How to create UICollectionViewCell programmatically
Solution 1:
Try to copy and paste this code into your xcode, it should work
//
// HomeVIewController.swift
// Photolancer
//
// Created by Lee SangJoon on 9/8/16.
// Copyright © 2016 Givnite. All rights reserved.
//
import UIKit
class HomeViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {
var collectionview: UICollectionView!
var cellId = "Cell"
override func viewDidLoad() {
super.viewDidLoad()
// Create an instance of UICollectionViewFlowLayout since you cant
// Initialize UICollectionView without a layout
let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
layout.sectionInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
layout.itemSize = CGSize(width: view.frame.width, height: 700)
collectionview = UICollectionView(frame: self.view.frame, collectionViewLayout: layout)
collectionview.dataSource = self
collectionview.delegate = self
collectionview.registerClass(FreelancerCell.self, forCellWithReuseIdentifier: cellId)
collectionview.showsVerticalScrollIndicator = false
collectionview.backgroundColor = UIColor.whiteColor()
self.view.addSubview(collectionview)
}
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 10
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionview.dequeueReusableCellWithReuseIdentifier(cellId, forIndexPath: indexPath) as! FreelancerCell
return cell
}
}
class FreelancerCell: UICollectionViewCell {
let profileImageButton: UIButton = {
let button = UIButton()
button.backgroundColor = UIColor.whiteColor()
button.layer.cornerRadius = 18
button.clipsToBounds = true
button.setImage(UIImage(named: "Profile"), forState: .Normal)
button.translatesAutoresizingMaskIntoConstraints = false
return button
}()
let nameLabel: UILabel = {
let label = UILabel()
label.font = UIFont.systemFontOfSize(14)
label.textColor = UIColor.darkGrayColor()
label.text = "Bob Lee"
label.translatesAutoresizingMaskIntoConstraints = false
return label
}()
let distanceLabel: UILabel = {
let label = UILabel()
label.textColor = UIColor.lightGrayColor()
label.font = UIFont.systemFontOfSize(14)
label.text = "30000 miles"
label.translatesAutoresizingMaskIntoConstraints = false
return label
}()
let pricePerHourLabel: UILabel = {
let label = UILabel()
label.textColor = UIColor.darkGrayColor()
label.font = UIFont.systemFontOfSize(14)
label.text = "$40/hour"
label.translatesAutoresizingMaskIntoConstraints = false
return label
}()
let ratingLabel: UILabel = {
let label = UILabel()
label.textColor = UIColor.lightGrayColor()
label.font = UIFont.systemFontOfSize(14)
label.text = "4.9+"
label.translatesAutoresizingMaskIntoConstraints = false
return label
}()
let showCaseImageView: UIImageView = {
let imageView = UIImageView()
imageView.backgroundColor = UIColor.whiteColor()
imageView.image = UIImage(named: "Profile")
imageView.translatesAutoresizingMaskIntoConstraints = false
return imageView
}()
let likesLabel: UILabel = {
let label = UILabel()
label.textColor = UIColor.lightGrayColor()
label.font = UIFont.systemFontOfSize(14)
label.text = "424 likes"
label.translatesAutoresizingMaskIntoConstraints = false
return label
}()
let topSeparatorView: UIView = {
let view = UIView()
view.backgroundColor = UIColor.darkGrayColor()
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()
let bottomSeparatorView: UIView = {
let view = UIView()
view.backgroundColor = UIColor.darkGrayColor()
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()
let likeButton: UIButton = {
let button = UIButton()
button.setTitle("Like", forState: .Normal)
button.titleLabel?.font = UIFont.systemFontOfSize(18)
button.setTitleColor(UIColor.darkGrayColor(), forState: .Normal)
button.translatesAutoresizingMaskIntoConstraints = false
return button
}()
let hireButton: UIButton = {
let button = UIButton()
button.setTitle("Hire", forState: .Normal)
button.titleLabel?.font = UIFont.systemFontOfSize(18)
button.setTitleColor(UIColor.darkGrayColor(), forState: .Normal)
button.translatesAutoresizingMaskIntoConstraints = false
return button
}()
let messageButton: UIButton = {
let button = UIButton()
button.setTitle("Message", forState: .Normal)
button.titleLabel?.font = UIFont.systemFontOfSize(18)
button.setTitleColor(UIColor.darkGrayColor(), forState: .Normal)
button.translatesAutoresizingMaskIntoConstraints = false
return button
}()
let stackView: UIStackView = {
let sv = UIStackView()
sv.axis = UILayoutConstraintAxis.Horizontal
sv.alignment = UIStackViewAlignment.Center
sv.distribution = UIStackViewDistribution.FillEqually
sv.translatesAutoresizingMaskIntoConstraints = false;
return sv
}()
override init(frame: CGRect) {
super.init(frame: frame)
addViews()
}
func addViews(){
backgroundColor = UIColor.blackColor()
addSubview(profileImageButton)
addSubview(nameLabel)
addSubview(distanceLabel)
addSubview(pricePerHourLabel)
addSubview(ratingLabel)
addSubview(showCaseImageView)
addSubview(likesLabel)
addSubview(topSeparatorView)
addSubview(bottomSeparatorView)
// Stack View
addSubview(likeButton)
addSubview(messageButton)
addSubview(hireButton)
addSubview(stackView)
profileImageButton.leftAnchor.constraintEqualToAnchor(leftAnchor, constant: 5).active = true
profileImageButton.topAnchor.constraintEqualToAnchor(topAnchor, constant: 10).active = true
profileImageButton.heightAnchor.constraintEqualToConstant(36).active = true
profileImageButton.widthAnchor.constraintEqualToConstant(36).active = true
nameLabel.leftAnchor.constraintEqualToAnchor(profileImageButton.rightAnchor, constant: 5).active = true
nameLabel.centerYAnchor.constraintEqualToAnchor(profileImageButton.centerYAnchor, constant: -8).active = true
nameLabel.rightAnchor.constraintEqualToAnchor(pricePerHourLabel.leftAnchor).active = true
distanceLabel.leftAnchor.constraintEqualToAnchor(nameLabel.leftAnchor).active = true
distanceLabel.centerYAnchor.constraintEqualToAnchor(profileImageButton.centerYAnchor, constant: 8).active = true
distanceLabel.widthAnchor.constraintEqualToConstant(300)
pricePerHourLabel.rightAnchor.constraintEqualToAnchor(rightAnchor, constant: -10).active = true
pricePerHourLabel.centerYAnchor.constraintEqualToAnchor(nameLabel.centerYAnchor).active = true
// Distance depeneded on the priceLabel and distance Label
ratingLabel.rightAnchor.constraintEqualToAnchor(pricePerHourLabel.rightAnchor).active = true
ratingLabel.centerYAnchor.constraintEqualToAnchor(distanceLabel.centerYAnchor).active = true
showCaseImageView.topAnchor.constraintEqualToAnchor(profileImageButton.bottomAnchor, constant: 10).active = true
showCaseImageView.widthAnchor.constraintEqualToAnchor(widthAnchor).active = true
showCaseImageView.heightAnchor.constraintEqualToConstant(UIScreen.mainScreen().bounds.width - 20).active = true
likesLabel.topAnchor.constraintEqualToAnchor(showCaseImageView.bottomAnchor, constant: 10).active = true
likesLabel.leftAnchor.constraintEqualToAnchor(profileImageButton.leftAnchor).active = true
topSeparatorView.topAnchor.constraintEqualToAnchor(likesLabel.bottomAnchor, constant: 10).active = true
topSeparatorView.widthAnchor.constraintEqualToAnchor(widthAnchor).active = true
topSeparatorView.heightAnchor.constraintEqualToConstant(0.5).active = true
stackView.addArrangedSubview(likeButton)
stackView.addArrangedSubview(hireButton)
stackView.addArrangedSubview(messageButton)
stackView.topAnchor.constraintEqualToAnchor(topSeparatorView.bottomAnchor, constant: 4).active = true
stackView.widthAnchor.constraintEqualToAnchor(widthAnchor).active = true
stackView.centerXAnchor.constraintEqualToAnchor(centerXAnchor).active = true
bottomSeparatorView.topAnchor.constraintEqualToAnchor(stackView.bottomAnchor, constant: 4).active = true
bottomSeparatorView.widthAnchor.constraintEqualToAnchor(widthAnchor).active = true
bottomSeparatorView.heightAnchor.constraintEqualToConstant(0.5).active = true
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
Solution 2:
Your problem lies here. In your viewDidLoad(), you're registering your collectionView cell twice. You are registering the collectionview's cell to your custom cell class in the first line and then in the second line you are registering it to the class UICollectionViewCell.
collectionView.registerClass(MyCollectionViewCell.self, forCellWithReuseIdentifier: cellReuseIdentifier)
collectionView.registerClass(UICollectionViewCell.self, forCellWithReuseIdentifier: "collectionCell")
Just remove the second line and your code should work.
Solution 3:
I changed Bob Lee answer for swift 4
import UIKit
class noNibCollectionViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {
var collectionview: UICollectionView!
var cellId = "Cell"
override func viewDidLoad() {
super.viewDidLoad()
// Create an instance of UICollectionViewFlowLayout since you cant
// Initialize UICollectionView without a layout
let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
layout.sectionInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
layout.itemSize = CGSize(width: view.frame.width, height: 700)
collectionview = UICollectionView(frame: self.view.frame, collectionViewLayout: layout)
collectionview.dataSource = self
collectionview.delegate = self
collectionview.register(FreelancerCell.self, forCellWithReuseIdentifier: cellId)
collectionview.showsVerticalScrollIndicator = false
collectionview.backgroundColor = UIColor.white
self.view.addSubview(collectionview)
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 10
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionview.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath) as! FreelancerCell
return cell
}
}
class FreelancerCell: UICollectionViewCell {
let profileImageButton: UIButton = {
let button = UIButton()
button.backgroundColor = UIColor.white
button.layer.cornerRadius = 18
button.clipsToBounds = true
button.setImage(UIImage(named: "Profile"), for: .normal)
button.translatesAutoresizingMaskIntoConstraints = false
return button
}()
let nameLabel: UILabel = {
let label = UILabel()
label.font = UIFont.systemFont(ofSize: 14)
label.textColor = UIColor.darkGray
label.text = "Bob Lee"
label.translatesAutoresizingMaskIntoConstraints = false
return label
}()
let distanceLabel: UILabel = {
let label = UILabel()
label.textColor = UIColor.lightGray
label.font = UIFont.systemFont(ofSize: 14)
label.text = "30000 miles"
label.translatesAutoresizingMaskIntoConstraints = false
return label
}()
let pricePerHourLabel: UILabel = {
let label = UILabel()
label.textColor = UIColor.darkGray
label.font = UIFont.systemFont(ofSize: 14)
label.text = "$40/hour"
label.translatesAutoresizingMaskIntoConstraints = false
return label
}()
let ratingLabel: UILabel = {
let label = UILabel()
label.textColor = UIColor.lightGray
label.font = UIFont.systemFont(ofSize: 14)
label.text = "4.9+"
label.translatesAutoresizingMaskIntoConstraints = false
return label
}()
let showCaseImageView: UIImageView = {
let imageView = UIImageView()
imageView.backgroundColor = UIColor.white
imageView.image = UIImage(named: "Profile")
imageView.translatesAutoresizingMaskIntoConstraints = false
return imageView
}()
let likesLabel: UILabel = {
let label = UILabel()
label.textColor = UIColor.lightGray
label.font = UIFont.systemFont(ofSize: 14)
label.text = "424 likes"
label.translatesAutoresizingMaskIntoConstraints = false
return label
}()
let topSeparatorView: UIView = {
let view = UIView()
view.backgroundColor = UIColor.darkGray
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()
let bottomSeparatorView: UIView = {
let view = UIView()
view.backgroundColor = UIColor.darkGray
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()
let likeButton: UIButton = {
let button = UIButton()
button.setTitle("Like", for: .normal)
button.titleLabel?.font = UIFont.systemFont(ofSize: 18)
button.setTitleColor(UIColor.darkGray, for: .normal)
button.translatesAutoresizingMaskIntoConstraints = false
return button
}()
let hireButton: UIButton = {
let button = UIButton()
button.setTitle("Hire", for: .normal)
button.titleLabel?.font = UIFont.systemFont(ofSize: 18)
button.setTitleColor(UIColor.darkGray, for: .normal)
button.translatesAutoresizingMaskIntoConstraints = false
return button
}()
let messageButton: UIButton = {
let button = UIButton()
button.setTitle("Message", for: .normal)
button.titleLabel?.font = UIFont.systemFont(ofSize: 18)
button.setTitleColor(UIColor.darkGray, for: .normal)
button.translatesAutoresizingMaskIntoConstraints = false
return button
}()
let stackView: UIStackView = {
let sv = UIStackView()
sv.axis = UILayoutConstraintAxis.horizontal
sv.alignment = UIStackViewAlignment.center
sv.distribution = UIStackViewDistribution.fillEqually
sv.translatesAutoresizingMaskIntoConstraints = false;
return sv
}()
override init(frame: CGRect) {
super.init(frame: frame)
addViews()
}
func addViews(){
backgroundColor = UIColor.black
addSubview(profileImageButton)
addSubview(nameLabel)
addSubview(distanceLabel)
addSubview(pricePerHourLabel)
addSubview(ratingLabel)
addSubview(showCaseImageView)
addSubview(likesLabel)
addSubview(topSeparatorView)
addSubview(bottomSeparatorView)
// Stack View
addSubview(likeButton)
addSubview(messageButton)
addSubview(hireButton)
addSubview(stackView)
profileImageButton.leftAnchor.constraint(equalTo: leftAnchor, constant: 5).isActive = true
profileImageButton.topAnchor.constraint(equalTo: topAnchor, constant: 10).isActive = true
profileImageButton.heightAnchor.constraint(equalToConstant: 36).isActive = true
profileImageButton.widthAnchor.constraint(equalToConstant: 36).isActive = true
nameLabel.leftAnchor.constraint(equalTo: profileImageButton.rightAnchor, constant: 5).isActive = true
nameLabel.centerYAnchor.constraint(equalTo: profileImageButton.centerYAnchor, constant: -8).isActive = true
nameLabel.rightAnchor.constraint(equalTo: pricePerHourLabel.leftAnchor).isActive = true
distanceLabel.leftAnchor.constraint(equalTo: nameLabel.leftAnchor).isActive = true
distanceLabel.centerYAnchor.constraint(equalTo: profileImageButton.centerYAnchor, constant: 8).isActive = true
distanceLabel.widthAnchor.constraint(equalToConstant: 300)
pricePerHourLabel.rightAnchor.constraint(equalTo: rightAnchor, constant: -10).isActive = true
pricePerHourLabel.centerYAnchor.constraint(equalTo: nameLabel.centerYAnchor).isActive = true
// Distance depeneded on the priceLabel and distance Label
ratingLabel.rightAnchor.constraint(equalTo: pricePerHourLabel.rightAnchor).isActive = true
ratingLabel.centerYAnchor.constraint(equalTo: distanceLabel.centerYAnchor).isActive = true
showCaseImageView.topAnchor.constraint(equalTo: profileImageButton.bottomAnchor, constant: 10).isActive = true
showCaseImageView.widthAnchor.constraint(equalTo: widthAnchor).isActive = true
showCaseImageView.heightAnchor.constraint(equalToConstant: UIScreen.main.bounds.width - 20).isActive = true
likesLabel.topAnchor.constraint(equalTo: showCaseImageView.bottomAnchor, constant: 10).isActive = true
likesLabel.leftAnchor.constraint(equalTo: profileImageButton.leftAnchor).isActive = true
topSeparatorView.topAnchor.constraint(equalTo: likesLabel.bottomAnchor, constant: 10).isActive = true
topSeparatorView.widthAnchor.constraint(equalTo: widthAnchor).isActive = true
topSeparatorView.heightAnchor.constraint(equalToConstant: 0.5).isActive = true
stackView.addArrangedSubview(likeButton)
stackView.addArrangedSubview(hireButton)
stackView.addArrangedSubview(messageButton)
stackView.topAnchor.constraint(equalTo: topSeparatorView.bottomAnchor, constant: 4).isActive = true
stackView.widthAnchor.constraint(equalTo: widthAnchor).isActive = true
stackView.centerXAnchor.constraint(equalTo: centerXAnchor).isActive = true
bottomSeparatorView.topAnchor.constraint(equalTo: stackView.bottomAnchor, constant: 4).isActive = true
bottomSeparatorView.widthAnchor.constraint(equalTo: widthAnchor).isActive = true
bottomSeparatorView.heightAnchor.constraint(equalToConstant: 0.5).isActive = true
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}