SwiftUI, is there a traitCollectionDidChange-like method in a View? - swiftui

Question

I'm researching SwiftUI to see if it fits our compony's use case. However, I find it rather bare bones and wonder wether I am missing some key insights.
Currently I am researching if V/HStack's can respond dynamically to Accesability font-size changes.
The issue is that I need to give the items a frame, it does not automatically pin the outer Stacks items-view constraints to their inner content. When the user sets the font-size to full blown Bananas-mode the UI just breaks.
struct PatientHistoryView: View {
#State var model : PatientHistoryModel = historyModel;
var body : some View {
GeometryReader { g in
ScrollView(.vertical, showsIndicators: true) {
List
{
ForEach(self.model.data)
{ labResults in
LabDetailView(labeResults: labResults)
}
}.frame(width: 300, height: g.size.height).background(Color.clear)
}
}
}
}
adding these properties do not seem to affect the Font-scaling issues:
struct PatientHistoryView: View {
#State var model : PatientHistoryModel = historyModel;
var body : some View {
GeometryReader { g in
ScrollView(.vertical, showsIndicators: true) {
List
{
ForEach(self.model.data)
{ labResults in
LabDetailView(labeResults: labResults).frame(minWidth: 200, idealWidth: 400, maxWidth: 600, minHeight: 50, idealHeight: 100, maxHeight: 600)
}
}.frame(width: 300, height: g.size.height).background(Color.clear)
}
}
}
}
Here is the labDetailView
struct LabDetailView: View {
var labeResults : LabResults
var color : Color = .red
var spacer : some View {
Spacer().frame(width: 10, height: 0)
}
var body : some View {
GeometryReader { g in
HStack
{
Group
{
VerticalLineView().frame(width: 10, height: g.size.height, alignment: .leading).background(self.color)
self.spacer
self.spacer
LineStack(lineColor: .white, lineHeight: 2).frame(width: 20, height: 20, alignment: .center)
self.spacer
self.spacer
}
VStack(alignment: .leading, spacing: 8)
{
Text(self.labeResults.title).fontWeight(.bold)
Text(self.labeResults.type)
}
Spacer()
VStack(alignment: .center)
{
Text(self.labeResults.max.asString)
Spacer()
Text(self.labeResults.avg.asString).fontWeight(.bold).font(.system(size: 20))
Spacer()
Text(self.labeResults.min.asString)
}.frame(width: 50, height: g.size.height, alignment: .center)
self.spacer
self.spacer
}.frame(width: g.size.width, height: g.size.height, alignment: .leading)
}
}
}
In UIkit these issues can be resolved in the traitCollectionDidChange hook. However, in Swift UI I just cannot find an equivalent.
Doe anybody have any ideas?
Thanks!