mbrucedogs/vds_ios
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

pushing the heightConstraint into the selfsizingcv

Browse Source 
Signed-off-by: Matt Bruce <matt.bruce@verizon.com>
This commit is contained in:
Matt Bruce 2024-02-14 09:05:41 -06:00
parent ba33824576
commit 0aea286630
2 changed files with 8 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
VDS/Classes/SelfSizingCollectionView.swift
View File

@ -7,6 +7,7 @@
import Foundation
import UIKit
import Combine
/// UICollectionView subclassed to deal with Changing the size of itself based on its children and layout and changes of its contentSize.
@objc(VDSSelfSizingCollectionView)
@ -34,10 +35,13 @@ public final class SelfSizingCollectionView: UICollectionView {
// MARK: - Private Properties
//--------------------------------------------------
private var contentSizeObservation: NSKeyValueObservation?
private var collectionViewHeight: NSLayoutConstraint?
private var anyCancellable: AnyCancellable?
//--------------------------------------------------
// MARK: - Overrides
//--------------------------------------------------
/// The natural size for the receiving view, considering only properties of the view itself.
public override var intrinsicContentSize: CGSize {
let contentSize = self.contentSize
@ -63,12 +67,16 @@ public final class SelfSizingCollectionView: UICollectionView {
//ensure autoLayout uses intrinsic height
setContentHuggingPriority(.required, for: .vertical)
setContentCompressionResistancePriority(.required, for: .vertical)
collectionViewHeight = heightAnchor.constraint(equalToConstant: 0).activate()
// Observing the value of contentSize seems to be the only reliable way to get the contentSize after the collection view lays out its subviews.
self.contentSizeObservation = self.observe(\.contentSize, options: [.old, .new]) { [weak self] _, change in
// If we don't specify `options: [.old, .new]`, the change.oldValue and .newValue will always be `nil`.
if change.newValue != change.oldValue {
self?.invalidateIntrinsicContentSize()
if let height = change.newValue?.height {
self?.collectionViewHeight?.constant = height
}
}
}
}

4
VDS/Components/Buttons/ButtonGroup/ButtonGroup.swift
View File

@ -103,7 +103,6 @@ open class ButtonGroup: View {
//--------------------------------------------------
// MARK: - Private Properties
//--------------------------------------------------
fileprivate var collectionViewHeight: NSLayoutConstraint?
fileprivate lazy var positionLayout = ButtonGroupPositionLayout().with {
$0.position = .center
@ -132,8 +131,6 @@ open class ButtonGroup: View {
super.setup()
addSubview(collectionView)
collectionView.pinToSuperView()
collectionViewHeight = heightAnchor.constraint(equalToConstant: VDS.Button.Size.large.height)
collectionViewHeight?.activate()
}
//--------------------------------------------------
@ -184,7 +181,6 @@ open class ButtonGroup: View {
DispatchQueue.main.async { [weak self] in
guard let self else { return }
self.collectionView.collectionViewLayout.invalidateLayout()
self.collectionViewHeight?.constant = self.collectionView.intrinsicContentSize.height
}
}
}