In iOS 17, whenever I change the height of a UIHostingController in a animation block, the root SwiftUI.View ignores it:
class TestAnimationController: UIViewController {
var heightConstraint: NSLayoutConstraint!
// a basic trigger
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesEnded(touches, with: event)
heightConstraint.constant = heightConstraint.constant == 300 ? 100 : 300
UIView.animate(withDuration: 1.0) {
self.view.layoutIfNeeded()
}
}
override func viewDidLoad() {
super.viewDidLoad()
let content = UIHostingController(rootView: Color.red)
addChild(content)
view.addSubview(content.view)
content.view.translatesAutoresizingMaskIntoConstraints = false
heightConstraint = contentView.heightAnchor.constraint(equalToConstant: 100)
heightConstraint.isActive = true
contentView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
contentView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
contentView.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
content.didMove(toParent: self)
}
}
The result is terrible:
It was not the case in iOS 14.5:
Does someone have a workaround?
gaetanz
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