swift - 如何使用 SwiftUI 获取 ScrollView 的动态文本高度

Question

这给了我正确的动态文本高度

import SwiftUI
struct ContentView : View {
    var body: some View {
        List {
            Text("This is some very long text can we can see scrolls past two lines ").lineLimit(nil)   
        }
    }
}

#if DEBUG
struct ContentView_Previews : PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}
#endif

但是以下内容会截断文本。我如何获得以下动态高度？

import SwiftUI
struct ContentView : View {
    var body: some View {
        GeometryReader { reader in
            ScrollView {
                Text("This is some very long text can we can see scrolls past two lines ")
                    .lineLimit(nil)
                    .frame(width: reader.size.width)
            }
        }
    }
}
#if DEBUG
struct ContentView_Previews : PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}
#endif

标签： swiftswiftui

Answer 1

您需要使用fixedSize修饰符防止截断。在你的情况下，它就像：

Text("This is some very long text can we can see scrolls past two lines ")
 .lineLimit(nil)
 .fixedSize(horizontal: false, vertical: true) //** It keeps 'width size' and expands 'height size'
 .frame(width: reader.size.width)