Please use Code Block when you show some code:
import UIKit
class ViewController: UIViewController {
@IBOutlet var collectionView: UICollectionView!
@IBOutlet var topCollectionView: UICollectionView!
@IBOutlet weak var Leading: NSLayoutConstraint!
@IBOutlet weak var Trailing: NSLayoutConstraint!
@IBOutlet private weak var Menubutton: UIButton!
var menuOut = false
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
//self.navigationItem.titleView = UIImageView(image: UIImage(named: "Logo"))
collectionView.register(MiddleCollectionViewCell.nib(), forCellWithReuseIdentifier: MiddleCollectionViewCell.identifier)
collectionView.delegate=self
collectionView.dataSource=self
topCollectionView.register(CircleCollectionViewCell.self, forCellWithReuseIdentifier: CircleCollectionViewCell.identifier)
topCollectionView.delegate=self
topCollectionView.dataSource=self
// Menu
// start
let destructiveAction = UIAction(title: "Delete",image: UIImage(systemName: "nosign") , attributes: .destructive) { (_) in
print("Delete")
}
let menu = UIMenu(title: "", children: [
UIAction (title: "Add New", image: UIImage(systemName: "plus.circle"), handler: { _ in }),
UIAction (title: "Manage", image: UIImage(systemName: "hammer"), handler: { _ in }),
destructiveAction
])
self.Menubutton.menu = menu
// Menu end
}
// Menu animation
@IBAction func MenuTap(_ sender: Any) {
if menuOut == false {
Leading.constant = -150
Trailing.constant = 150
menuOut = true
}
else{
Leading.constant = 0
Trailing.constant = 0
menuOut = false
}
UIView.animate(withDuration: 0.2, delay: 0.0 , options: .curveEaseIn,animations: {
self.view.layoutIfNeeded()
}){(animationComplete) in
print("Animation Completed")
}
}
// Menu animation ends
}
// used for upper collection view
extension ViewController: UICollectionViewDelegate {
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
collectionView.deselectItem(at: indexPath, animated: true )
print("btn tapped")
}
}
extension ViewController: UICollectionViewDataSource {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 12
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: MiddleCollectionViewCell.identifier, for: indexPath) as! MiddleCollectionViewCell
let topcell = collectionView.dequeueReusableCell(withReuseIdentifier: CircleCollectionViewCell.identifier, for: indexPath) as! CircleCollectionViewCell
topcell.configure(with: "")
cell.configure(with: UIImage(named: "four")!)
return cell; topcell
}
}
//extension ViewController: UICollectionViewDelegateFlowLayout {
//
//}
You register CircleCollectionViewCell.self only for topCollectionView. So, calling collectionView.dequeueReusableCell(withReuseIdentifier: CircleCollectionViewCell.identifier, for: indexPath) causes the error when called where collectionView is not topCollectionView.
You cannot return two things from a single return statement, return cell; topcell does not make sense and ; topcell is ignored.
(You should better not ignore the warnings shown by Xcode.)
You may need to check if collectionView is topCollectionView or not inside delegate methods:
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if collectionView === self.topCollectionView {
let topcell = collectionView.dequeueReusableCell(withReuseIdentifier: CircleCollectionViewCell.identifier, for: indexPath) as! CircleCollectionViewCell
topcell.configure(with: "")
return topcell
} else {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: MiddleCollectionViewCell.identifier, for: indexPath) as! MiddleCollectionViewCell
cell.configure(with: UIImage(named: "four")!)
return cell
}
}
