project. when text is entered in the row the cell height need to adjust automatically like excel sheet . please give suggestions to implement this

It is a great library i integrated it and work properly but there is an issue that i want them to scroll the row either horizontal or vertical at one time (when user move its finger diagonally it scroll both the rows),can you please tell me how to stop this behaviour on diagonal scroll as i am very thankful to you.

how to add dynamic rows and columns in CustomCollectionViewLayout class

Line 183 - CGSize size = [text sizeWithAttributes: @{NSFontAttributeName:[UIFont numercoFontRegularWithSize:15]}];

This is solved

So I used this piece of code, to make the last section stick to the bottom:

if (section == [self.collectionView numberOfSections]-1)
                {
                    CGRect frame = attributes.frame;
                    frame.origin.y = self.collectionView.contentOffset.y + self.collectionView.frame.size.height - 30;
                    attributes.frame = frame;
                }

But, if the last section is pinned to bottom, the collectionview is not able to scroll. If I change frame.origin.y = self.collectionView.contentOffset.y + self.collectionView.frame.size.height - 30;, to frame.origin.y = self.collectionView.contentOffset.y + self.collectionView.frame.size.height + 70;It scrolls little bit downwards until the last section is visible and stops there.

Hi,

I am trying to using this library in Xcode 9.3.
When I increase or decrease the column it gets crashed. Please let me know what need to do?

Thanks,
Rahul Gupta

Hello, i'm new in swift programming

I see in your example this
contentCell.contentLabel.text = "Content"
that was code for set the cell content right?

So, what if i have data that need looping?
Did i just go "for" then inside the looping insert this
contentCell.contentLabel.text = thearray
?

I am trying to figure out if its possible to create a swipe to delete method for an entire row using this script.

I understand each row is made up of many cells, would there be a way to hit the collection view layout and make all cells go one way when swiping?

I try to make header stick when scrolling up and move down with other when contentOffset.y < 0. It works when scrolling slowly but when scroll so fast header move the wrong frame.
Any suggestion help me out of this?
Thanks.

Can you please update this code for swift3

Hello,

I'm trying to open a new viewcontroller on item selection.

If I add an IBAction on my UICollectionViewCell class, I cannot open a new viewcontroller.
I try to add a delegate method on my actual viewcontroller, like
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath),
but when i "click" on an item, it doesn't perfom method.

I'm checked every parameter and setting, all seems to be ok. I don't know what I have to try more.

Thank you for your time.

Hello, and thanks for this great code!

I'm trying to add a header to the view, using the following:

• in the controller, register the Header view supplementary view

collectionView .registerNib(UINib(nibName: "HeaderMulticolumn", bundle: nil), forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: "Header")

then later, implement the delegate methods:

func collectionView(collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, atIndexPath indexPath: NSIndexPath) -> UICollectionReusableView {

let headerView = collectionView.dequeueReusableSupplementaryViewOfKind(kind, withReuseIdentifier: "Header", forIndexPath: indexPath) 

            headerView.backgroundColor = UIColor.blueColor();
            return headerView
}

and in the layout class

    override func layoutAttributesForSupplementaryViewOfKind(elementKind: String, atIndexPath indexPath: NSIndexPath) -> UICollectionViewLayoutAttributes? {
        let attributes = UICollectionViewLayoutAttributes(forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withIndexPath: indexPath)

        let headerHeight = CGFloat(50)
        attributes.frame = CGRectMake(0, 0, self.collectionView!.frame.size.width, headerHeight)

        return attributes;
    }

It's not necessarily a question about your code, but I can't get collectionView: viewForSupplementaryElementOfKind: to be called at all. Is there any chance you could point at the right direction to have Headers added to your custom UICollectionView class?
note: I tried with different layout classes, without changing the controller class, and managed to have headers added, so it must come from the way CustomCollectionViewLayout operates (but I can't see why)
thanks!