SwiftUI GeometryReader compact size

Question

I would like my LoadingTitle to have a width of 70% of the screen so I use the GeometryReader but it makes the vertical size expand and my LoadingTitle takes much more vertical space. I would like it to remain as compact as possible.

When using hardcoded width: 300 I get the correct layout (except the relative width):

struct ContentView: View {
    var body: some View {
        VStack(alignment: .leading, spacing: 0) {
            LoadingTitle()
            Color.blue
        }
    }
}

struct LoadingTitle: View {
    var body: some View {
        HStack() {
                Color.gray
            }
            .frame(width: 300, height: 22)
            .padding(.vertical, 20)
            .border(Color.gray, width: 1)
    }
}

Now if I wrap the body of my LoadingTitle in the GeometryReader I can get the correct relative size but then the GeometryReader expands my view vertically:

struct LoadingTitle: View {

    var body: some View {
        GeometryReader { geo in
            HStack() {
                Color.gray
                    .frame(width: geo.size.width * 0.7, height: 22, alignment: .leading)
                Spacer()
            }
            .padding(.vertical, 20)
            .border(Color.gray, width: 1)
        }
    }
}

I tried using .fixedSize(horizontal: false, vertical: true) on the GeometryReader as other suggested but then the resulting view is too much compact and all its paddings are ignored:

How could I achieve the layout of the 1st screenshot with a relative width?

Asperi · Accepted Answer · 2020-04-19 07:21:08Z

2

Here is possible approach. Tested with Xcode 11.4 / iOS 13.4 (w/ ContentView unchanged)

struct LoadingTitle: View {

    var body: some View {
        VStack { Color.clear }
            .frame(height: 22).frame(maxWidth: .infinity)
            .padding(.vertical, 20)
            .overlay(
                GeometryReader { geo in
                    HStack {
                        HStack {
                            Color.gray
                                .frame(width: geo.size.width * 0.7, height: 22)
                        }
                        .padding(.vertical, 20)
                        .border(Color.gray, width: 1)
                        Spacer()
                    }
                }
            )
    }
}

answered Apr 19, 2020 at 7:21

Asperi

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1 Comment

Jan Over a year ago

nice, thanks. I believe we can also use a Group instead of the VStack and remove the outer HStack from the GeometryReader

BollMose · Accepted Answer · 2021-09-20 09:08:58Z

0

Since you have a fixed height for title,

struct LoadingTitle1: View {
    var body: some View {
        GeometryReader { geo in
            HStack {
                Color.gray.frame(width: geo.size.width * 0.7)
                .padding(.vertical, 20)
                .border(Color.gray, width: 1)
                
                Spacer()
            }
        }.frame(height: 62)
    }
}

edited Sep 20, 2021 at 9:08

answered Sep 20, 2021 at 8:58

BollMose

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