swiftui - SwiftUI 中形状的动态高度

Question

这是我想做的一个最小的、可重复的例子。

我有一系列的段落。

var notes = [
    "One line paragraph",
    "This is a small paragraph. This is a small paragraph. This is a small paragraph. This is a small paragraph.",
    "This is a big paragraph. This is a big paragraph. This is a big paragraph. This is a big paragraph. This is a big paragraph. This is a big paragraph. This is a big paragraph. This is a big paragraph. This is a big paragraph. This is a big paragraph. This is a big paragraph."
]

这就是我想要显示的方式:


这是我的代码。

struct ContentView: View {
    var notes = [
        "One line paragraph",
        "This is a small paragraph. This is a small paragraph. This is a small paragraph. This is a small paragraph.",
        "This is a big paragraph. This is a big paragraph. This is a big paragraph. This is a big paragraph. This is a big paragraph. This is a big paragraph. This is a big paragraph. This is a big paragraph. This is a big paragraph. This is a big paragraph. This is a big paragraph."
    ]

    var body: some View {
        VStack(alignment: .leading) {
            ForEach(self.notes, id: \.self) {note in
                HStack {
                    Capsule()
                        .fill(Color.blue)
                        .frame(width: 4.5)

                    Text(note)
                    .lineLimit(nil)
                }
                .padding()
            }

        }
    }
}

这是我得到的输出:


我什至尝试添加 Spacer()到底部 VStack (在 ForEach 之后)但输出仍然相同。

我想知道的是 如何将这些蓝色竖条的高度更改为其各自段落的高度 就像在第一个屏幕截图中一样。

Answer 1

这是可能的方法。使用 Xcode 11.4/iOS 13.4 测试

var body: some View {
    VStack(alignment: .leading) {
        ForEach(self.notes, id: \.self) {note in
            HStack {
                Text(note)
                    .padding(.leading)
            }
            .overlay(Capsule()       // also can be .background
                        .fill(Color.blue)
                        .frame(width: 4.5), alignment: .leading)
            .padding()
        }
    }
}