I created a Collection View using purely the storyboard interface builder. This is what the storyboard looks like:
My collection view's properties are default as well. I haven't written anything into my ViewController.swift yet.
For some reason, when I run on my phone / emulator, none of the buttons are showing.
UICollectionView does not support static cells like UITableView. You will have to set its dataSource,delegate and configure your cells in code.
Just configure the collectionView properly see below code and image:
Implement the delegate methods of collectionView:
class yourClassController: UICollectionViewDataSource, UICollectionViewDelegate {
override func numberOfSectionsInCollectionView(collectionView:
UICollectionView!) -> Int {
return 1
}
override func collectionView(collectionView: UICollectionView!,
numberOfItemsInSection section: Int) -> Int {
return yourArray.count
}
override func collectionView(collectionView: UICollectionView!,
cellForItemAtIndexPath indexPath: NSIndexPath!) ->
UICollectionViewCell! {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("CollectionViewCell", forIndexPath: indexPath) as CollectionViewCell
// Configure the cell
cell.backgroundColor = UIColor.blackColor()
cell.textLabel?.text = "\(indexPath.section):\(indexPath.row)"
cell.imageView?.image = UIImage(named: "circle")
return cell
}
Then from your storyboard set the delegate and datasource by drag and drop see image:
Note: collectionView appears when you do complete above formality with its relevant class.
Related
This question already has answers here:
ios 8 Swift - TableView with embedded CollectionView
(3 answers)
Closed 4 years ago.
]2I have use one tableView. Inside tableViewCell i want to populate a collectionView.
I have a static array
Here is my code
var menuImage = ["download.jpeg","download (1).jpeg","download (2).jpeg","download (3).jpeg","download (4).jpeg","download (3).jpeg","download (4).jpeg","download (3).jpeg","download (4).jpeg"]
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return menuImage.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell:HomeTableViewCell = tableView.dequeueReusableCell(withIdentifier: "HomeTableViewCell", for: indexPath) as! HomeTableViewCell
// cell.collectionView.reloadData()
return cell
}
inside tableViewCell ->
class HomeTableViewCell: UITableViewCell {
#IBOutlet weak var collectionView: UICollectionView!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
}
and this is the collectionView
extension HomeVC: UICollectionViewDelegate, UICollectionViewDataSource {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return menuImage.count
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "HomeCollectionViewCell", for: indexPath) as! HomeCollectionViewCell
cell.imgvw.image = UIImage(named: menuImage[indexPath.row])
cell.profileName.text = menus[indexPath.row]
return cell
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
print("Collection view at row \(collectionView.tag) selected index path \(indexPath)")
}
}
Still the static data is not showing. please help
If you want to show all images below username than you need to change the Layout. it's not possible in that layout.
so my suggestion is : You display only user details in HomeVC, once any row is tapped, move to new screen and show user details along with all images like instagram user profile.
Edit of your Demo : https://www.dropbox.com/s/v05k2udqa3pu1dd/Demp1.zip?dl=0
I would suggest you to Follow the steps mentioned in this Video Collection View inside TableView cell
Moreover you can refer this link also:
Collectionview in tableview cell
Hope this helps.
Issue in Image added
As stated by you , you have added the image directly to Xcode i.e. Drag and Drop,
So do cross check if the Target Member Ship is ticked or not.? If not the please tick that.
Also it is suggested to name the image properly like image1,image2,image3,image4,etc so that it gets detected without any issue.
Edit Link to a demo Project added
You can find a demo of Collection View inside a tableView cell here: Demo of imageCollectionView inside TableViewCell
Having UICollectionView as a child of UITableView row. UICollectionView contains images, but whenever I scroll tableview down and up the collection view images got vanished randomly. I am attaching images for my problem reference. Please suggest me how to stop this.
I want my tableview to be like this. And its items should not change on scrolling.
----------------------------------------------------------------------------------------------------------------------------------------------
The collectionview images got vanish on scrolling tableview. It looks like this after scrolling up.
Code Is as follow:
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell{
let cell:PartOfLookTableViewCell = self.looksListTable.dequeueReusableCell(withIdentifier: "cell") as! PartOfLookTableViewCell
let oneRecord = looksArray[indexPath.row]
cell.myCollectionView.loadInitial(_dataArray: oneRecord.imagesArray, isLooks: 1)
return cell
}
Code for loading data to CollectionView:
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: looksReuseIdentifier, for: indexPath) as! CustomCollectionViewCell
let oneRecord = inputArray[indexPath.row]
cell.productImage.sd_setImage(with: URL.init(string: oneRecord.thumb_url)){ (image, error, cacheType, url) in
DispatchQueue.main.async {
cell.productImage.image = image
}
}
}
}
}
#Sourabh Bissa :
UITableView reuses the cell using method CellForRowAtIndexPath whenever your new cell gets visible your this method reuse the data source.
The very important thing here is to maintain the data source:
In your case cell for the row at index path giving the updated value to the collection view method but you are not reloading in main Queue. Try to do it immediately after you get the data source.
Your Cell for the row at index path will look like this :
guard let cell = self.tableview.dequeueReusableCell(withIdentifier: "cell") as! PartOfLookTableViewCell else {
return UITableViewCell()
}
let oneRecord = looksArray[indexPath.row]
cell.configureCell(for record : oneRecord with looks : 1)
return cell
and Now in the cell, you will have collection view outlet, where you will implement a collection view data source method and there you download your images asynchronously.
Cell Class will look like this :
class PartOfLookTableViewCell: UITableViewCell {
#IBOutlet weak var collectionView: UICollectionView!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
collectionView.delegate = self
collectionView.dataSource = self
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
func configureCell(for record : Record , with looks : Int) {
// Here reload your collection view
// This collection view will be specific to the cell.
collectionView.reloadData()
}
}
extension PartOfLookTableViewCell : UICollectionViewDelegate , UICollectionViewDataSource {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
//return array
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
// Asyncronously download images
}
}
This is how you can achieve your requirements without using any tags. Please let me know if you have any Queries in it.
I have a weird issue with UICollectionView and UITabBarController. Inside the UITabBarController i have references to two different ViewControllers. If i put View Controller that has UICollectionView as a first page of UITabBarController then my list with cells (UICollectionView) is loading normally like this:
But if i put it as a second View Controller when i open the tab it is like UIImageView and UILabel are disappearing from the cells:
I have checked collectionView method that is getting the cells and there is always data printed for the Label and Image. Here is a code of the methods for DataSource and Delagate
// tell the collection view how many cells to make
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return self.items.count
}
// make a cell for each cell index path
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
// get a reference to our storyboard cell
let cell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as! AdsCollectionViewCell
// Use the outlet in our custom class to get a reference to the UILabel in the cell
cell.myLabel.text = self.items[indexPath.item]
cell.backgroundColor = UIColor.whiteColor() // make cell more visible in our
cell.layer.borderColor = UIColor.grayColor().CGColor
cell.layer.borderWidth = 1
cell.layer.cornerRadius = 8
cell.layoutIfNeeded()
return cell
}
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {
let width = collectionView.frame.width - 22;
return CGSize(width: width/2, height: width/2);
}
// MARK: - UICollectionViewDelegate protocol
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
// handle tap events
print("You selected cell #\(indexPath.item)!")
}
Is there someone that had problem like this? How can it be solved?
I tried to create a dummy photo app with UICollectionView. My Xcode version is 7.2 and Swift version 2.1.1. I use Storyboard to build the UI part by following the tutorial from http://www.raywenderlich.com/78550/beginning-ios-collection-views-swift-part-1
In Swift 2.0, the UICollectionViewDataSource is inherited from UICollectionViewController, we don't need to explicitly declare those protocols. I implemented the required override methods for DataSource, and also register the customized cell in viewDidLoad() in the UICollectionViewController. I put a test Label in my cell to check whether it works or not. Unfortunately, the label never appear after I launch the app. I attach some of my code below as reference:
UICollectionViewController
class VacationsCollectionViewController: UICollectionViewController {
private let reuseIdentifier = "VacationCell"
override func viewDidLoad() {
super.viewDidLoad()
self.collectionView!.registerClass(VacationsCollectionViewCell.self, forCellWithReuseIdentifier: reuseIdentifier)
}
// MARK: UICollectionViewDataSource
override func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of items
return 1
}
override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as! VacationsCollectionViewCell
// Configure the cell
cell.backgroundColor = UIColor.blueColor()
cell.CellText.text = "Show me the money"
return cell
}
}
UICollectionViewCell
class VacationsCollectionViewCell: UICollectionViewCell {
#IBOutlet weak var CellText: UILabel!
}
Any idea why the label never show up in my dummy app?
It looks like you have everything you need. The issue is probably with your storyboard. Just to be safe, add constraints to the label so it's definitely going to be displayed properly. Then, add an extension to your collection view controller and be sure the size allows the label to be displayed as well. This, at least, worked for me and I was in your exact situation.
extension OfficesCollectionViewController: UICollectionViewDelegateFlowLayout{
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {
return CGSize(width: 200, height: 200)
}
}
At UITableView, completely static tableView config is possible. You can disconnect UITableView's datasource and put each cell on storyboard(or xib) by using IB.
I tried same thing with UICollectionView. disconnect UICollectionView's datasource. Put each cell on UICollectionView on storyboard. I built it without any errors. But it didin't work. cells were not displayed at all.
Is UICollectionView without datasource possible?
No.
Creating a static UICollectionViewController is not allowed. You must have a data source delegate.
I also want to point out that there is not a static UITableView, but a static UITableViewController. It's a difference.
You can easily create a static UICollectionViewController.
Just create every cell in interface builder, give them re-use identifiers(e.g. "Home_1" "Home_2" "Home_3"), and populate the methods as follows:
class HomeViewController: UICollectionViewController, UICollectionViewDelegateFlowLayout {
let cellIdentifiers:[String] = ["Home_1","Home_2","Home_3"]
let sizes:[CGSize] = [CGSize(width:320, height:260),CGSize(width:320, height:160),CGSize(width:320, height:100)]
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return cellIdentifiers.count
}
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
return collectionView.dequeueReusableCell(withReuseIdentifier: cellIdentifiers[indexPath.item], for: indexPath)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return sizes[indexPath.item]
}
}
Then set the view controller to be of the proper class, and, hey presto, a (basically) static collection. I'm sorry to say but this is BY FAR the best way to support portrait and landscape views when you have groups of controls...
I did a little experimenting and wanted to add my own method since it helped me achieve the truly static, highly custom Collection View I was looking for.
You can create custom UICollectionViewCells for each cell you want to display in your Collection View, and register them with all the Cell IDs in your Collection View, like this:
Create your static cell:
class MyRedCell: UICollectionViewCell {
override init(frame: CGRect) {
super.init(frame: frame)
contentView.backgroundColor = .red
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
Make as many of these as you want.
And then back in your Collection View Controller, register them with their corresponding cellId:
let cellIds = ["redCell","blueCell","greenCell"]
override func viewDidLoad() {
super.viewDidLoad()
collectionView.register(MyRedCell.self, forCellWithReuseIdentifier: "redCell")
collectionView.register(MyBlueCell.self, forCellWithReuseIdentifier: "blueCell")
collectionView.register(MyGreenCell.self, forCellWithReuseIdentifier: "greenCell")
}
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellIds[indexPath.item], for: indexPath)
return cell
}
Each cell will display exactly what's in its class.