50 lines
1.4 KiB
Swift
50 lines
1.4 KiB
Swift
//
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// Swiftfin is subject to the terms of the Mozilla Public
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// License, v2.0. If a copy of the MPL was not distributed with this
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// file, you can obtain one at https://mozilla.org/MPL/2.0/.
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//
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// Copyright (c) 2024 Jellyfin & Jellyfin Contributors
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//
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import SwiftUI
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import SwiftUIIntrospect
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struct ScrollViewOffsetModifier: ViewModifier {
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@StateObject
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private var scrollViewDelegate: ScrollViewDelegate
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init(scrollViewOffset: Binding<CGFloat>) {
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self._scrollViewDelegate = StateObject(wrappedValue: ScrollViewDelegate(scrollViewOffset: scrollViewOffset))
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}
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func body(content: Content) -> some View {
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content.introspect(
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.scrollView,
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on: .iOS(.v15),
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.iOS(.v16),
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.iOS(.v17),
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.iOS(.v18),
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.tvOS(.v15),
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.tvOS(.v16),
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.tvOS(.v17),
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.tvOS(.v18)
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) { scrollView in
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scrollView.delegate = scrollViewDelegate
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}
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}
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private class ScrollViewDelegate: NSObject, ObservableObject, UIScrollViewDelegate {
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let scrollViewOffset: Binding<CGFloat>
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init(scrollViewOffset: Binding<CGFloat>) {
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self.scrollViewOffset = scrollViewOffset
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}
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func scrollViewDidScroll(_ scrollView: UIScrollView) {
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scrollViewOffset.wrappedValue = scrollView.contentOffset.y
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}
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}
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}
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