You can download my project files here
Look at my cells.
At First it is very normal.
But it get into a mess after I scroll down and up like below.
I don't know why.. and I have wasted my time a few days.
I implemented the method: collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize
Source code: SettingsViewController.swift
import UIKit
class SupplementaryView: UICollectionReusableView {
var imageView = UIImageView()
override init(frame: CGRect) {
super.init(frame: frame)
self.addSubview(imageView)
imageView.translatesAutoresizingMaskIntoConstraints = false
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
class SettingsCell: UICollectionViewCell {
var imageView = UIImageView()
var cellLabel = UILabel()
var textField = UITextField()
override init(frame: CGRect) {
super.init(frame: frame)
self.contentView.addSubview(cellLabel)
cellLabel.translatesAutoresizingMaskIntoConstraints = false
self.contentView.addSubview(textField)
textField.translatesAutoresizingMaskIntoConstraints = false
self.contentView.addSubview(imageView)
imageView.translatesAutoresizingMaskIntoConstraints = false
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
class SettingsViewController: UIViewController {
let uidesign = UIDesign()
let layout = UICollectionViewFlowLayout()
var collectionView: UICollectionView!
let reuseIdentifier = "reuseIdentifier"
let headerIdentifier = "headerIdentifier"
let sections = ["image", "image"]
let cells = ["label", "textField", "image", "label", "textField", "image", "label", "textField", "image", "label", "textField", "image"]
var collectionViewWidth: CGFloat = 0
override func viewDidLoad() {
super.viewDidLoad()
setupUI()
collectionView.dataSource = self
collectionView.delegate = self
}
func setupUI() {
// Navi Bar
self.title = "Math Avengers - Settings"
self.navigationItem.leftBarButtonItem = UIBarButtonItem(title: "이전 단계로", style: .Plain, target: self, action: #selector(self.leftBarButtonPressed))
self.navigationItem.rightBarButtonItem = UIBarButtonItem(title: "다음 단계로", style: .Plain, target: self, action: #selector(self.nextButtonPressed))
layout.scrollDirection = .Vertical
layout.headerReferenceSize = (UIImage(named: "name")?.size)!
layout.sectionHeadersPinToVisibleBounds = true
layout.minimumLineSpacing = 10
layout.minimumInteritemSpacing = 0
layout.sectionInset = UIEdgeInsetsZero
collectionView = UICollectionView(frame: self.view.frame, collectionViewLayout: layout)
collectionView.backgroundColor = UIColor.yellowColor()
collectionView.collectionViewLayout = layout
collectionView.translatesAutoresizingMaskIntoConstraints = false
self.view.addSubview(collectionView)
collectionView.registerClass(SettingsCell.self, forCellWithReuseIdentifier: reuseIdentifier)
collectionView.registerClass(SupplementaryView.self, forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: headerIdentifier)
collectionViewWidth = collectionView.frame.size.width
let viewsDictionary = ["collectionView": collectionView]
self.view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:|[collectionView]|",
options: .AlignAllCenterX, metrics: nil, views: viewsDictionary))
self.view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|[collectionView]|",
options: .AlignAllCenterY, metrics: nil, views: viewsDictionary))
}
func leftBarButtonPressed() {
}
func nextButtonPressed() {
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
extension SettingsViewController: UITextFieldDelegate {
func textFieldShouldReturn(textField: UITextField) -> Bool {
textField.resignFirstResponder()
self.nextButtonPressed()
return true
}
}
extension SettingsViewController: UICollectionViewDataSource {
func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
return sections.count
}
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return cells.count
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as! SettingsCell
switch cells[indexPath.row] {
case "label":
//cell.cellLabel.hidden = false
cell.cellLabel.frame = cell.contentView.frame
cell.cellLabel.text = "이름을 적어주세요.\(indexPath.row)"
uidesign.setLabelLayout(cell.cellLabel, fontsize: 40)
break
case "textField":
cell.textField.frame = cell.contentView.frame
cell.textField.text = "007_\(indexPath.row)"
uidesign.setTextFieldLayout(cell.textField, fontsize: 40)
break
case "image":
cell.imageView.frame = cell.contentView.frame
cell.imageView.image = UIImage(named: "next")
cell.imageView.contentMode = .ScaleAspectFit
break
default:
debugPrint("default")
break
}
return cell
}
// 섹션 헤더 설정
func collectionView(collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, atIndexPath indexPath: NSIndexPath) -> UICollectionReusableView {
var headerView: SupplementaryView?
if (kind == UICollectionElementKindSectionHeader) {
headerView = collectionView.dequeueReusableSupplementaryViewOfKind(kind, withReuseIdentifier: headerIdentifier, forIndexPath: indexPath) as? SupplementaryView
let image = indexPath.row % 2 == 0 ? UIImage(named: "name") : UIImage(named: "age")
headerView?.imageView.image = image
headerView?.imageView.contentMode = .ScaleAspectFit
headerView?.imageView.frame = CGRectMake(0, 0, collectionViewWidth, image!.size.height)
headerView?.backgroundColor = UIColor(red: 1, green: 1, blue: 1, alpha: 0.5)
}
return headerView!
}
func collectionView(collectionView: UICollectionView, willDisplayCell cell: UICollectionViewCell, forItemAtIndexPath indexPath: NSIndexPath) {
let cell = cell as! SettingsCell
switch cells[indexPath.row] {
case "label":
cell.backgroundColor = UIColor(red: 0, green: 1, blue: 0, alpha: 0.5)
cell.cellLabel.hidden = false
cell.imageView.hidden = true
cell.textField.hidden = true
break
case "textField":
cell.backgroundColor = UIColor(red: 1, green: 0.5, blue: 0, alpha: 0.5)
cell.textField.hidden = false
cell.cellLabel.hidden = true
cell.imageView.hidden = true
break
case "image":
cell.backgroundColor = UIColor(red: 0, green: 0.5, blue: 1, alpha: 0.5)
cell.imageView.hidden = false
cell.cellLabel.hidden = true
cell.textField.hidden = true
break
default:
break
}
}
}
extension SettingsViewController: UICollectionViewDelegateFlowLayout {
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {
switch cells[indexPath.row] {
case "label":
return CGSizeMake(collectionViewWidth, 200)
case "image":
let img = UIImage(named: "next")
return CGSizeMake(collectionViewWidth, 200) //(img?.size.height)!)
case "textField":
return CGSizeMake(collectionViewWidth-200, 100)
default:
return CGSizeMake(collectionViewWidth, 200)
}
}
}
sizeForItemAtIndexPath. — Also, your idea of configuring these cells subviews without using autolayout might not be a very good idea. – matt