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Precondition failure with several MapViews
for anyone else who experienced my particular issue. I noticed this with the following scenario.
long story short .tag(step.id) (where step is a core data object) was creating issues on creation and deletions. to this day. no idea why
ScrollViewReader { reader in
VStack(spacing: 0) {
HStack { Spacer() }
ForEach( (cycle.steps!.array as! [Step]), id: \.self) { step in
let index = cycle.steps!.index(of: step)
StepRowLines(
step: .constant(step),
index: index + 1,
stepCase: StepRowLines.ofStepCase(index: index, size: cycle.steps?.count ?? 0),
deleteStep: deleteStep,
onTap: onTap,
highlight: timeManager.step == index
)
.animation(.default)
.transition(AnyTransition.slide.combined(with: .opacity).animation(.easeInOut))
.id(step.id)
.tag(step.id)
}
}
.onChange(of: timeManager.step) { idx in
let index = idx >= 0 ? idx : 0
withAnimation(Animation.easeIn(duration: 0.5)) {
reader.scrollTo((cycle.steps?.array as! [Step])[index].id, anchor: UnitPoint.init(x: 100, y: 0.66))
}
}
}