SwiftUI - How to get size (height) of ScrollView content

Question

I want to determine the height of the content inside my (vertical) ScrollView.

ScrollView {  
    //My Content
}

Is this possible? I've tried a few things but nothing seems to work.

Unfortunately, using simply the GeometryReader isn't working, since it returns a value of 10 no matter what content is inside the ScrollView

Thanks!

Answer 1

Here is a way to actually get the height of the ScrollView content.

CZ54s answer seems intuitive, but it always returns a height of 10 which is not correct!.

We have to read the height of the content instead. GeometryReader directly inside ScrollView doesn't do that. A possible approach would be with .background/.overlay.

struct ContentView: View {

    var body: some View {
        ScrollView {
            ForEach(0..<1000) { i in
                Text("\(i)")
            }
            .background(
                GeometryReader { proxy in
                    Color.clear.onAppear { print(proxy.size.height) }
                }
            )
        }
    }
}

We get an output of 20500.0 which is correct.

Answer 2

You can use a GeometryReader :

 ScrollView {
        GeometryReader { geometry in
         //print(geometry.size.height) 
       }
    }