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fix nav wheel snaping

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Eric 2026-10-25 20:33:04 +08:00
parent 2599d8cc40
commit ad8a680b76
1 changed files with 5 additions and 2 deletions
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7
tg_test/WheelNavBar.swift
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@ -108,8 +108,11 @@ struct WheelNavBar: View {
}
}
.onEnded { value in
let velocity = value.predictedEndTranslation.width / itemSpacing
let calcIndex = Double(selectedIndex) - Double(value.translation.width / itemSpacing) - (velocity * 0.2)
// Momentum = how far the gesture would coast past the finger's release point.
// Cap it to one tab so a hard flick can't skip several tabs.
let momentum = value.predictedEndTranslation.width - value.translation.width
let cappedMomentum = min(max(momentum, -itemSpacing), itemSpacing)
let calcIndex = Double(selectedIndex) - Double((value.translation.width + cappedMomentum * 0.5) / itemSpacing)
let targetIndex = min(max(Int(round(calcIndex)), 0), tabs.count - 1)
withAnimation(.spring(response: 0.35, dampingFraction: 0.75)) {