I want the UIStackView to resize to fit their subviews (UIImageView and UILabel in this case)
let headerView = UIStackView()
headerView.axis = .vertical
headerView.alignment = .center
headerView.distribution = .equalSpacing
headerView.spacing = 10
let headerImage = UIImageView(...)
headerImage.contentMode = .scaleAspectFill
headerImage.clipsToBounds = true
headerImage.frame = CGRect(x: 0, y: 0, width: tableView.frame.width, height: tableView.frame.width / 1.618)
let desciptionView = UILabel()
desciptionView.text = "Some very long text wrapping multiple lines..."
desciptionView.numberOfLines = 0
desciptionView.font = UIFont.preferredFont(forTextStyle: UIFontTextStyle.body)
headerView.addArrangedSubview(headerImage)
headerView.addArrangedSubview(desciptionView)
print(headerView.bounds) // always 0,0,0,0
print(headerView.frame) // always 0,0,0,0
tableView.tableHeaderView = headerView
(in this code height and width are 0)
How to implement the wanted behaviour?
The only way I have found to do this is by setting the content hugging and compression resistance priorities of the child views to be required, something like this:
let arrangedViews = [filterLabel, image]
.map { (view: UIView) -> UIView in
view.setContentHuggingPriority(.required, for: .horizontal)
view.setContentCompressionResistancePriority(.required, for: .horizontal)
return view }
let stack = UIStackView(arrangedSubviews: arrangedViews)
stack.axis = .horizontal
stack.distribution = .fill
stack.spacing = 8
With those set on the arranged subviews, do you do indeed (or at least I did) get the desired result.
Related
So, I added some text (UITextView) to my stackView and centered to the top. I also added a UIImageView which would sit nicely under my UITextView. Well it doesn't. For some reason the image covers the text completely. If I delete the image the text comes back up nice on the top center. Played a lot with the stack distribution and alignment but no luck. Not sure what I'm missing :(. Any help is appreciated!
I'm adding both the UITextView and UIIMageView as arrangedSubview to the stack.
Here is my code:
//stack
let stack: UIStackView = {
let stack = UIStackView()
stack.translatesAutoresizingMaskIntoConstraints = false
stack.axis = .vertical
stack.spacing = 5
stack.distribution = .fillProportionally
stack.alignment = .fill
return stack
}()
//text
fileprivate let title: UITextView = {
let title = UITextView()
title.translatesAutoresizingMaskIntoConstraints = false
title.contentMode = .scaleAspectFit
title.layer.cornerRadius = 10
title.backgroundColor = .darkGray
title.font = UIFont(name: "Megrim-Regular", size: 17)
title.textColor = .white
title.textAlignment = .center
return title
}()
//image
let image: UIImageView = {
let image = UIImageView()
image.image = UIImage(named: "demoPic.jpg")
image.translatesAutoresizingMaskIntoConstraints = false
image.frame = CGRect(x: 0, y: 0, width: 50, height: 50)
return image
}()
Hope this below may help,
I think your issue is relating to constraints applied to the stackview and the holder view. (See below)
Your UI Elements (TextView & Image) code seems to be fine (maybe the image will not be work with 50 width /50 height inside this particular stack view configuration. It will require a different approach IMO.
Nevertheless on my playground in order to see it, I just applied 2 constraints towards my container view in order to see your TextView well above your ImageView as you wanted.
Here is the playground I used to reproduce your issue, you can copy and paste it to see if it fits what you request.
import UIKit
import PlaygroundSupport
/// DEMO VIEW CLASS
final class DemoView: UIView {
override init(frame: CGRect) {
super.init(frame: frame)
backgroundColor = .white
}
required init?(coder aDecoder: NSCoder) { fatalError("init(coder:) has not been implemented")
}
}
// YOUR UI CODE
//stack
let stack: UIStackView = {
let stack = UIStackView()
stack.translatesAutoresizingMaskIntoConstraints = false
stack.axis = .vertical
stack.spacing = 5
stack.distribution = .fillProportionally
stack.alignment = .fill
return stack
}()
//text
fileprivate let title: UITextView = {
let title = UITextView()
title.translatesAutoresizingMaskIntoConstraints = false
title.contentMode = .scaleAspectFit
title.layer.cornerRadius = 10
title.backgroundColor = .darkGray
title.font = UIFont(name: "Megrim-Regular", size: 17)
title.text = "TextView"
title.textColor = .white
title.textAlignment = .center
return title
}()
//image
let image: UIImageView = {
let image = UIImageView()
image.backgroundColor = .red
image.translatesAutoresizingMaskIntoConstraints = false
image.frame = CGRect(x: 0, y: 0, width: 50, height: 50)
return image
}()
// PLAYGROUND DEMO VIEW TO HOLD YOUR STACK VIEW
let demoView = DemoView(frame: CGRect(x: 0, y: 0, width: 350, height: 150))
stack.addArrangedSubview(title)
stack.addArrangedSubview(image)
demoView.addSubview(stack)
demoView.addConstraints(
NSLayoutConstraint.constraints(withVisualFormat: "H:|-0-[stackView]-0-|",
options: NSLayoutConstraint.FormatOptions(rawValue: 0),
metrics: nil,
views: ["stackView": stack])
)
demoView.addConstraints(
NSLayoutConstraint.constraints(withVisualFormat: "V:|-0-[stackView]-0-|",
options: NSLayoutConstraint.FormatOptions(rawValue: 0),
metrics: nil,
views: ["stackView": stack])
)
PlaygroundPage.current.liveView = demoView
Results: Your Text View is above the image center (ImageView just have a RED Background here).
I' struggling with some basic UIStackView distribution and alignment stuff.
I have an UICollectionViewCell which has a horizontal UIStackView at the contentView subview. This UIStackView has a vertical UIStackView for the three labels itself, and of course the UIImageView.
This is the code snippet for the screenshot below:
func createSubViews() {
// contains the UIStackview with the 3 labels and the UIImageView
containerStackView = UIStackView()
containerStackView.axis = .horizontal
containerStackView.distribution = .fill
containerStackView.alignment = .top
contentView.addSubview(containerStackView)
// the UIStackView for the labels
verticalStackView = UIStackView()
verticalStackView.axis = .vertical
verticalStackView.distribution = .fill
verticalStackView.spacing = 10.0
containerStackView.addArrangedSubview(verticalStackView)
categoryLabel = UILabel()
categoryLabel.font = UIFont.preferredFont(forTextStyle: .caption1)
categoryLabel.textColor = UIColor.lightGray
verticalStackView.addArrangedSubview(categoryLabel)
titleLabel = UILabel()
titleLabel.numberOfLines = 3
titleLabel.lineBreakMode = .byWordWrapping
verticalStackView.addArrangedSubview(titleLabel)
timeLabel = UILabel()
timeLabel.font = UIFont.preferredFont(forTextStyle: .caption1)
timeLabel.textColor = UIColor.lightGray
verticalStackView.addArrangedSubview(timeLabel)
// UIImageView
imageView = UIImageView()
imageView.contentMode = .scaleAspectFill
imageView.clipsToBounds = true
imageView.layer.cornerRadius = 5
layer.masksToBounds = true
containerStackView.addArrangedSubview(imageView)
}
What I want to achive is, that the "time label" ("3 days ago") is always placed at the bottom of each UICollectionViewCell (aligned with the bottom of the UIImageView), regardless of the different title label lines.
I've played with various UIStackView distributions, constraining the "time label" and with the hugging priority of the "title label".
But anyhow I can't get it right. Any hints?
UPDATE
Since you're setting titleLabel.numberOfLines = 3, one way to do this is simply to append three newlines to the title text. That will force titleLabel to always consume its full height of three lines, forcing timeLabel to the bottom.
That is, when you set titleLabel.text, do it like this:
titleLabel.text = theTitle + "\n\n\n"
ORIGINAL
If you let one of the labels stretch vertically, the stretched label's text will be centered vertically within the stretched label's bounds, which is not what you want. So we can't let the labels stretch vertically. Therefore we need to introduce a padding view that can stretch but is otherwise invisible.
If the padding view gets squeezed down to zero height, the stack view will still put spacing before and after it, leading to double-spacing between titleLabel and timeLabel, which you also don't want.
So we'll need to implement all the spacing using padding views. Change verticalStackView.spacing to 0.
Add a generic UIView named padding1 to verticalStackView after categoryLabel, before titleLabel. Constrain its height to equal 10.
Add a generic UIView named padding2 to verticalStackView after titleLabel, before timeLabel. Constrain its height to greater than or equal to 10 so that it can stretch.
Set the vertical hugging priorities of categoryLabel, titleLabel, and timeLabel to required, so that they will not stretch vertically.
Constrain the height of verticalStackView to the height of containerStackView so that it will stretch one or more of its arranged subviews if needed to fill the vertical space available. The only arranged subview that can stretch is padding2, so it will stretch, keeping the title text near the top and the time text at the bottom.
Also, constrain your containerStackView to the bounds of contentView and set containerStackView.translatesAutoresizingMaskIntoConstraints = false.
Result:
Here's my playground:
import UIKit
import PlaygroundSupport
class MyCell: UICollectionViewCell {
var containerStackView: UIStackView!
var verticalStackView: UIStackView!
var categoryLabel: UILabel!
var titleLabel: UILabel!
var timeLabel: UILabel!
var imageView: UIImageView!
func createSubViews() {
// contains the UIStackview with the 3 labels and the UIImageView
containerStackView = UIStackView()
containerStackView.axis = .horizontal
containerStackView.distribution = .fill
containerStackView.alignment = .top
contentView.addSubview(containerStackView)
// the UIStackView for the labels
verticalStackView = UIStackView()
verticalStackView.axis = .vertical
verticalStackView.distribution = .fill
verticalStackView.spacing = 0
containerStackView.addArrangedSubview(verticalStackView)
categoryLabel = UILabel()
categoryLabel.font = UIFont.preferredFont(forTextStyle: .caption1)
categoryLabel.textColor = UIColor.lightGray
verticalStackView.addArrangedSubview(categoryLabel)
let padding1 = UIView()
verticalStackView.addArrangedSubview(padding1)
titleLabel = UILabel()
titleLabel.numberOfLines = 3
titleLabel.lineBreakMode = .byWordWrapping
verticalStackView.addArrangedSubview(titleLabel)
let padding2 = UIView()
verticalStackView.addArrangedSubview(padding2)
timeLabel = UILabel()
timeLabel.font = UIFont.preferredFont(forTextStyle: .caption1)
timeLabel.textColor = UIColor.lightGray
verticalStackView.addArrangedSubview(timeLabel)
// UIImageView
imageView = UIImageView()
imageView.contentMode = .scaleAspectFill
imageView.clipsToBounds = true
imageView.layer.cornerRadius = 5
layer.masksToBounds = true
containerStackView.addArrangedSubview(imageView)
categoryLabel.setContentHuggingPriority(.required, for: .vertical)
titleLabel.setContentHuggingPriority(.required, for: .vertical)
timeLabel.setContentHuggingPriority(.required, for: .vertical)
imageView.setContentHuggingPriority(.defaultHigh, for: .horizontal)
containerStackView.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([
contentView.leadingAnchor.constraint(equalTo: containerStackView.leadingAnchor),
contentView.trailingAnchor.constraint(equalTo: containerStackView.trailingAnchor),
contentView.topAnchor.constraint(equalTo: containerStackView.topAnchor),
contentView.bottomAnchor.constraint(equalTo: containerStackView.bottomAnchor),
verticalStackView.heightAnchor.constraint(equalTo: containerStackView.heightAnchor),
padding1.heightAnchor.constraint(equalToConstant: 10),
padding2.heightAnchor.constraint(greaterThanOrEqualToConstant: 10),
])
}
}
let cell = MyCell(frame: CGRect(x: 0, y: 0, width: 320, height: 110))
cell.backgroundColor = .white
cell.createSubViews()
cell.categoryLabel.text = "MY CUSTOM LABEL"
cell.titleLabel.text = "This is my title"
cell.timeLabel.text = "3 days ago"
cell.imageView.image = UIGraphicsImageRenderer(size: CGSize(width: 110, height:110)).image { (context) in
UIColor.blue.set()
UIRectFill(.infinite)
}
PlaygroundPage.current.liveView = cell
The problem is the vertical stack view. You apparently want to say: the middle label's top should hug the MyCustomLabel bottom, but the 3 Days Ago bottom should hug the overall bottom. That is not something you can say to a stack view.
And even if that is not what you want to say, you would still need to make the vertical stack view take on the full height of the cell, and how are you going to do that? In the code you showed, you don't do that at all; in fact, your stack view has zero size based on that code, which will lead to all sorts of issues.
I would suggest, therefore, that you just get rid of all the stack views and just configure the layout directly. Your layout is an easy one to configure using autolayout constraints.
I have a UIStackView which needs a background color in one of the stacks, so I placed a UIView inside, but the UIView is never displayed. The UIView currently has one subview, a UILabel, but should eventually have another UIStackView instead. If I display the UILabel as a direct child of the UIStackView, rather than the UIView, then the UILabel displays properly. So, what constraints are missing or wrong on my UIView?
let stack = UIStackView()
stack.axis = .Vertical
stack.alignment = .Leading
stack.distribution = .EqualCentering
stack.spacing = 0
let width = UIScreen.mainScreen().bounds.size.width
let frame = CGRect(x: 0, y: 0, width: width, height: 50)
let viewHolder = UIView(frame: frame)
viewHolder.backgroundColor = blueColor
//Needs a blue background
let name = UILabel()
name.text = nameText
name.textColor = yellowColor
name.backgroundColor = blueColor
name.font = UIFont.boldSystemFontOfSize(32.0)
let address = UILabel()
address.text = addressText
let dateTime = UILabel()
dateTime.text = calString
viewHolder.addSubview(name)
stack.addArrangedSubview(viewHolder)
stack.addArrangedSubview(address)
stack.addArrangedSubview(dateTime)
self.stackView.addArrangedSubview(stack)
And when run it produces this:
If I remove the UIView from the equation, ie:
let stack = UIStackView()
stack.axis = .Vertical
stack.alignment = .Leading
stack.distribution = .EqualCentering
stack.spacing = 0
let width = UIScreen.mainScreen().bounds.size.width
let frame = CGRect(x: 0, y: 0, width: width, height: 50)
let viewHolder = UIView(frame: frame)
viewHolder.backgroundColor = blueColor
//Needs a blue background
let name = UILabel()
name.text = nameText
name.textColor = yellowColor
name.backgroundColor = blueColor
name.font = UIFont.boldSystemFontOfSize(32.0)
let address = UILabel()
address.text = addressText
let dateTime = UILabel()
dateTime.text = calString
//viewHolder.addSubview(name)
stack.addArrangedSubview(name) //Add the label directly to the UIStackView
stack.addArrangedSubview(address)
stack.addArrangedSubview(dateTime)
self.stackView.addArrangedSubview(stack)
I get:
I just need the blue part to stretch across the screen
So, answer is, don't use UIStackView. Use the built in UITableView for this kind of layout.
navigationItem.hidesBackButton = true
navigationItem.leftBarButtonItem = nil
head = UIView()
head.frame = CGRectMake(0, 0, 200, 44)
head.frame.origin.x = CGFloat(0)
navigationItem.titleView = head
I attempt to align the titleView to the left, but it still remains in the middle.
Try this:
let title = UILabel()
title.text = "TITLE"
let spacer = UIView()
let constraint = spacer.widthAnchor.constraint(greaterThanOrEqualToConstant: CGFloat.greatestFiniteMagnitude)
constraint.isActive = true
constraint.priority = .defaultLow
let stack = UIStackView(arrangedSubviews: [title, spacer])
stack.axis = .horizontal
navigationItem.titleView = stack
The idea is that main view (in this case title) will take all the space it needs and spacer view will take all the free space left.
I figured it out.
I just need to set my custom UIView as the leftBarButtonItem.
I had a similar requirement of adding the Title along with the subtitle to the left of the navbar. I couldn't achieve it with a TitleView since it cannot be aligned left.
So I took #TIMEZ and #Wain's answers, along with responses from the thread here and added a complete answer, in case it helps anyone :
let titleLabel = UILabel()
titleLabel.text = "Pillars"
titleLabel.textAlignment = .center
titleLabel.font = .preferredFont(forTextStyle: UIFont.TextStyle.headline)
let subtitleLabel = UILabel()
subtitleLabel.text = "How did you do today?"
subtitleLabel.textAlignment = .center
subtitleLabel.font = .preferredFont(forTextStyle: UIFont.TextStyle.subheadline)
let stackView = UIStackView(arrangedSubviews: [titleLabel, subtitleLabel])
stackView.distribution = .equalSpacing
stackView.alignment = .leading
stackView.axis = .vertical
let customTitles = UIBarButtonItem.init(customView: stackView)
self.navigationItem.leftBarButtonItems = [customTitles]
You can't align a title view to the left. You can create a title view and add a subview positioned to its left. If you're looking to display in place of the back button then you should be using a bar button item instead of title view.
I don't think Apple wants you to do that. Navigation bars have a pretty specific purpose that often involves having something else in the top left corner like a Back button. You might be better off making a custom UIView or UIToolbar that looks like the navigation bar.
If it's a custom UIView, override intrinsicContentSize and return
CGSize(width: .greatestFiniteMagnitude, height: UIView.noIntrinsicMetric)
This will stretch the view to the entire width between left and right bar button items.
You can constraint the titleView to the navigationBars leftAnchor.
private func setupNavigationBarTitleView() {
let titleView = YourCustomTitleView()
navigationBarTitleView = titleView
navigationBarTitleView?.translatesAutoresizingMaskIntoConstraints = false
navigationItem.titleView = navigationBarTitleView
if let navigationBar = navigationController?.navigationBar {
NSLayoutConstraint.activate([
titleView.leadingAnchor.constraint(equalTo: navigationBar.leadingAnchor, constant: 16),
titleView.heightAnchor.constraint(equalToConstant: 36)
])
}
}
The simplest solution is to add low priority constraint for title width.
let titleLabel = UILabel()
titleLabel.textAlignment = .left
...
let c = titleLabe.widthAnchor.constraint(equalToConstant: 10000)
c.priority = .required - 1
c.isActive = true
navigationItem.titleView = titleLabel
Hey guys after trying most of the solutions above. I found that most of em still did not meet my prod requirements. Here is a solution I came up with after trying out different solutions.
func setLeftAlignTitleView(font: UIFont, text: String, textColor: UIColor) {
guard let navFrame = navigationController?.navigationBar.frame else{
return
}
let parentView = UIView(frame: CGRect(x: 0, y: 0, width: navFrame.width*3, height: navFrame.height))
self.navigationItem.titleView = parentView
let label = UILabel(frame: .init(x: parentView.frame.minX, y: parentView.frame.minY, width: parentView.frame.width, height: parentView.frame.height))
label.backgroundColor = .clear
label.numberOfLines = 2
label.font = font
label.textAlignment = .left
label.textColor = textColor
label.text = text
parentView.addSubview(label)
}
let navLabel = UILabel(frame: CGRect(x: 0, y: 0, width: view.frame.width - 32, height: view.frame.height))
navLabel.text = "Hi, \(CurrentUser.firstName)"
navLabel.textColor = UIColor.white
navLabel.font = UIFont.systemFont(ofSize: 20)
navigationItem.titleView = navLabel
I want to add several multiline Labels to an UIStackView.
But I always end up my Labels being truncated. As seen in this Screenshot
But I like to have it more as shown here (my faked Screenshot)
Here is my Code. First I create the parent/master StackView, put it into an ScrollView (which is tucked to the screen)
stackView = UIStackView()
stackView.axis = .Vertical
stackView.distribution = .Fill
stackView.spacing = 2
stackView.translatesAutoresizingMaskIntoConstraints = false
scrollView.addSubview(stackView)
NSLayoutConstraint.activateConstraints(stackConstraints)
let s1 = createHeaderStackView()
stackView.insertArrangedSubview(s1, atIndex: 0)
let lbl2 = makeLabel()
lbl2.text = "Second One"
stackView.insertArrangedSubview(lbl2, atIndex: 1)
scrollView.setNeedsLayout()
while makeLabel and makeButton are just helper functions
func makeButton() -> UIButton {
let btn = UIButton(type: .Custom)
btn.backgroundColor = UIColor.lightGrayColor()
return btn
}
func makeLabel() -> UILabel {
let lbl = UILabel()
lbl.font = UIFont.systemFontOfSize(18)
lbl.setContentCompressionResistancePriority(1000, forAxis: .Vertical)
lbl.setContentHuggingPriority(10, forAxis: .Vertical)
lbl.preferredMaxLayoutWidth = scrollView.frame.width
lbl.numberOfLines = 0
lbl.textColor = UIColor.blackColor()
lbl.backgroundColor = UIColor.redColor()
return lbl
}
The createHeaderStackViewmethod is to configure my StackView to put inside a StackView with all my header stuff.
func createHeaderStackView() -> UIStackView {
let lblHeader = makeLabel()
lblHeader.text = "UIStackView"
lblHeader.textAlignment = .Center
let lblInfo = makeLabel()
lblInfo.text = "This is a long text, over several Lines. Because why not and am able to to so, unfortunaltey Stackview thinks I'm not allowed."
lblInfo.textAlignment = .Natural
lblInfo.layoutIfNeeded()
let lblInfo2 = makeLabel()
lblInfo2.text = "This is a seconds long text, over several Lines. Because why not and am able to to so, unfortunaltey Stackview thinks I'm not allowed."
lblInfo2.textAlignment = .Natural
lblInfo2.layoutIfNeeded()
let btnPortal = makeButton()
btnPortal.setTitle("My Button", forState: .Normal)
btnPortal.addTarget(self, action: "gotoPushWebPortalAction", forControlEvents: .TouchUpInside)
let headerStackView = UIStackView(arrangedSubviews: [lblHeader, btnPortal, lblInfo, lblInfo2])
headerStackView.axis = .Vertical
headerStackView.alignment = .Center
headerStackView.distribution = .Fill
headerStackView.spacing = 2
headerStackView.setContentCompressionResistancePriority(1000, forAxis: .Vertical)
headerStackView.setContentHuggingPriority(10, forAxis: .Vertical)
headerStackView.setNeedsUpdateConstraints()
headerStackView.setNeedsLayout()
//headerStackView.layoutMarginsRelativeArrangement = true
return headerStackView
}
so to make a long story short: What is needed to adjust my stackviews, so each stackview and therefore label is shown in full glorious size? I tried to compress and hug everything, but it didn't seem to work. And googling uistackview uilabel multiline truncated seems to be a dead end, too
I appreciate any help,
regards Flori
You have to specify the dimensions of the stack view. The label will not "overflow" into the next line if the dimensions of the stack view is ambiguous.
This code is not exactly the output you'd want, but you'll get the idea:
override func viewDidLoad() {
super.viewDidLoad()
let stackView = UIStackView()
stackView.axis = .Vertical
stackView.distribution = .Fill
stackView.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(stackView)
let views = ["stackView" : stackView]
let h = NSLayoutConstraint.constraintsWithVisualFormat("H:|-50-[stackView]-50-|", options: [], metrics: nil, views: views)
let w = NSLayoutConstraint.constraintsWithVisualFormat("V:|-100-[stackView]-50-|", options: [], metrics: nil, views: views)
view.addConstraints(h)
view.addConstraints(w)
let lbl = UILabel()
lbl.preferredMaxLayoutWidth = stackView.frame.width
lbl.numberOfLines = 0
lbl.text = "asddf jk;v ijdor vlb otid jkd;io dfbi djior dijt ioure f i;or dfuu;nfg ior mf;drt asddf jk;v ijdor vlb otid jkd;io dfbi djior dijt ioure f infg ior mf;drt asddf jk;v ijdor vlb otid jkd;io dfbi djior dijt ioure f i;or dfuu;nfg ior mf;drt "
dispatch_async(dispatch_get_main_queue(), {
stackView.insertArrangedSubview(lbl, atIndex: 0)
})
}
As per I know If you are using this inside UITableViewCell then each rotation you have to reload tableView.
You can use stackView.distribution = .fillProportionally it will work fine.
You should try this on storyboard.
make the stackview height as equal to 60% or 70% of your view.
Make the multiplier as 0.6 or 0.7.