SwiftUI 列表中某些行的布局问题

Question

I have tried to find a similar problem asked before, but failed.

I have a simple view with list. I am using a ForEach to show 10 iterations of the some list item to create a layout before I will add real data to this list. I have a problem with last 2 rows not rendering correctly. But sometimes it's other row. I have tested on an iPhone too and sometimes it's one row, sometimes another. The code for the view with list is this:

import SwiftUI

struct LocksView: View {

    @State private var locksPaid = 0

    var body: some View {
        NavigationView {
            List {
                DateView()
                    .listRowInsets(EdgeInsets())

                Picker(selection: $locksPaid, label: Text("Picker")) {
                    Text("All").tag(0)
                    Text("Not paid (2)").tag(1)
                }
                .pickerStyle(SegmentedPickerStyle())
                .padding(10)

                ForEach(0 ..< 10) {item in
                    LocksItemView()
                }

            }
            .navigationBarTitle(Text("Locks"))
            .navigationBarItems(trailing: EditButton())
        }
    }
}

The code for list items is this:

import SwiftUI

struct LocksItemView: View {

    @State private var paid : Bool = false

    var body: some View {
        HStack {

            Text("L15")
                .font(.title)
                .fontWeight(.heavy)
                .multilineTextAlignment(.center)
                .frame(width: 80)

            VStack(alignment: .leading) {
                Text("nickname")
                    .fontWeight(.bold)
                Text("category")
                Text("4 000 THB")
                    .fontWeight(.bold)
            }

            Spacer()

            Toggle(isOn: self.$paid) {
                Text("Paid")
            }
            .labelsHidden()
        }
    }
}

Why is toggle broken in some rows on my list? Why it moves to the left side?

Answer 1

It is not last items. If you set in your ForEach 20 instead of 10 and scroll up & down you'll see much more interesting issue.

I assume the reason, actually List bug, is the same as in this topic .

Workaround If it is not critical to you then use ScrollView instead of List , as tested there is no bug for it. Otherwise, file a Radar and wait for fix.

Answer 2

I tried your code at simulators first and had same issue too. But then I remembered, that there are some problems with 13.2 iOS and tried to run it on my device (iPhone 7, iOS 13.1.1) and everything works fine. I think that is the problem in 13,2 iOS. not in the List, There is sample: how I changed code for demonstration that everything is ok:

import SwiftUI

struct LocksView: View {
    
    @State private var locksPaid = 0

    var body: some View {
        NavigationView {
            List {
                Picker(selection: $locksPaid, label: Text("Picker")) {
                    Text("All").tag(0)
                    Text("Not paid (2)").tag(1)
                }
                .pickerStyle(SegmentedPickerStyle())
                .padding(10)

                ForEach(0 ..< 200) {item in
                    LocksItemView(number: item)
                }

            }
            .navigationBarTitle(Text("Locks"))
            .navigationBarItems(trailing: EditButton())
        }
    }
}

struct LocksItemView: View {

    @State private var paid : Bool = false
    var number: Int

    var body: some View {
        HStack {

            Text("L\(self.number)")
                .font(.title)
                .fontWeight(.heavy)
                .multilineTextAlignment(.center)
                .frame(width: 80)

            VStack(alignment: .leading) {
                Text("nickname")
                    .fontWeight(.bold)
                Text("category")
                Text("4 000 THB")
                    .fontWeight(.bold)
            }

            Spacer()

            Toggle(isOn: self.$paid) {
                Text("Paid")
            }
            .labelsHidden()
        }
    }
}

and on my phone the result is:

so there are bugs in 13.2 version and I hope Apple will fix them all