swiftui - 点击文本以显示所有内容

Question

我想在新闻提要上创建一个查看更多...功能，就像 Facebook 一样。SwiftUI 列表有行，一行由（HStack（用户名，发布时间）的 VStack、文本（默认仅显示 2 行并且可消耗以显示所有内容）和最后一个自定义大小的图像组成。我能够实现切换并将 lineLimit 设置为 nil 以反映这一点，但问题是顶部 HStack 在行的高度之外并隐藏在前一行的后面。我使用绑定变量来触发视图刷新但结果如何.

Answer 1

这是一个工作示例，说明如何使用表示行的 aScrollView和一个简单的来实现此目的：struct

import SwiftUI

struct FeedList: View {
    var body: some View {
        ScrollView {
            ForEach(1...50, id: \.self) { item in
                VStack {
                    FeedRow()
                    Divider()
                }
            }
        }
    }
}

struct FeedRow: View {

    @State var value: Bool = false

    var body: some View {
        VStack {
            HStack {
                Text("Username")
                Text("17:17h")
            }
            .padding(10)
            Text("I would like to create a See more... feature on the news feed, pretty much like Facebook. The SwiftUI list has rows, a row is composed of a VStack of (HStack (username, post time), Text (showing only 2 lines by default and expendable to show all of it is toggled) and finally an image with custom size. I was able to implement the toggle and set lineLimit to nil to reflect that but the problem is that the top HStack is outside the height of the row and hidden behind the previous row. I used a binding variable to trigger the views to refresh but ho results.")
                .fixedSize(horizontal: false, vertical: true)
                .lineLimit(self.value ? nil : 2)
                .padding(.horizontal, 10)
            HStack {
                Spacer()
                Button(action: {
                    withAnimation {
                        self.value.toggle()
                    }
                }, label: {
                    if self.value {
                        Text("show less")
                    } else {
                        Text("show more")
                    }
                }).padding(.horizontal, 10)
            }
        }
        .animation(.easeInOut)
    }
}

struct ContentView: View {

    var body: some View {
        FeedRow()
    }

}

它仍然存在一些问题，但我希望它有所帮助！