I have 2 arrays with different data
var array : [String] = ["getMeals", "getMeasure", "getWorkouts"]
var array2 : [String] = ["getStep", "getStep", "getStep"]
I am trying to retrieve the images from arrays, but in different collection cells.
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if indexPath.section == 0{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "WorkoutCollectionCell", for: indexPath) as! WorkoutCollectionCell
cell.collectionImage.image = UIImage(named: array[indexPath.row])
return cell
}else{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "WorkoutCollectionCell", for: indexPath) as! WorkoutCollectionCell
cell.collectionImage.image = UIImage(named: array2[indexPath.row])
return cell
}
}
I need to create another UICollectionViewCell or I can use the current cell?
you can use the same cell, with this code:
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "WorkoutCollectionCell", for: indexPath) as! WorkoutCollectionCell
if indexPath.section == 0{
cell.collectionImage.image = UIImage(named: array[indexPath.row])
}else{
cell.collectionImage.image = UIImage(named: array2[indexPath.row])
}
return cell
}
You need 1 array like
let array = [["getMeals", "getMeasure", "getWorkouts"],["getStep", "getStep", "getStep"]]
func numberOfSections(in collectionView: UICollectionView) -> Int {
return array.count
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return array[section].count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "WorkoutCollectionCell", for: indexPath) as! WorkoutCollectionCell
cell.collectionImage.image = UIImage(named: array[indexPath.section][indexPath.row])
return cell
}
Related
I am working on an existing project which has a collectionView, right now i want to add another collectionView in this same viewcontroller. Already tried different solutions but can not seem to have any luck. Here is the existing code for collectionview:
func numberOfSections(in collectionView: UICollectionView) -> Int {
if homeList.last?.catList.isEmpty ?? false{
return homeList.count - 1
}
return self.homeList.count
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
if section == homeList.count - 1{
return 2
}
return homeList[section].catList.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if indexPath.section == homeList.count - 1{
let doctorsCell = collectionView.dequeueReusableCell(withReuseIdentifier: "doctorCell", for: indexPath) as! DoctorsCVC
doctorsCell.docDelegate = self
doctorsCell.docList = homeList[indexPath.section].catList as? [Doctor] ?? []
delayOnMain(0.1){
doctorsCell.docCollectionView.reloadData()
}
return doctorsCell
}
else{
let productsCell = collectionView.dequeueReusableCell(withReuseIdentifier: "productCell", for: indexPath) as! ProductCVC
productsCell.setData(homeList[indexPath.section].catList[indexPath.row])
productsCell.fivePercentView.layer.cornerRadius = 5
return productsCell
}
}
And here is my new code for collectionView:
#IBOutlet var collectionView2: UICollectionView!
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return arrData.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath) as! CollectionViewCell
cell.img.image = arrData[indexPath.row].image
return cell
}
Can someone help me to merge this code!
What I think is a clearer method is to use a second collectionViewController and a custom container view controller.
That way, the differentiation in the delegate methods is no longer needed.
You can't use two same collectionView delegate methods (eg -cellForItemAt ) methods in same view controller. So you have to check the collection view inside every collectionView delegate methods.
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
if collectionView == self.collectionView2 {
return arrData.count
} else {
if section == homeList.count - 1 {
return 2
}
return homeList[section].catList.count
}
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if collectionView == self.collectionView2 {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath) as! CollectionViewCell
cell.img.image = arrData[indexPath.row].image
return cell
}else{
if indexPath.section == homeList.count - 1{
let doctorsCell = collectionView.dequeueReusableCell(withReuseIdentifier: "doctorCell", for: indexPath) as! DoctorsCVC
doctorsCell.docDelegate = self
doctorsCell.docList = homeList[indexPath.section].catList as? [Doctor] ?? []
delayOnMain(0.1){
doctorsCell.docCollectionView.reloadData()
}
return doctorsCell
}
else{
let productsCell = collectionView.dequeueReusableCell(withReuseIdentifier: "productCell", for: indexPath) as! ProductCVC
productsCell.setData(homeList[indexPath.section].catList[indexPath.row])
productsCell.fivePercentView.layer.cornerRadius = 5
return productsCell
}
}
}
How to determine size collection view when I use two different type of cell and the size of one of these cells is always one but other one's size are depend on array and because of that its size is dynamic.
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if indexPath.row == 0 {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "ProfileCell", for: indexPath) as! ProfileCollectionViewCell
cell.bioLabelText.text = bio
return cell
}else {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath) as! CountryCollectionViewCell
cell.countryLabel.text = city
cell.imgView.image = UIImage(named: "lake.jpg")
cell.makeRounded()
return cell
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return uniqueCountryArray.count
}
my ProfileCell number should be one and the number of other cell should be uniqueCountryArray.count. However when I write "return uniqueCountryArray.count + 1" , it gives me error. When I write "return uniqueCountryArray.count" , I missed one array element.
How can I take all of array elements dynamically ? And id array size is 0, I should still show I cell comes from profile Cell.
Change your city = uniqueCountryArray[indexPath.row] to city = uniqueCountryArray[indexPath.row-1] like below
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if indexPath.row == 0 {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "ProfileCell", for: indexPath) as! ProfileCollectionViewCell
cell.bioLabelText.text = bio
return cell
}
else {
let city = uniqueCountryArray[indexPath.row-1]
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath) as! CountryCollectionViewCell
cell.countryLabel.text = city
cell.imgView.image = UIImage(named: "lake.jpg")
cell.makeRounded()
return cell
}
}
And numberOfItemsInSection will be uniqueCountryArray.count+1
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return uniqueCountryArray.count+1
}
I have two custom cell classes HomeCell & CreateCell. Ideally, the first cell should be the CreateCell & the HomeCell's should start at the index of '1' (After the first create cell) but currently, the CreateCell and the first HomeCell are overlapping. Is there a way I can set the HomeCell's to start at the index of '1'?
If there is any more code that needs to be provided, let me know.
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if indexPath.row == 0 {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CreateCell", for: indexPath) as! CreateCell
//configure your cell here...
return cell
} else {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "HomeCell", for: indexPath) as! HomeCell
cell.list = lists[indexPath.item]
//configure your cell with list
return cell
}
}
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return lists.count
}
Since you want to access 0th element of List on 1st index, you would need to change the code a little bit in your cellForItemAt indexPath:
cell.list = lists[indexPath.item - 1]
in this way, you will start the HomeCell views from 1st index
Also You would need to change the count of total items, as there is additional create cell.
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return lists.count+1
}
Use indexPath.item in place of indexPath.row
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if indexPath.item == 0 {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CreateCell", for: indexPath) as! CreateCell
//configure your cell here...
return cell
} else {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "HomeCell", for: indexPath) as! HomeCell
cell.list = lists[indexPath.item]
//configure your cell with list
return cell
}
}
My code below would work if it was displayed on a label. But in this function I am getting the error message Missing return in a function expected to return 'UICollectionViewCell'. Putting the return cell in the for loop does not work.
import UIKit
class collectionVIEW: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate {
var users = [User]()
#IBOutlet var theIssues: UICollectionView!
override func viewDidLoad() {
super.viewDidLoad()
// users = cdHandler.fetchObject()!
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return users.count
}
func getDefaultCell() -> UICollectionViewCell{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! whyCollectionViewCell
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if cdHandler.fetchObject() != nil {
users = cdHandler.fetchObject()!
for c in users {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! whyCollectionViewCell
cell.general.text = "\((cell.general.text)!)+\((c.userName)!)"
return cell
}
} else {
return getDefaultCell()
}
}
}
cellForItemAt method expects to return UICollectionViewCell in all cases. In the else condition, return a default cell as below:-
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if cdHandler.fetchObject() != nil {
users = cdHandler.fetchObject()!
for c in users {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! whyCollectionViewCell
cell.general.text = "\((cell.general.text)!)+\((c.userName)!)"
return cell
}
}else{
return getDefaultCell()
}
Note:-Register collection view with identifier defaultCcell
func getDefaultCell() -> UICollectionViewCell{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "defaultCcell", for: indexPath) as! UICollectionViewCell
return cell
}
I'm facing an issue with CollectionView, I want to see a collection of images and have an add button as the last item so first of all I've made an array of NSData as I'm gonna save those images to Core Data
var photoArray = [NSData]()
then I implement UICollectionViewDataSource
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 1
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
if indexPath.item == photoArray.count + 1 {
present(imagePicker, animated: true, completion: nil)
}
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return photoArray.count + 1
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "photoItem", for: indexPath) as? PhotoCell else {return UICollectionViewCell()}
cell.btn.tag = indexPath.item
if indexPath.item == photoArray.count + 1 {
cell.thumImage.image = UIImage(named: "add_button")
cell.btn.isHidden = true
print("first")
return cell
} else {
let img = photoArray[indexPath.item]
cell.configureAddingImage(img: img)
print("second")
return cell
}
}
Actually I'm facing with the problem in "cellForItemAt indexPath" like "fatal error: index is out of range" I tried to make array look like var photoArray: [NSData]! but it caused other problems, please give me any advice or help, thank you!
Index is out of range because items or rows are indexed from 0
Should be like this:
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "photoItem", for: indexPath) as? PhotoCell else {return UICollectionViewCell()}
cell.btn.tag = indexPath.row
if indexPath.row == photoArray.count {
cell.thumImage.image = UIImage(named: "add_button")
cell.btn.isHidden = true
print("first")
return cell
} else {
let img = photoArray[indexPath.row]
cell.configureAddingImage(img: img)
print("second")
return cell
}
}