问题
I have TableView and inside TableViewCell I have added UICollectionView. Now when user taps on any UICollectionView, I want to pass the data to next viewController but unfortunately I cannot use perform segue inside UITableViewCell class where I have didselect item. Is there any way to perform segue over here ?
Whole Code
class UserLibraryViewController: UIViewController {
extension UserLibraryViewController : UITableViewDelegate { }
extension UserLibraryViewController : UITableViewDataSource {
func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return myBooksGenre[section]
}
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return myBooksGenre.count
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("userBooksTableViewCell") as! UserLibraryTableViewCell
cell.tableIndexPath = indexPath
return cell
}
}
TableViewCell
class UserLibraryTableViewCell: UITableViewCell {
@IBOutlet weak var collectionView: UICollectionView!
var tableIndexPath: NSIndexPath?
}
extension UserLibraryTableViewCell : UICollectionViewDataSource {
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 12
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("userBooksCollectionViewCell", forIndexPath: indexPath) as! UserLibraryCollectionViewCell
return cell
}
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
print("\(self.tableIndexPath!.section) ---- \(indexPath.item) \(tableSectionHeader[self.tableIndexPath!.section]) ")
}
}
extension UserLibraryTableViewCell : UICollectionViewDelegateFlowLayout {
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {
let itemsPerRow:CGFloat = 4
let hardCodedPadding:CGFloat = 5
let itemWidth = (collectionView.bounds.width / itemsPerRow) - hardCodedPadding
let itemHeight = collectionView.bounds.height - (2 * hardCodedPadding)
return CGSize(width: itemWidth, height: itemHeight)
}
}
回答1:
Create one protocol, after that create its instance inside TableViewCell and implement the protocol in the UserLibraryViewController, after that in the didSelectItemAtIndexPath of CollectionView use that delegate instance to call the method like this.
protocol CustomCollectionDelegate {
func selectedCollectionCell(indexPath: NSIndexPath)
}
class UserLibraryTableViewCell: UITableViewCell {
@IBOutlet weak var collectionView: UICollectionView!
var tableIndexPath: NSIndexPath?
var delegate: CustomCollectionDelegate?
}
Now call this method inside your didSelectItemAtIndexPath of CollectionView.
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
print("\(self.tableIndexPath!.section) ---- \(indexPath.item) \(tableSectionHeader[self.tableIndexPath!.section]) ")
self.delegate?.selectedCollectionCell(indexPath)
}
Now implement this protocol in UserLibraryViewController like this and set delegate in the cellForRowAtIndexPath.
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("userBooksTableViewCell") as! UserLibraryTableViewCell
cell.tableIndexPath = indexPath
cell.delegate = self
return cell
}
extension UserLibraryViewController : CustomCollectionDelegate {
func selectedCollectionCell(indexPath: NSIndexPath) {
self.performSegueWithIdentifier("Identifier", sender: indexPath)
}
}
Note: I have added protocol method with NSIndexPath as parameter you can change it with your custom object or with Dictionary/Array.
来源：https://stackoverflow.com/questions/39369420/perfomsegues-in-uitableviewcell-class