我试图在集合视图中对单元格上的长按手势进行编码,但是我还没有发现类似的内容...我想我会在'didSelectItemAt'中编写代码。 现在只有在我点击第一个单元格时才有效... 然后我在网上找到了基于swift 3的不同解决方案。
每个人都帮帮我吗?非常感谢你!
import UIKit
class RecipeCollViewController: UICollectionViewController, UITextFieldDelegate
{
struct Storyboard
{
static let leftAndRightPaddings: CGFloat = 2.0
static let numberOfItemsPerRow: CGFloat = 2.0
}
override func viewDidLoad() {
super.viewDidLoad()
RecipeDataManager.shared.recipeController = self
title = loc("TITLE_RECIPECOLL")
navigationController?.navigationBar.prefersLargeTitles = true
let collectionViewWidth = collectionView?.frame.width
let itemWidth = (collectionViewWidth! - Storyboard.leftAndRightPaddings) / Storyboard.numberOfItemsPerRow
let layout = collectionViewLayout as! UICollectionViewFlowLayout
layout.itemSize = CGSize(width: itemWidth, height: 250)
}
override func numberOfSections(in collectionView: UICollectionView) -> Int
{
return 1
}
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int
{
return RecipeDataManager.shared.recipes.count
}
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "RecipeCell", for: indexPath) as! RecipeViewCell
let recipe = RecipeDataManager.shared.recipes[indexPath.item]
cell.labelNameRecipe.text = recipe.titleRecipe
cell.imageViewRecipe.image = recipe.imageRecipe
cell.labelPrepareTime.text = String(recipe.recipeTimeInt)
cell.labelPeopleFor.text = recipe.peopleRecipe
return cell
}
override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath)
{
}
// MARK: - NAVIGAZIONE
// Metodo che scatta quando l'utente tocca una delle celle della collectionView e apre il dettaglio
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{
if segue.identifier == "RecipeDetail"
{
if let indexPath = self.collectionView!.indexPathsForSelectedItems?.first
{
let recipeDetailVC = segue.destination as! DetailRecipeViewController
recipeDetailVC.recipe = RecipeDataManager.shared.recipes[indexPath.item]
}
}
}
// MARK: - UILongPressGestureRecognizer function for the cell recipe
@IBAction func popUpActionCell(longPressGesture : UILongPressGestureRecognizer)
{
let alertActionCell = UIAlertController(title: "Action Recipe Cell", message: "Choose an action for the selected recipe", preferredStyle: .actionSheet)
// Configure Remove Item Action
let deleteAction = UIAlertAction(title: "Delete", style: .destructive, handler: { action in
// Delete selected Cell
let deleteRecipe: [RecipeDataManager] = []
if let indexPath = self.collectionView?.indexPathsForSelectedItems?.first
{
RecipeDataManager.shared.recipes.remove(at: indexPath.item)
RecipeDataManager.shared.salva()
self.collectionView?.deleteItems(at: [indexPath])
}
print("Cell Removed")
})
// Configure Cancel Action Sheet
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: { acion in
print("Cancel actionsheet")
})
alertActionCell.addAction(deleteAction)
alertActionCell.addAction(cancelAction)
self.present(alertActionCell, animated: true, completion: nil)
self.collectionView!.reloadData()
}
}
答案 0 :(得分:0)
在我的恳求下,我找到了解决问题的最终解决方案。 发布其他新开发人员需要帮助的代码!
// MARK: - Long Press Gesture Action Sheet
@IBAction func popUpActionCell(longPressGesture : UILongPressGestureRecognizer)
{
// Delete selected Cell
let point = longPressGesture.location(in: self.collectionView)
let indexPath = self.collectionView?.indexPathForItem(at: point)
// let cell = self.collectionView?.cellForItem(at: indexPath!)
if indexPath != nil
{
let alertActionCell = UIAlertController(title: "Action Recipe Cell", message: "Choose an action for the selected recipe", preferredStyle: .actionSheet)
// Configure Remove Item Action
let deleteAction = UIAlertAction(title: "Delete", style: .destructive, handler: { action in
RecipeDataManager.shared.recipes.remove(at: indexPath!.row)
print("Cell Removed")
self.collectionView!.reloadData()
})
// Configure Cancel Action Sheet
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: { acion in
print("Cancel actionsheet")
})
alertActionCell.addAction(deleteAction)
alertActionCell.addAction(cancelAction)
self.present(alertActionCell, animated: true, completion: nil)
}
}