How to prevent TextField from disappearing in SwiftUI List?

Question

Created Dec ’19

Replies 4

Boosts 0

Views 2.5k

Participants 3

There's a nasty SwiftUI bug in which a

TextField

disappears if placed in a

HStack

within a

List.

List {
  ForEach(0...200, id: \.self) { index in
    HStack {
      Text("Text \(index)")
      TextField("Test", text: .constant("TextField \(index)"))
    }
  }
}

- Screenshot: https://i.stack.imgur.com/HARDF.png

- Video: https://recordit.co/X12uGct7gD

This happens when

TextField

is placed within a

HStack / VStack / ZStack / .overlay() / .background()

. It does not happen when

TextField

is the only child of

ForEach

.

I have filed a bug (FB7500885) but I'm looking for ideas from the community to work around it. Here is what I've tried so far:

Setting an explicit
```
.frame()
```
on
```
TextField
```
Setting
```
.fixedSized()
```
on
```
TextField
```
Using a
```
UITextField
```
wrapped in a
```
UIViewConvertible
```
, with or without layout constraints

Is there anything else I could try?

Boost

Answer 1

ldidi OP

Dec ’19

Fyi this is what fixed it: https://stackoverflow.com/a/59429857/646960

TextField("Test", text: .constant("TextField \(index)"))

    .id(index)

Not sure exactly why `id` is required here.

0

Answer 2

Claude31 OP

Dec ’19

Confirm, it works (in SwiftUI simulator on Mojave)

Doc stats about .id()

Generates a uniquely identified view that can be inserted or removed.

So, that has probably to deal with how List manages the dequeue of cells.

Whatever the reason, that shows Swift UI still has some rough edges… 😉

Not sure exactly why `id` is required here.

This should shed some light on .id()

h ttps://www.raywenderlich.com/5824937-swiftui-tutorial-navigation

0

Answer 3

Abosh OP

Mar ’20

Thank you! This was driving me insane. Setting the `id` worked.

0

Answer 4

Abosh OP

Jun ’20

Looks like this was fixed in iOS 14 b1/Xcode 12 b1!

0