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IndentScrollView - A paging ScrollView that tracks the target content view
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| import SwiftUI | |
| struct IndentScrollView: View { | |
| let min = 0.5 | |
| let max = 3.5 | |
| let increment = 0.1 | |
| @State | |
| var multiplier = 0.5 | |
| @State | |
| var step: Double? = 0.5 | |
| var body: some View { | |
| VStack { | |
| Text("\(String(format: "%.1f", multiplier))x") | |
| .foregroundStyle(Color.green) | |
| .font(.headline) | |
| GeometryReader { geo in | |
| ScrollView(.horizontal, showsIndicators: false) { | |
| HStack(spacing: 20) { | |
| // !!IMPORTANT!! | |
| // ForEach implicitly applies an id to the content view | |
| // without this $step does not update | |
| ForEach(Array(stride(from: min, to: max + increment, by: increment)), id: \.self) { index in | |
| Rectangle() | |
| .foregroundStyle(Color.gray) | |
| .frame(width: 2) | |
| .overlay { | |
| if step == index { | |
| Color.green | |
| } | |
| } | |
| } | |
| } | |
| .scrollTargetLayout() | |
| .padding(.horizontal, geo.frame(in: .local).midX) | |
| } | |
| .scrollTargetBehavior(.viewAligned) | |
| .scrollPosition(id: $step, anchor: .trailing) | |
| .mask( | |
| LinearGradient(gradient: Gradient(colors: [.black, .black.opacity(0.1)]), | |
| startPoint: .center, | |
| endPoint: .leading) | |
| ) | |
| .mask( | |
| LinearGradient(gradient: Gradient(colors: [.black, .black.opacity(0.1)]), | |
| startPoint: .center, | |
| endPoint: .trailing) | |
| ) | |
| } | |
| } | |
| .padding() | |
| .background(Color.black) | |
| .frame(width: 300, height: 100) | |
| .onChange(of: step) { oldValue, newValue in | |
| guard let newValue else { return } | |
| multiplier = newValue | |
| } | |
| } | |
| } |
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A la Spotify's podcast speed control
