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SOLVED: Background Color of a list, make it clear color.

Forums > SwiftUI

This used to work, but as of iOS14 beta 5, there is a white space behind the "cells". Any idea how to get rid of the white space?

struct ContentView: View {
    var body: some View {

        let items = ["Donald", "Daffy", "Mickey", "Minnie", "Goofy"]

        UITableView.appearance().backgroundColor = .clear
        UITableViewCell.appearance().backgroundColor = .clear

        return NavigationView {
            ZStack {
                Color.red
                    .edgesIgnoringSafeArea(.all)
                List {
                    ForEach(items, id: \.self) { item in
                        NavigationLink(destination: DetailView(item: item)) {
                                ItemCell(item: item)
                                .frame(height: 50)
                            }

                    }
                }
            }
        }
    }
}

struct DetailView: View {
    var item: String

    var body: some View {
        Text(item)
    }
}

struct ItemCell: View {

    var item: String
    var body: some View {

        ZStack {

            RoundedRectangle(cornerRadius: 10)
                .fill(LinearGradient(gradient: Gradient(colors: [Color.green, Color.blue]), startPoint: .topLeading, endPoint: .bottomTrailing))
                .clipShape(RoundedRectangle(cornerRadius: 10))
                .padding(.horizontal, 4)
                .shadow(color: Color.black, radius: 3, x: 3, y: 3)

            HStack(alignment: .center) {
                Text(item)
            }.font(.body)
        }
    }
}

   

Interesting. If you change "List" to "Scrollview", it looks like it should (and you can get rid of the UITableView items. But is that the best way to do it?

   

...

ForEach(items, id: \.self) { item in
                        NavigationLink(destination: DetailView(item: item)) {
                                ItemCell(item: item)
                                .frame(height: 50)
                            }
                    }.listRowBackground(Color.red)

...

1      

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Thanks DimNovo

And no, I would never use that color scheme in a public project.

   

No problem ShadowDES

If you expect to get changes in some object's properties - you have to call this property...

I don't quite understand - about 'that color scheme'?

Color.clear

it's OK too in this case.

   

I've been wrestling with this and have a static list working nicely:

  struct ClearCell: ViewModifier {
      func body(content: Content) -> some View {
          content
              .offset(x: -20)
              .padding(.horizontal)
              .font(.system(size: 18, weight: .bold, design: .rounded))
              .foregroundColor(.black)
              .listRowBackground(Color.clear)
      }
  }

Then in my View body I have this inside a ZStack (for a background image) inside GeometryReader and it works.

  List {
                  Text("Thing")
                      .frame(width: geo.size.width, alignment: .leading)
                      .modifier(ClearCell())
                  Text("Another Thing")
                      .frame(width: geo.size.width, alignment: .leading)
                      .modifier(ClearCell())
                  Text("And Another Thing")
                      .frame(width: geo.size.width, alignment: .leading)
                      .modifier(ClearCell())
                  Text("Yet Another Thing")
                      .frame(width: geo.size.width, alignment: .leading)
                      .modifier(ClearCell())
              }
              .frame(width: geo.size.width, height: geo.size.height)
              .offset(x: -50.0,y: -50.0)
              .onAppear() {
                  UITableView.appearance().backgroundColor = UIColor.clear
                  UITableViewCell.appearance().backgroundColor = UIColor.clear
              }

I do seem to need to interfere with both TV and TVCell appearances for success.

However, change the list to dynamic from an array - .... struct AnItem with id: UUID and descr: String and it all goes white again. :-(

        List(items, id: \.id ) { item in
            Text(item.descr)
                .frame(width: geo.size.width, alignment: .leading)
                .modifier(ClearCell())
        }
        .frame(width: geo.size.width, height: geo.size.height)
        .offset(x: -50.0,y: -50.0)
        .onAppear() {
            UITableView.appearance().backgroundColor = UIColor.clear
            UITableViewCell.appearance().backgroundColor = UIColor.clear
        }

I hope it helps.

I'm still digging but it does feel like List is a tad iffy, in this respect, in XCode 12.0.1 and iOS 14.0.1

   

FWIW: I'm working on converting my UIKit app to SwiftUI and have been banging my head against this problem for days.

The body of my ContentView is a NavigationView, which wraps a FilteredView (see Dynamically filtering @FetchRequest with SwiftUI). The body of my FilteredView wraps a List which wraps a ZStack which wraps my detail view stacked on a NavigationLink (to avoid displaying the default List disclosure indicator).

Regardless of what combinations of different solutions I attempt, it seems like there's no way to make the List transparent and / or to (consistently) apply a background color to it.

   

I've gotten this to work (for now). I'll update as I make progress on my List and change it from a simple one to one using more complex views in case it stops working.

  init() {
     UITableView.appearance().separatorStyle = .none
     UITableViewCell.appearance().backgroundColor = UIColor(Color.red)
     UITableView.appearance().backgroundColor = UIColor(Color.red)
  }

(And, no, my app isn't really using a red background!)

   

How to do in SwiftUI 2.0?:

      let withIndex = entries.enumerated().map { $0 }
      List(withIndex, id: \.element.id) { index, entry in
          Button(action: {
              //do something
          }) {
              Text(entry.first)
          }.listRowBackground(Color.clear)
      }

Background is still white.

   

Got it working, even though people say in iOS 14 List doesn't use UITableView this was the missing piece:

UITableView.appearance().backgroundColor = .clear
UITableViewCell.appearance().backgroundColor = .clear

Anyone knows how to hide or make separator full width (now it appears with left padding)?

   

Looks like the problem of a List view is that it only takes into consideration the ColorScheme. Changing the ColorScheme from light to dark changes the background color from white to black.

List { ... }.colorScheme(.dark)
// Or
List { ... }.colorScheme(.light)

And there is no way to not use the color scheme or provide a custom implementation. Correct me about the last statement if I'm wrong.

   

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