I'm trying to reorder an image and a stackview (here called labelsStack) that are both contained in another stackview (here called stack). My goald would be to programatically reverse the index order of both subviews in order to change their postition at runtime (they are horizontally distributed, so theorically, if I reorder their indexes, it should reorder them in autolayout)
I have tried to update indexes, exchange subviews, sendViewForward etc from the Apple doc, but it doesn t work, here s the code of my tableViewCell :
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func layoutSubviews() {
cellImage.layer.cornerRadius = cellImage.bounds.height / 3
cellImage.clipsToBounds = true
if incoming {
} else {
// as one of the many methods that didn't work
self.stack.insertSubview(cellImage, belowSubview: labelsStack)
}
}
You could create two alternative sets of constraints, one for the default order and the other for the inverse order. The default constraints are the one ending in 1
To initially deactivate the alternative setting you can use the inspector and change the installed checkbox
Your view controller should now have 6 outlets:
#IBOutlet weak var topViewTopConstraint1: NSLayoutConstraint!
#IBOutlet weak var bottomViewTopConstraint1: NSLayoutConstraint!
#IBOutlet weak var bottomViewBottomConstraint1: NSLayoutConstraint!
#IBOutlet weak var topViewTopConstraint2: NSLayoutConstraint!
#IBOutlet weak var bottomViewTopConstraint2: NSLayoutConstraint!
#IBOutlet weak var topViewBottomConstraint2: NSLayoutConstraint!
now to activate the other set of constraints you can use:
self.topViewBottomConstraint2.active = true
self.topViewTopConstraint2.active = true
self.bottomViewTopConstraint2.active = true
self.topViewTopConstraint1.active = false
self.bottomViewBottomConstraint1.active = false
self.bottomViewTopConstraint1.active = false
and viceversa
Related
I'm trying to cope with iPhone X with inputAccessoryView. I've added a view to my ViewController like so:
CustomView
I've defined an outlet and attached to it. Returned the same view as inputAccessoryView like so:
class ViewController: UIViewController {
#IBOutlet weak var textFieldContainer: UIView!
override var inputAccessoryView: UIView? {
return textFieldContainer
}
override var canBecomeFirstResponder: Bool {
return true
}
override func viewDidLoad() {
super.viewDidLoad()
textFieldContainer.autoresizesSubviews = true
}
}
I've made sure to add constraints relative to safe area. Here are my constraints:
Constraints
Adjusted autoResizingMask in SB like so:
AutoResizingMask
However, it's still not working. Here's the output:
Output
What did I miss?
Unlike for table view cells, there is no support for dynamic height calculation in input accessory views, as far as I know.
You could use a fixed height for the accessory view.
But I assume, that you want just to change either top, bottom, or height constraint in interface builder and the change is reflected after the next build.
What you could do is, to use a custom view class where you connect your top, bottom and height constraints.
Then override intrinsicContentSize and return the sum of the three constraint constants.
class TextFieldContainer: UIView {
#IBOutlet weak var topConstraint: NSLayoutConstraint!
#IBOutlet weak var bottomConstraint: NSLayoutConstraint!
#IBOutlet weak var heightConstraint: NSLayoutConstraint!
override var intrinsicContentSize: CGSize {
let contentHeight =
self.topConstraint.constant
+ self.heightConstraint.constant
+ self.bottomConstraint.constant
return CGSize(width: UIScreen.main.bounds.width, height: contentHeight)
}
}
Your layout hierarchy could be simplified and look like this:
The autoresizing mask could look like this:
The final result would behave like the following then:
You're giving textfield height and also bottom constraint, try to remove bottom constraint for textfield
These are my codes
//My UIViews
#IBOutlet weak var UIVIewFirst: UIView!
#IBOutlet weak var UIViewSecond: UIView!
#IBOutlet weak var UIViewThird: UIView!
#IBOutlet weak var middleViewHeightConstraint: NSLayoutConstraint!
#IBOutlet weak var ViewThirdHeight: NSLayoutConstraint!
There is a button to show and hide the view as;
#IBAction func infoClicked(sender: SSRadioButton) {
if UIViewSecond.hidden {
sender.selected = false
UIViewSecond.hidden = false
self.middleViewHeightConstraint.constant = 134
} else {
sender.selected = true
UIViewSecond.hidden = true
self.middleViewHeightConstraint.constant = 0
self.ViewThirdHeight.constant = 180
}
}
the vertical gap between each view is 10. After hiding the view the gap becomes 20. But i need it to set it 10 between third and second view. Even though i set the third view height constant to any number it does not changes it position.Can anyone suggest why is this happening??
Constraints ignore the hidden property.
If possible for your requirements, embedd your views within a UIStackView.
See this example.
You need to take the outlet connection of the vertical spacing constraint between either First-Second or Second-Third views. Also if you want to hide/show only Second view, you don't need to do any changes to Third View height constraint.
Say For example, we take the outlet of vertical spacing between First and Second views, then:
#IBOutlet weak var UIVIewFirst: UIView!
#IBOutlet weak var UIViewSecond: UIView!
#IBOutlet weak var middleViewHeightConstraint: NSLayoutConstraint!
#IBOutlet weak var verticalSpacingConstraint: NSLayoutConstraint!
#IBAction func infoClicked(sender: UIButton)
{
if UIViewSecond.hidden
{
sender.selected = false
UIViewSecond.hidden = false
self.middleViewHeightConstraint.constant = 134
self.verticalSpacingConstraint.constant = 10
}
else
{
sender.selected = true
UIViewSecond.hidden = true
self.middleViewHeightConstraint.constant = 0
self.verticalSpacingConstraint.constant = 0
}
}
Below are the screenshots of output:
1. When button is not selected
2. When button is selected
You have not tell your view to update the view with the new constraint, you have to call this code:
self.view.layoutIfNeeded()
firstView
| gap = 10
secondView
| gap = 10
thirdView
after removing secondView
firstView
| gap = 10
---------- height = 0
| gap = 10
thirdView
so the gap becomes 20
try to add constraint programmatically after hiding the view or decrease any one gap.
Try to change the frame of the view instead of changing the constraint, also do view.layoutIfNeeded after making any changes.
I am trying to create round corners for a UIView with in a custom TableViewCell. The problem is when the table view loads, it only rounds the Top Left corner of the view and not the bottom one. Now when i scroll the table view little bit, it rounds the bottom left part of the view as well.
I have tried every possible method but i can't get my head around it. I am also attaching the screenshots as well as copying the code. Thanks
The code that i am using in the custom view cell class is below.
class FoodTVCell: UITableViewCell {
var food: Food!
#IBOutlet weak var foodPicture: UIImageView!
#IBOutlet weak var foodName: UILabel!
#IBOutlet weak var foodRating: UIImageView!
#IBOutlet weak var deliveryTime: UILabel!
#IBOutlet weak var minOrder: UILabel!
#IBOutlet weak var category: UILabel!
#IBOutlet weak var foodPriceLabelBG: UIView!
#IBOutlet weak var foodPrice: UILabel!
override func awakeFromNib() {
super.awakeFromNib()
foodPicture.layer.cornerRadius = 75/2
foodPicture.clipsToBounds = true
}
override func layoutSubviews() {
super.layoutSubviews()
let maskLayer = CAShapeLayer()
let corners = UIRectCorner.TopLeft.union(UIRectCorner.BottomLeft)
maskLayer.path = UIBezierPath(roundedRect: foodPriceLabelBG.bounds, byRoundingCorners: corners, cornerRadii: CGSizeMake(20.0, 20.0)).CGPath
foodPriceLabelBG.layer.mask = maskLayer
foodPriceLabelBG.clipsToBounds = true
}
}
Your 'corner rounding' code is working very well, the problem is that your UIView's bottom edge is going outside of your Cell's bottom edge. Decrease your UIView's Y position and it will be covered by your Cell. I see your cell's separator line invisible too, that means you should give larger height to your Cell at heightForRowAtIndexPath:
You said it's working very well on scrolling, I suppose it's working when scrolling down and not working when scrolling to top. It means that your first cell was redrawn after second while scrolling to the bottom (where the second cell doesn't cover your first cell), and vice versa while scrolling to the top (where second cell covers your first cell)
I am getting data from JSON and it changes for each view so I need the labels to change their height depending on their content and also the rest of labels and buttons should move down. I am using sizeToFit but anything else moves and when I scroll it loses its height and goes to 1 line again.
My labels have 0 lines in storyboard.
#IBOutlet weak var titulares: UILabel!
#IBOutlet weak var scroller: UIScrollView!
#IBOutlet weak var imagen: UIImageView!
#IBOutlet weak var estilo: UILabel!
#IBOutlet weak var historia: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
// I get JSON Data
self.historia.sizeToFit()
self.titulares.sizeToFit()
self.estilo.sizeToFit()
Use autolayout
from the storyboard, press on a label and then in the right bottom side of the screen, you have the "Add new constrains" button.
Use it to set a spacing from a view to it's neighbors
https://developer.apple.com/library/tvos/documentation/UserExperience/Conceptual/AutolayoutPG/index.html
I am new to swift and am trying to add a UIScrollview to a custom UITableViewCell. I can't seem to get the scrollview to scroll in the simulator though. I have tested both vertical and horizontal scrolling.
Here is the code for my custom UITableViewCell
import UIKit
class CustomTableViewCell: UITableViewCell, UIScrollViewDelegate {
#IBOutlet weak var winLoseValueLabel: UILabel!
#IBOutlet weak var dateLabel: UILabel!
#IBOutlet weak var newTotalLabel: UILabel!
#IBOutlet weak var locationLabel: UILabel!
#IBOutlet weak var playersLabel: UILabel!
#IBOutlet weak var playersScrollView: UIScrollView!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
self.playersLabel.text = nil
//self.playersScrollView.contentSize.height = 1000
self.playersScrollView.contentSize.width = 1000
}
override func setSelected(selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
func addLabelToScrollView(str : String) {
if self.playersLabel.text == nil{
self.playersLabel.text = str
}
else{
self.playersLabel?.text = self.playersLabel.text! + "\n\(str)"
}
}
}
My playersScrollView outlet has been properly connected to the scrollview in my storyboard. As far as I can see from all of the tutorials and sources online, I should just have to set the contentSize width or height (larger than the view area) to get it to scroll, which I have done in the awakeFromNib function.
Any ideas why this is not working in the simulator? Secondly, ideally I would like to have a vertical scrolling scrollview in the table cell, but I thought that the table view's vertical scrolling might have been interfering with the scrollview, so I changed it for horizontal scrolling for testing, which also didn't work.
Can you have a vertical scrollview in a vertically scrolling UITableView, or will the table view scrolling interfere too much with the scrollview?
Ok, it turns out that the constraints on my playersLabel, which is a subview of playersScrollView, was the culprit, although I am not sure why. I adjusted the constraints on the label and that allowed the horizontal scrolling to work.
The vertical scrolling still did not work, so I had to override the touchesBegan and touchesEnded methods in the scroll view so I could disable/re-enable the scrolling of the table view.