SwiftUI - ScrollView: onChange -> scrollTo截断文本

import SwiftUI

struct ContentView: View {
    @State private var scrollPosition: CGFloat = 0
    
    var body: some View {
        ScrollView {
            VStack {
                Text("这是一段很长的文本内容，用于演示截断文本的功能。当滚动到指定位置时，将会自动截断文本并显示截断后的内容。")
                    .lineLimit(1)
                    .truncationMode(.tail)
                    .onChange(of: scrollPosition) { newPosition in
                        if newPosition > 100 {
                            // 执行截断文本的操作
                            // ...
                        }
                    }
            }
        }
        .onPreferenceChange(ScrollViewOffsetPreferenceKey.self) { value in
            scrollPosition = value.y
        }
    }
}

struct ScrollViewOffsetPreferenceKey: PreferenceKey {
    static var defaultValue: CGPoint = .zero
    
    static func reduce(value: inout CGPoint, nextValue: () -> CGPoint) {
        value = nextValue()
    }
}