Swift 如何访问视图控制器中uicollectionviewcell的内容？
我正在尝试向UICollectionViewCell内的文本字段添加底部边框，我在我的集合视图所在的视图控制器内注册了该单元格。但是要设置底部边框的大小，我需要设置为它自己的大小，我不知道如何在集合视图单元格中设置，所以我试图将它传递给注册它的视图控制器，但还没有成功 *Obs：我删掉了部分代码，因为它们不相关。 UICollectionViewCellSwift 如何访问视图控制器中uicollectionviewcell的内容？,swift,xcode,uicollectionview,uicollectionviewcell,Swift,Xcode,Uicollectionview,Uicollectionviewcell,我正在尝试向UICollectionViewCell内的文本字段添加底部边框，我在我的集合视图所在的视图控制器内注册了该单元格。但是要设置底部边框的大小，我需要设置为它自己的大小，我不知道如何在集合视图单元格中设置，所以我试图将它传递给注册它的视图控制器，但还没有成功 *Obs：我删掉了部分代码，因为它们不相关。 UICollectionViewCell class NameStepCell: UICollectionViewCell { let safeAreaHolder: UIV
class NameStepCell: UICollectionViewCell {
let safeAreaHolder: UIView = {
let view = UIView()
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()
let title: UILabel = {
let label = UILabel()
label.translatesAutoresizingMaskIntoConstraints = false
label.numberOfLines = 0
label.font = UIFont.boldSystemFont(ofSize: 40)
label.text = "What is\nyour\nname?"
return label
}()
let txtFieldStack: UIStackView = {
let stack = UIStackView()
stack.translatesAutoresizingMaskIntoConstraints = false
stack.alignment = .center
stack.axis = .horizontal
stack.distribution = .fillEqually
stack.spacing = 20
return stack
}()
let nameField: UITextField = {
let txtFld = UITextField()
txtFld.keyboardType = UIKeyboardType.default
txtFld.textContentType = UITextContentType.name
txtFld.autocapitalizationType = UITextAutocapitalizationType.words
txtFld.autocorrectionType = .no
txtFld.textColor = UIColor.black
return txtFld
}()
let lastNameField: UITextField = {
let txtFld = UITextField()
txtFld.keyboardType = UIKeyboardType.default
txtFld.textContentType = UITextContentType.familyName
txtFld.autocapitalizationType = UITextAutocapitalizationType.words
txtFld.autocorrectionType = .no
txtFld.textColor = UIColor.black
return txtFld
}()
override init(frame: CGRect) {
super.init(frame: frame)
configuringView()
configuringTitle()
configuringTxtField()
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func configuringView(){
addSubview(safeAreaHolder)
safeAreaHolder.topAnchor.constraint(equalTo: topAnchor).isActive = true
safeAreaHolder.trailingAnchor.constraint(equalTo: trailingAnchor, constant: -16).isActive = true
safeAreaHolder.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true
safeAreaHolder.leadingAnchor.constraint(equalTo: leadingAnchor, constant: 16).isActive = true
}
func configuringTitle(){
safeAreaHolder.addSubview(title)
title.topAnchor.constraint(equalTo: safeAreaHolder.topAnchor, constant: 50).isActive = true
title.trailingAnchor.constraint(equalTo: safeAreaHolder.trailingAnchor).isActive = true
title.leadingAnchor.constraint(equalTo: safeAreaHolder.leadingAnchor).isActive = true
}
func configuringTxtField(){
safeAreaHolder.addSubview(txtFieldStack)
txtFieldStack.topAnchor.constraint(equalTo: title.bottomAnchor, constant: 50).isActive = true
txtFieldStack.trailingAnchor.constraint(equalTo: safeAreaHolder.trailingAnchor).isActive = true
txtFieldStack.leadingAnchor.constraint(equalTo: safeAreaHolder.leadingAnchor).isActive = true
txtFieldStack.addArrangedSubview(nameField)
txtFieldStack.addArrangedSubview(lastNameField)
nameField.heightAnchor.constraint(equalToConstant: 45).isActive = true
lastNameField.heightAnchor.constraint(equalToConstant: 45).isActive = true
}
}
class SignupViewController: UIViewController, UICollectionViewDelegateFlowLayout, UICollectionViewDelegate, UICollectionViewDataSource{
let stepsCollectionView: UICollectionView = {
let layout = UICollectionViewFlowLayout()
layout.scrollDirection = .horizontal
let collectionView = UICollectionView(frame: .zero, collectionViewLayout: layout)
collectionView.translatesAutoresizingMaskIntoConstraints = false
collectionView.backgroundColor = .white
collectionView.contentInsetAdjustmentBehavior = UIScrollView.ContentInsetAdjustmentBehavior.never
collectionView.isPagingEnabled = true
collectionView.showsHorizontalScrollIndicator = false
collectionView.isScrollEnabled = false
return collectionView
}()
override func viewDidLoad() {
super.viewDidLoad()
stepsCollectionView.dataSource = self
stepsCollectionView.delegate = self
stepsCollectionView.register(NameStepCell.self, forCellWithReuseIdentifier: "nameStepId")
stepsCollectionView.register(GenderStepCell.self, forCellWithReuseIdentifier: "genderStepId")
stepsCollectionView.register(BirthdayStepCell.self, forCellWithReuseIdentifier: "birthdayStepId")
stepsCollectionView.register(EmailStepCell.self, forCellWithReuseIdentifier: "emailStepId")
stepsCollectionView.register(PasswordStepCell.self, forCellWithReuseIdentifier: "passwordStepId")
view.backgroundColor = .white
configuringBottomButton()
configuringStepCollectionView()
}
override func viewDidAppear(_ animated: Bool) {
}
Here is where I try to get the nameFied to add the border
override func viewDidLayoutSubviews() {
NameStepCell().self.nameField.addBottomBorder()
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 5
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if indexPath.item == 1 {
let genderCell = collectionView.dequeueReusableCell(withReuseIdentifier: "genderStepId", for: indexPath)
return genderCell
}else if indexPath.item == 2{
let birthdayCell = collectionView.dequeueReusableCell(withReuseIdentifier: "birthdayStepId", for: indexPath)
return birthdayCell
}else if indexPath.item == 3{
let emailCell = collectionView.dequeueReusableCell(withReuseIdentifier: "emailStepId", for: indexPath)
return emailCell
}else if indexPath.item == 4{
let passwordCell = collectionView.dequeueReusableCell(withReuseIdentifier: "passwordStepId", for: indexPath)
return passwordCell
}
let nameCell = collectionView.dequeueReusableCell(withReuseIdentifier: "nameStepId", for: indexPath)
return nameCell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: stepsCollectionView.frame.size.width, height: stepsCollectionView.frame.size.height)
}
}
extension UITextField {
func addBottomBorder() {
let border = CALayer()
border.frame = CGRect(x: 0, y: 32, width: self.frame.size.width, height: 1)
border.cornerRadius = 2
border.masksToBounds = true
border.backgroundColor = UIColor.init(red: 112/255, green: 112/255, blue: 112/255, alpha: 1).cgColor
self.layer.masksToBounds = true
self.layer.addSublayer(border)
}
}
class SignupViewController: UIViewController, UICollectionViewDelegateFlowLayout, UICollectionViewDelegate, UICollectionViewDataSource{
let stepsCollectionView: UICollectionView = {
let layout = UICollectionViewFlowLayout()
layout.scrollDirection = .horizontal
let collectionView = UICollectionView(frame: .zero, collectionViewLayout: layout)
collectionView.translatesAutoresizingMaskIntoConstraints = false
collectionView.backgroundColor = .white
collectionView.contentInsetAdjustmentBehavior = UIScrollView.ContentInsetAdjustmentBehavior.never
collectionView.isPagingEnabled = true
collectionView.showsHorizontalScrollIndicator = false
collectionView.isScrollEnabled = false
return collectionView
}()
override func viewDidLoad() {
super.viewDidLoad()
stepsCollectionView.dataSource = self
stepsCollectionView.delegate = self
stepsCollectionView.register(NameStepCell.self, forCellWithReuseIdentifier: "nameStepId")
stepsCollectionView.register(GenderStepCell.self, forCellWithReuseIdentifier: "genderStepId")
stepsCollectionView.register(BirthdayStepCell.self, forCellWithReuseIdentifier: "birthdayStepId")
stepsCollectionView.register(EmailStepCell.self, forCellWithReuseIdentifier: "emailStepId")
stepsCollectionView.register(PasswordStepCell.self, forCellWithReuseIdentifier: "passwordStepId")
view.backgroundColor = .white
configuringBottomButton()
configuringStepCollectionView()
}
override func viewDidAppear(_ animated: Bool) {
}
Here is where I try to get the nameFied to add the border
override func viewDidLayoutSubviews() {
NameStepCell().self.nameField.addBottomBorder()
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 5
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if indexPath.item == 1 {
let genderCell = collectionView.dequeueReusableCell(withReuseIdentifier: "genderStepId", for: indexPath)
return genderCell
}else if indexPath.item == 2{
let birthdayCell = collectionView.dequeueReusableCell(withReuseIdentifier: "birthdayStepId", for: indexPath)
return birthdayCell
}else if indexPath.item == 3{
let emailCell = collectionView.dequeueReusableCell(withReuseIdentifier: "emailStepId", for: indexPath)
return emailCell
}else if indexPath.item == 4{
let passwordCell = collectionView.dequeueReusableCell(withReuseIdentifier: "passwordStepId", for: indexPath)
return passwordCell
}
let nameCell = collectionView.dequeueReusableCell(withReuseIdentifier: "nameStepId", for: indexPath)
return nameCell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: stepsCollectionView.frame.size.width, height: stepsCollectionView.frame.size.height)
}
}
extension UITextField {
func addBottomBorder() {
let border = CALayer()
border.frame = CGRect(x: 0, y: 32, width: self.frame.size.width, height: 1)
border.cornerRadius = 2
border.masksToBounds = true
border.backgroundColor = UIColor.init(red: 112/255, green: 112/255, blue: 112/255, alpha: 1).cgColor
self.layer.masksToBounds = true
self.layer.addSublayer(border)
}
}
您可以尝试以下方法，而不是在viewDidLayoutSubviews中调用addBottomBar（）
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if indexPath.item == 1 {
let genderCell = collectionView.dequeueReusableCell(withReuseIdentifier: "genderStepId", for: indexPath)
return genderCell
}else if indexPath.item == 2{
let birthdayCell = collectionView.dequeueReusableCell(withReuseIdentifier: "birthdayStepId", for: indexPath)
return birthdayCell
}else if indexPath.item == 3{
let emailCell = collectionView.dequeueReusableCell(withReuseIdentifier: "emailStepId", for: indexPath)
return emailCell
}else if indexPath.item == 4{
let passwordCell = collectionView.dequeueReusableCell(withReuseIdentifier: "passwordStepId", for: indexPath)
return passwordCell
}
// Dequeue your NameStepCell from collection view
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "nameStepId", for: indexPath)
if let nameCell = cell as? NameStepCell {
// Add bottom border to it right here and return it
nameCell.nameField.addBottomBorder()
return nameCell
}
return cell
}
class NameStepCell: UICollectionViewCell {
var safeAreaHolder: UIView!
var title: UILabel!
var txtFieldStack: UIStackView!
var nameField: UITextField!
var lastNameField: UITextField!
override init(frame: CGRect) {
super.init(frame: frame)
configuringView()
configuringTitle()
configuringTxtField()
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
private extension NameStepCell {
func configuringView(){
let view = UIView()
view.translatesAutoresizingMaskIntoConstraints = false
self.safeAreaHolder = view
addSubview(safeAreaHolder)
safeAreaHolder.topAnchor.constraint(equalTo: topAnchor).isActive = true
safeAreaHolder.trailingAnchor.constraint(equalTo: trailingAnchor, constant: -16).isActive = true
safeAreaHolder.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true
safeAreaHolder.leadingAnchor.constraint(equalTo: leadingAnchor, constant: 16).isActive = true
self.safeAreaHolder.layoutIfNeeded()
}
func configuringTitle(){
let label = UILabel()
label.translatesAutoresizingMaskIntoConstraints = false
label.numberOfLines = 0
label.font = UIFont.boldSystemFont(ofSize: 40)
label.text = "What is\nyour\nname?"
self.title = label
safeAreaHolder.addSubview(title)
title.topAnchor.constraint(equalTo: safeAreaHolder.topAnchor, constant: 50).isActive = true
title.trailingAnchor.constraint(equalTo: safeAreaHolder.trailingAnchor).isActive = true
title.leadingAnchor.constraint(equalTo: safeAreaHolder.leadingAnchor).isActive = true
self.title.layoutIfNeeded()
}
func configuringTxtField(){
let stack = UIStackView()
stack.backgroundColor = .lightGray
stack.translatesAutoresizingMaskIntoConstraints = false
stack.alignment = .center
stack.axis = .horizontal
stack.distribution = .fillEqually
stack.spacing = 20
self.txtFieldStack = stack
safeAreaHolder.addSubview(txtFieldStack)
txtFieldStack.topAnchor.constraint(equalTo: title.bottomAnchor, constant: 50).isActive = true
txtFieldStack.trailingAnchor.constraint(equalTo: safeAreaHolder.trailingAnchor).isActive = true
txtFieldStack.leadingAnchor.constraint(equalTo: safeAreaHolder.leadingAnchor).isActive = true
self.txtFieldStack.layoutIfNeeded()
self.nameField = getTextField(.name)
self.lastNameField = getTextField(.familyName)
txtFieldStack.addArrangedSubview(nameField)
txtFieldStack.addArrangedSubview(lastNameField)
nameField.heightAnchor.constraint(equalToConstant: 45).isActive = true
lastNameField.heightAnchor.constraint(equalToConstant: 45).isActive = true
// After adding constraints, you should call 'layoutIfNeeded()' which recomputes the size and position based on the constraints you've set
self.nameField.layoutIfNeeded()
self.lastNameField.layoutIfNeeded()
self.nameField.addBottomBorder()
self.lastNameField.addBottomBorder()
}
func getTextField(_ textContentType: UITextContentType) -> UITextField {
let textField = UITextField()
textField.keyboardType = .default
textField.textContentType = textContentType
textField.autocapitalizationType = .words
textField.autocorrectionType = .no
textField.textColor = .black
textField.placeholder = textContentType.rawValue // P.S. Remove placeholder if you don't need.
return textField
}
}
为什么不在创建变量的地方直接使用addBottomBorder扩展名呢。txtFld.addBottomBorder（）。它应该可以工作。通常我这样做是为了组织我的代码，但我只是尝试了一下，什么也没发生！它不起作用，什么也没有出现！我获取扩展名中文本字段大小的方式是否有问题？是否在NameStepCell中添加了约束或将frame设置为大小和位置nameField？否，我没有！我在这里测试了一个东西，当我试图通过使用“nameCell.nameField.frame.size.width”获取文本字段的宽度时，它返回0。这有可能是问题所在吗？？？是的。您需要使用类似于let-txtFld=UITextField（frame:CGRect（x:50，y:50，width:100，height:100））的内容来代替let-txtFld=UITextField（）。或者您应该使用约束来调整名称中文本字段的大小和位置。我对上面的内容理解错误，我使用约束，我的名称字段位于堆栈视图中，它固定在边框上。