I have existing view in which I need to add UIImageView and UILabel at top below safe area.
Following is the way I create both UIImageView and UILabel
private var cardLbl: UILabel = {
let label = UILabel()
label.translatesAutoresizingMaskIntoConstraints = false
label.textColor = .white
label.text = "Hello User..."
label.textAlignment = .center
label.font = UIFont.preferredFont(style: .light, size: 14)
label.accessibilityTraits = .header
return label
}()
private var cardImg: UIImageView = {
let imageView = UIImageView()
imageView.backgroundColor = .red
return imageView
}()
Then by using these methods I add them on view
private func setupCardArtImage(){
view.addSubview(cardImg)
NSLayoutConstraint.activate([
cardImg.leadingAnchor.constraint(equalTo: view.leadingAnchor),
cardImg.centerXAnchor.constraint(equalTo: view.centerXAnchor),
cardImg.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 10),
cardImg.trailingAnchor.constraint(equalTo: view.trailingAnchor),
cardImg.heightAnchor.constraint(equalToConstant: 80),
cardImg.widthAnchor.constraint(equalToConstant: 127)])
}
and
private func setupCardArtName(){
view.addSubview(cardLbl)
NSLayoutConstraint.activate([
cardLbl.leadingAnchor.constraint(equalTo: view.leadingAnchor),
cardLbl.centerXAnchor.constraint(equalTo: view.centerXAnchor),
cardLbl.topAnchor.constraint(equalTo: cardImg.bottomAnchor, constant: 10),
cardLbl.trailingAnchor.constraint(equalTo: view.trailingAnchor),
cardLbl.heightAnchor.constraint(equalToConstant: 30)])
}
Problem I am facing is, I am able to add UILabel successfully, but I am not able to add UIImageView successfully.
Following images you can see that I am able to see UILabel at top, but when I call method to UIImageView I am not able to get it.
Can any one please help me to understand what I am doing wrong and guide me with solution.
Thanks for help in advance.
All thanks to #Paulw11 who help me quickly to get the solution.
Following is the code snippet with working solution.
private func setupCardArtImage(){
cardImg.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(cardImg)
NSLayoutConstraint.activate([
cardImg.centerXAnchor.constraint(equalTo: view.centerXAnchor),
cardImg.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 10),
cardImg.heightAnchor.constraint(equalToConstant: 80),
cardImg.widthAnchor.constraint(equalToConstant: 127)])
}
Related
To design and create my UI, I always use auto layouts and do it programmatically instead of using storyboard.
In every view class of mine, I have a method called
private func setupView(frame:CGRect) {
/* START CONTAINER VIEW */
containerView = UIView()
containerView.translatesAutoresizingMaskIntoConstraints = false
addSubview(containerView)
containerView.leadingAnchor.constraint(equalTo: leadingAnchor, constant: frame.width * (13 / IPHONE8_SCREEN_WIDTH)).isActive = true
containerView.trailingAnchor.constraint(equalTo: trailingAnchor, constant: -frame.width * (13 / IPHONE8_SCREEN_WIDTH)).isActive = true
containerView.topAnchor.constraint(equalTo: topAnchor, constant: frame.height * (26 / IPHONE8_SCREEN_HEIGHT)).isActive = true
containerView.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true
containerView.backgroundColor = UIColor.white
/* END CONTAINER VIEW */
...
}
to initialize the components. Now let's say, in the method above, I initialize 10 UI components which are properly displayed when I run my code. However, depending on some variables, I have another function that is being called
private func addNextRoundInformation() {
..
nextRoundLabel = UILabel()
nextRoundLabel.translatesAutoresizingMaskIntoConstraints = false
containerView.addSubview(nextRoundLabel)
nextRoundLabel.leadingAnchor.constraint(equalTo: currentRoundLabel.leadingAnchor).isActive = true
nextRoundLabel.widthAnchor.constraint(equalTo:currentRoundLabel.widthAnchor).isActive = true
nextRoundLabel.topAnchor.constraint(equalTo: roundEndsInLabel.bottomAnchor, constant: frame.height * (19 / IPHONE8_SCREEN_HEIGHT)).isActive = true
}
which should place a new label between some others which were already initialized.
Of course, when putting the new label between some particular ones, I also update the auto layout constraints of the of the bottom label like
private func updateNumberOfWinnersLabelConstraint() {
numberOfWinnersPerRoundLabel.topAnchor.constraint(equalTo: nextRoundLabel.bottomAnchor, constant: frame.height * (19 / IPHONE8_SCREEN_HEIGHT)).isActive = true
numberOfWinnersPerRoundLabelValue.topAnchor.constraint(equalTo: nextRoundLabelValue.bottomAnchor, constant: frame.height * (19 / IPHONE8_SCREEN_HEIGHT)).isActive = true
}
The topAnchor of each label depends on the bottom anchor of the previous one.
With this approach, I can't see nextRoundLabel at all. It only appears, if I initialize it in the private func setupView(frame:CGRect) {}
Why?
You could do this with "Top-to-Bottom" constraints, but it would be rather complex.
You would need to essentially create a "Linked List" to track each view, the views above and below it, and its constraints.
So, to "insert" a new view after the 3rd view, you would need to:
deactivate the inter-view constraints
insert the new view into the linked list
re-create and activate the new constraints
Putting your views in a UIStackView turns that process into a single line of code:
stackView.insertArrangedSubview(newView, at: 3)
Here's a quick example:
class ViewController: UIViewController {
let testView: SampleView = SampleView()
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .systemYellow
let infoLabel: UILabel = {
let v = UILabel()
v.textAlignment = .center
v.numberOfLines = 0
v.text = "Tap to Insert \"New Label\"\nafter \"Label 3\""
return v
}()
let btn: UIButton = {
let v = UIButton()
v.setTitle("Insert", for: [])
v.setTitleColor(.white, for: .normal)
v.setTitleColor(.lightGray, for: .highlighted)
v.backgroundColor = .systemBlue
return v
}()
[infoLabel, btn, testView].forEach { v in
v.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(v)
}
let g = view.safeAreaLayoutGuide
NSLayoutConstraint.activate([
infoLabel.topAnchor.constraint(equalTo: g.topAnchor, constant: 40.0),
infoLabel.widthAnchor.constraint(equalTo: g.widthAnchor, multiplier: 0.75),
infoLabel.centerXAnchor.constraint(equalTo: g.centerXAnchor),
btn.topAnchor.constraint(equalTo: infoLabel.bottomAnchor, constant: 20.0),
btn.widthAnchor.constraint(equalTo: g.widthAnchor, multiplier: 0.75),
btn.centerXAnchor.constraint(equalTo: g.centerXAnchor),
testView.topAnchor.constraint(equalTo: btn.bottomAnchor, constant: 40.0),
testView.leadingAnchor.constraint(equalTo: g.leadingAnchor, constant: 40.0),
testView.trailingAnchor.constraint(equalTo: g.trailingAnchor, constant: -40.0),
testView.bottomAnchor.constraint(equalTo: g.bottomAnchor, constant: -40.0),
])
btn.addTarget(self, action: #selector(btnTapped(_:)), for: .touchUpInside)
}
#objc func btnTapped(_ sender: Any?) {
testView.insertNew()
}
}
class SampleView: UIView {
var containerView: UIView!
var stackView: UIStackView!
override init(frame: CGRect) {
super.init(frame: frame)
commonInit()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
commonInit()
}
private func commonInit() {
backgroundColor = .red
setupView(frame: .zero)
}
private func setupView(frame:CGRect) {
/* START CONTAINER VIEW */
containerView = UIView()
containerView.translatesAutoresizingMaskIntoConstraints = false
addSubview(containerView)
stackView = UIStackView()
stackView.axis = .vertical
stackView.spacing = 8
stackView.translatesAutoresizingMaskIntoConstraints = false
containerView.addSubview(stackView)
NSLayoutConstraint.activate([
containerView.leadingAnchor.constraint(equalTo: leadingAnchor, constant: 12),
containerView.trailingAnchor.constraint(equalTo: trailingAnchor, constant: -12),
containerView.topAnchor.constraint(equalTo: topAnchor, constant: 12),
containerView.bottomAnchor.constraint(equalTo: bottomAnchor),
stackView.topAnchor.constraint(equalTo: containerView.topAnchor, constant: 8.0),
stackView.leadingAnchor.constraint(equalTo: containerView.leadingAnchor, constant: 8.0),
stackView.trailingAnchor.constraint(equalTo: containerView.trailingAnchor, constant: -8.0),
])
containerView.backgroundColor = UIColor.white
/* END CONTAINER VIEW */
// add 10 labels to the stack view
for i in 1...10 {
let v = UILabel()
v.text = "Label \(i)"
v.backgroundColor = .green
stackView.addArrangedSubview(v)
}
}
func insertNew() {
let v = UILabel()
v.text = "New Label"
v.backgroundColor = .cyan
v.translatesAutoresizingMaskIntoConstraints = false
// we're adding a label after 3rd label
stackView.insertArrangedSubview(v, at: 3)
}
}
It starts looking like this:
after tapping the "Insert" button, it looks like this:
Edit
To explain why your current approach isn't working...
Starting with this layout:
each label's Top is constrained to the previous label's Bottom (with constant: spacing).
Those constraints are indicated by the blue arrows.
You then want to "insert" Next Round Label between Round Ends In and Winners Per Round:
Your code:
adds the label
adds a constraint from the Top of Next Round Label to the Bottom of Round Ends In
adds a constraint from the Top of Winners Per Round to the Bottom of Next Round Label
but... Winners Per Round already has a .topAnchor connected to Round Ends In, so it now has two top anchors.
The conflicting constraints are shown in red:
As I said, I think your description of what you're trying to do would lend itself to using stack views, and would make "inserting" views so much easier.
But, if you need to stick with your current "Top-to-Bottom" constraints approach, you have several options.
One - remove all the labels, then re-add and re-constrain them, including the one you're inserting.
Two - track the constraints (using an array or custom object properties) so you can deactivate the conflicting constraint(s).
Three - use some code along the lines of
let theConstraint = containerView.constraints.first(where: {($0.secondItem as? UILabel) == roundEndsInLabel})
to "find" the constraint that needs to be deactivated.
I found a working solution:
First, I declared two helper variables
/* START HELPER VARIABLES */
var numberOfWinnersLabelTopConstraint:NSLayoutConstraint?
var numberOfWinnersLabelValueTopConstraint:NSLayoutConstraint?
/* END HELPER VARIABLES */
then I made some minor adjustments in my setupView function:
private func setupView(frame:CGRect) {
...
/* START NUMBER OF WINNERS PER ROUND LABEL */
numberOfWinnersPerRoundLabel = UILabel()
numberOfWinnersPerRoundLabel.translatesAutoresizingMaskIntoConstraints = false
containerView.addSubview(numberOfWinnersPerRoundLabel)
numberOfWinnersPerRoundLabel.leadingAnchor.constraint(equalTo: currentRoundLabel.leadingAnchor).isActive = true
numberOfWinnersPerRoundLabel.widthAnchor.constraint(equalTo:currentRoundLabel.widthAnchor).isActive = true
// numberOfWinnersPerRoundLabel.topAnchor.constraint(equalTo: roundEndsInLabel.bottomAnchor, constant: frame.height * (19 / IPHONE8_SCREEN_HEIGHT)).isActive = true // Replacing with helper variable
numberOfWinnersLabelTopConstraint = numberOfWinnersPerRoundLabel.topAnchor.constraint(equalTo: roundEndsInLabel.bottomAnchor, constant: frame.height * (19 / IPHONE8_SCREEN_HEIGHT))
numberOfWinnersLabelTopConstraint?.isActive = true
numberOfWinnersPerRoundLabel.text = NSLocalizedString(NUMBER_OF_WINNERS_PER_ROUND_TEXT, comment: "")
numberOfWinnersPerRoundLabel.textColor = .darkGray
numberOfWinnersPerRoundLabel.adjustsFontSizeToFitWidth = true
numberOfWinnersPerRoundLabel.font = .systemFont(ofSize: 12)
/* END NUMBER OF WINNERS PER ROUND LABEL */
/* START NUMBER OF WINNERS PER ROUND LABEL VALUE */
numberOfWinnersPerRoundLabelValue = UILabel()
numberOfWinnersPerRoundLabelValue.translatesAutoresizingMaskIntoConstraints = false
containerView.addSubview(numberOfWinnersPerRoundLabelValue)
numberOfWinnersPerRoundLabelValue.leadingAnchor.constraint(equalTo: currentRoundLabelValue.leadingAnchor).isActive = true
numberOfWinnersPerRoundLabelValue.widthAnchor.constraint(equalTo:currentRoundLabelValue.widthAnchor).isActive = true
// numberOfWinnersPerRoundLabelValue.topAnchor.constraint(equalTo: numberOfWinnersPerRoundLabel.topAnchor).isActive = true // replacing with helper variable
numberOfWinnersLabelValueTopConstraint = numberOfWinnersPerRoundLabelValue.topAnchor.constraint(equalTo: numberOfWinnersPerRoundLabel.topAnchor)
numberOfWinnersLabelValueTopConstraint?.isActive = true
numberOfWinnersPerRoundLabelValue.textColor = .black
/* END NUMBER OF WINNERS PER ROUND LABEL VALUE */
By introducing the helper variables, I could easily deactivate the topConstraint when adding the nextRoundLabel
private func addNextRoundInformation() {
nextRoundLabel = UILabel()
nextRoundLabel.translatesAutoresizingMaskIntoConstraints = false
containerView.addSubview(nextRoundLabel)
nextRoundLabel.leadingAnchor.constraint(equalTo: currentRoundLabel.leadingAnchor).isActive = true
nextRoundLabel.widthAnchor.constraint(equalTo:currentRoundLabel.widthAnchor).isActive = true
nextRoundLabel.topAnchor.constraint(equalTo: roundEndsInLabel.bottomAnchor, constant: frame.height * (19 / IPHONE8_SCREEN_HEIGHT)).isActive = true
nextRoundLabel.text = "Next round starts in"
nextRoundLabel.textColor = .darkGray
nextRoundLabel.font = .systemFont(ofSize: 12)
nextRoundLabelValue = UILabel()
nextRoundLabelValue.translatesAutoresizingMaskIntoConstraints = false
containerView.addSubview(nextRoundLabelValue)
nextRoundLabelValue.leadingAnchor.constraint(equalTo: currentRoundLabelValue.leadingAnchor).isActive = true
nextRoundLabelValue.widthAnchor.constraint(equalTo:currentRoundLabelValue.widthAnchor).isActive = true
nextRoundLabelValue.topAnchor.constraint(equalTo:nextRoundLabel.topAnchor).isActive = true
nextRoundLabelValue.textColor = .black
nextRoundLabelValue.text = "Next round label value"
nextRoundLabelValue.font = .systemFont(ofSize: 14)
}
private func updateNumberOfWinnersLabelConstraint() {
numberOfWinnersLabelTopConstraint?.isActive = false // Deactivate previous constraint
numberOfWinnersLabelValueTopConstraint?.isActive = false
numberOfWinnersLabelTopConstraint = numberOfWinnersPerRoundLabel.topAnchor.constraint(equalTo: nextRoundLabel.bottomAnchor, constant: frame.height * (19 / IPHONE8_SCREEN_HEIGHT))
numberOfWinnersLabelTopConstraint?.isActive = true
numberOfWinnersLabelValueTopConstraint = numberOfWinnersPerRoundLabelValue.topAnchor.constraint(equalTo: nextRoundLabelValue.bottomAnchor, constant: frame.height * (19 / IPHONE8_SCREEN_HEIGHT))
numberOfWinnersLabelValueTopConstraint?.isActive = true
}
Basically, I only had to update the topConstraints of the numberOfWinnersPerRoundLabel and numberOfWinnersPerRoundLabelValue
since everything else would be the same. No changes needed for currentRoundLabel.
I tested it and it worked!
I'm trying to fix an issue with a UItextview which I placed at the bottom of a viewcontroller programmatically and sometimes it can clip through the bottom of the view if I don't set a constraint like so.
https://i.stack.imgur.com/YfyPi.png
Whenever I try to constraint the textview to the bottom of the safe area, the text needlessly expands too much if there's less text.
https://i.stack.imgur.com/8w1v2.png
Here's the relevant code snippets from the textview and the constraints respectively:
private let summaryTextView: UITextView = {
let summaryTextView = UITextView()
summaryTextView.textColor = .label
summaryTextView.backgroundColor = .customWhite
summaryTextView.textAlignment = .center
summaryTextView.font = UIFont.systemFont(ofSize: 24)
summaryTextView.clipsToBounds = true
summaryTextView.layer.cornerRadius = 20
summaryTextView.layer.masksToBounds = true
summaryTextView.isSelectable = false
summaryTextView.isEditable = false
summaryTextView.isScrollEnabled = false
summaryTextView.translatesAutoresizingMaskIntoConstraints = false
return summaryTextView
}()
private func setupConstraints() {
NSLayoutConstraint.activate([
imageContainerView.topAnchor.constraint(equalTo: view.topAnchor, constant: 120),
imageContainerView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 10),
imageContainerView.heightAnchor.constraint(equalToConstant: 280),
imageContainerView.widthAnchor.constraint(equalTo: view.widthAnchor, multiplier: 0.4),
summaryTextView.topAnchor.constraint(equalTo: imageContainerView.bottomAnchor,constant: 15),
summaryTextView.leadingAnchor.constraint(equalTo: view.leadingAnchor,constant: 10),
summaryTextView.trailingAnchor.constraint(equalTo: view.trailingAnchor,constant: -10),
summaryTextView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor)
])
backgroundImage.fillSuperView(to: view)
bookCover.fillSuperView(to: imageContainerView)
}
Any help would be appreciated!
You need to set the height constraint for UITextView(). Because you are giving fixed top anchor and and bottom anchor so it stretches the textview.
I have a UIButton and a UILabel displayed inline. They have different size fonts, however I would like to align them so they appear on the same line.
At the moment the UILabel is slight above the baseline of the UIButton.
I was hoping to avoid manually setting a content offset as I want this to scale correctly where possible. I worry manual calculations may have unexpected side effects on changing font sizes etc.
I have created a playground that should show the 2 elements:
//: A UIKit based Playground for presenting user interface
import UIKit
import PlaygroundSupport
class MyViewController : UIViewController {
lazy var nameButton = configure(UIButton(type: .system), using: {
$0.translatesAutoresizingMaskIntoConstraints = false
$0.titleLabel?.font = .systemFont(ofSize: 18)
$0.setTitleColor(.darkGray, for: .normal)
$0.contentHorizontalAlignment = .leading
$0.setContentHuggingPriority(UILayoutPriority.defaultHigh, for: .horizontal)
$0.backgroundColor = .lightGray
$0.setTitle("This is a button", for: .normal)
})
lazy var publishedDateLabel = configure(UILabel(frame: .zero), using: {
$0.translatesAutoresizingMaskIntoConstraints = false
$0.font = .systemFont(ofSize: 14)
$0.textColor = .darkGray
$0.setContentHuggingPriority(UILayoutPriority.defaultLow, for: .horizontal)
$0.backgroundColor = .lightGray
$0.text = "and this is a label"
})
override func loadView() {
let view = UIView()
view.backgroundColor = .white
[nameButton, publishedDateLabel].forEach(view.addSubview(_:))
NSLayoutConstraint.activate([
nameButton.centerYAnchor.constraint(equalTo: view.centerYAnchor),
nameButton.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 8),
publishedDateLabel.centerYAnchor.constraint(equalTo: view.centerYAnchor),
publishedDateLabel.leadingAnchor.constraint(equalTo: nameButton.trailingAnchor),
publishedDateLabel.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -8)
])
self.view = view
}
// setup helper method
func configure<T>(_ value: T, using closure: (inout T) throws -> Void) rethrows -> T {
var value = value
try closure(&value)
return value
}
}
// Present the view controller in the Live View window
PlaygroundPage.current.liveView = MyViewController()
I have tried making the label and button the same height by adding publishedDateLabel.heightAnchor.constraint(equalTo: nameButton.heightAnchor)
This didn't change the alignment however.
I also tried using publishedDateLabel.lastBaselineAnchor.constraint(equalTo: nameButton.lastBaselineAnchor)
to align the anchors however this aligned the top of the elements
How can align the bottom of the text in the button to the bottom of the text in the label?
Just comment out the heightAnchor use the lastBaselineAnchor:
NSLayoutConstraint.activate([
nameButton.centerYAnchor.constraint(equalTo: view.centerYAnchor),
nameButton.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 8),
publishedDateLabel.lastBaselineAnchor.constraint(equalTo: nameButton.lastBaselineAnchor),
publishedDateLabel.leadingAnchor.constraint(equalTo: nameButton.trailingAnchor),
publishedDateLabel.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -8)
])
I have written a function that defines and adds a UILabel to the UIView - however the constraints are not being executed as the label remains in the top left corner of the screen.
Heres the code:
func timeAdded(screenHeight: CGFloat, screenWidth: CGFloat, viewController: UIView) {
let readyLabel = UILabel()
readyLabel.backgroundColor = UIColor.white
readyLabel.textAlignment = .center
readyLabel.text = "00:00"
readyLabel.textColor = UIColor.blue
//readyLabel.alpha = 0
readyLabel.font = UIFont(name: "panl-font-4", size: 60)
readyLabel.sizeToFit()
viewController.addSubview(readyLabel)
readyLabel.centerXAnchor.constraint(equalTo: viewController.centerXAnchor, constant: 0).isActive = true
readyLabel.centerYAnchor.constraint(equalTo: viewController.centerYAnchor, constant: 0).isActive = true
}
Any advice appreciated
You may need
readyLabel.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([
readyLabel.centerXAnchor.constraint(equalTo: viewController.centerXAnchor)
readyLabel.centerYAnchor.constraint(equalTo: viewController.centerYAnchor)
])
So it's better to read This
I am trying to write a simple composite component for iOS in Swift 3. It consists of a UILabel followed by an UITextField laid out horizontally followed by a line under them. But What happens is the UILabel disappears, UITextField appears on the parent view and line also disappears.
My design in sketch
What it actually looks like in the Storyboard
My component's constraints in the view controller
My intention was to use Auto Layout, anchor the label to top and leading anchors of the view, anchor the textfield to top of the view and trailing anchor of the label with a constant, so they would appear side by side.
I did do a lot of research on this, one site that looked pretty close to what I wanted was https://www.raywenderlich.com/125718/coding-auto-layout, and I think I am following more or less the same approach.
I am doing something obviously wrong, but can't figure out what. Any help is much appreciated, I have been at this for a few days now.
import UIKit
#IBDesignable
class OTextEdit: UIView {
#IBInspectable var LabelText: String = "Label"
#IBInspectable var SecureText: Bool = false
#IBInspectable var Color: UIColor = UIColor.black
#IBInspectable var Text: String = "" {
didSet {
edit.text = Text
}
}
fileprivate let label = UILabel(frame: CGRect(x: 0, y: 0, width: 200, height: 35))
fileprivate let edit = UITextField(frame: CGRect(x: 210, y: 0, width: 200, height: 35))
fileprivate let line: UIView = UIView()
override var intrinsicContentSize: CGSize {
return CGSize(width: 300, height: 100)
}
func setup() {
label.text = LabelText
label.textColor = Color
label.font = UIFont(name: "Avenir Next Condensed", size: 24)
edit.font = UIFont(name: "Avenir Next Condensed", size: 24)
edit.borderStyle = .roundedRect
edit.isSecureTextEntry = SecureText
line.backgroundColor = UIColor.white
self.addSubview(label)
self.addSubview(edit)
self.addSubview(line)
}
override func willMove(toSuperview newSuperview: UIView?) {
super.willMove(toSuperview: newSuperview)
setup()
setupConstaints()
}
func setupConstaints() {
label.translatesAutoresizingMaskIntoConstraints = false
edit.translatesAutoresizingMaskIntoConstraints = false
line.translatesAutoresizingMaskIntoConstraints = false
label.leadingAnchor.constraint(equalTo: leadingAnchor, constant: -10).isActive = true
label.topAnchor.constraint(equalTo: topAnchor)
edit.leadingAnchor.constraint(equalTo: label.leadingAnchor, constant: 10).isActive = true
edit.trailingAnchor.constraint(equalTo: self.trailingAnchor, constant: -20).isActive = true
edit.topAnchor.constraint(equalTo: self.topAnchor)
line.heightAnchor.constraint(equalToConstant: 2.0).isActive = true
line.leadingAnchor.constraint(equalTo: self.leadingAnchor, constant: 10).isActive = true
line.trailingAnchor.constraint(equalTo: self.trailingAnchor, constant: -20).isActive = true
line.topAnchor.constraint(equalTo: label.bottomAnchor, constant: 1.0).isActive = true
}
}
You haven't got a series of constraints top to bottom, so auto layout can't determine the content size of your object. You have tried to set this via the initrinsicContentSize but you shouldn't need to do this.
You also need to set a horizontal hugging priority for your label to let auto layout know that you want the text field to expand:
I removed your override of intrinsicContentSize and changed your constraints to:
Constrain the bottom of the label to the top of the line
Constrain the bottom of the line to the bottom of the superview
Constrain the baseline of the label to the baseline of the text field
Remove the constraint between the top of the text field and the superview
Set the horizontal hugging priority of the label.
func setupConstraints() {
label.translatesAutoresizingMaskIntoConstraints = false
edit.translatesAutoresizingMaskIntoConstraints = false
line.translatesAutoresizingMaskIntoConstraints = false
label.leadingAnchor.constraint(equalTo: leadingAnchor, constant: 10).isActive = true
label.setContentHuggingPriority(.defaultHigh, for: .horizontal)
label.topAnchor.constraint(equalTo: topAnchor)
label.bottomAnchor.constraint(equalTo: line.topAnchor, constant: -8).isActive = true
edit.leadingAnchor.constraint(equalTo: label.trailingAnchor, constant: 10).isActive = true
edit.trailingAnchor.constraint(equalTo: self.trailingAnchor, constant: -20).isActive = true
edit.firstBaselineAnchor.constraint(equalTo: label.firstBaselineAnchor).isActive = true
line.heightAnchor.constraint(equalToConstant: 2.0).isActive = true
line.leadingAnchor.constraint(equalTo: self.leadingAnchor, constant: 10).isActive = true
line.trailingAnchor.constraint(equalTo: self.trailingAnchor, constant: -20).isActive = true
line.topAnchor.constraint(equalTo: label.bottomAnchor, constant: 1.0).isActive = true
line.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true
}
I think it is pretty close to what you are after.