Odtnhj

I currently have a view where I display a collectionView with some categories. I followed this post to get my collectionView to properly load display data. I got that working just fine.

My issue is that now I need to be able to get the text from whichever cell the user selects to use within my search bar.

My current code:

class SearchViewController: ButtonBarPagerTabStripViewController, UISearchBarDelegate

 let headerId = "sectionHeader"
 let categoriesId = "categoriesId"

 lazy var searchBar: UISearchBar = 
 let sb = UISearchBar()
 sb.placeholder = "Search businesses or coupons"
 sb.barTintColor = .gray
 UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).backgroundColor = UIColor.mainWhite()
 sb.delegate = self
 return sb
 ()

 lazy var searchCategriesView: UICollectionView = 
 let layout = UICollectionViewFlowLayout()
 layout.headerReferenceSize = CGSize(width: view.frame.width, height: 75)
 layout.itemSize = CGSize(width: view.frame.width, height: 50)
 layout.minimumInteritemSpacing = 1
 layout.minimumLineSpacing = 1
 layout.scrollDirection = .vertical
 let cv = UICollectionView(frame: .zero, collectionViewLayout: layout)
 cv.backgroundColor = UIColor.mainWhite()
 cv.translatesAutoresizingMaskIntoConstraints = false
 return cv
 ()

 override func viewDidLoad() 
 super.viewDidLoad()
 view.backgroundColor = .white

 categoriesDataSource = SearchCategories()
 searchCategriesView.dataSource = categoriesDataSource

 searchCategriesView.register(SearchCategoriesCell.self, forCellWithReuseIdentifier: categoriesId)
 searchCategriesView.register(SectionHeaderView.self, forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: headerId)
 

 //EXCLUDED VIEW SETUP CODE FOR BREVITY

And as per the link mentioned above, I set up my data source in another file like this:

class SearchCategories: NSObject 
 let categories = ["Apparel & Clothing", "Arts & Crafts", "Automotive",
 "Baby", "Bars & Lounges", "Beauty", "Books",
 "Entertainment",
 "Family & Children", "Furniture",
 "Grocery",
 "Health", "Home & Garden", "Home improvement",
 "Pets", "Pizza",
 "Restaurants",
 "Sporting Goods"]

 let headerId = "sectionHeader"
 let categoriesId = "categoriesId"

 override init() 
 



extension SearchCategories: UICollectionViewDataSource 
 func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int 
 return categories.count
 

 func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell 
 let cell = collectionView.dequeueReusableCell(withReuseIdentifier: categoriesId, for: indexPath) as! SearchCategoriesCell
 cell.label.text = categories[indexPath.item]
 return cell
 

 func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView 

 let sectionHeaderView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: headerId, for: indexPath) as! SectionHeaderView

 if indexPath.section == 0 
 sectionHeaderView.categoryTitleLabel.text = "Search Categories"
 
 return sectionHeaderView
 

 func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) 
 let cell = collectionView.dequeueReusableCell(withReuseIdentifier: categoriesId, for: indexPath) as! SearchCategoriesCell
 //NEED TO PASS THIS DATA BACK TO SEARCHVIEWCONTROLLER
 

How do I now get the cell text back in the SearchViewController whenever a user clicks on a collectionView cell?

Suppose you will hold the text in this function inside SearchViewController

func send(_ res:String)
 print(res)

1- Add a var inside

class SearchCategories: NSObject {

 weak var delegate:SearchViewController?

2- Set the delegate

categoriesDataSource = SearchCategories()
categoriesDataSource.delegate = self

3- Send the clicked text

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) 
 let sendedText = categories[indexPath.item]
 delegate?.send(sendedText)

Edit: You need to add

searchCategriesView.delegate = categoriesDataSource

in viewDidLoad also you can do

searchCategriesView.delegate = self

and implement the didSelectItemAt inside SearchViewController