Xcode 12 & iOS 14 betas - SwiftUI Lists do not render content when presented in a Sheet/Modal view.

Question

Created Jun ’20

Replies 12

Boosts 0

Views 1.7k

Participants 9

Hi!

I am testing my app on the new Xcode 12 beta and iOS 14 beta 1.

My app contains a section where a SwiftUI List is presented modally with a simple .sheet declaration:

Code Block .sheet(isPresented: $showingSheet, content: {

Within this presented list, tapping an item in the list will present further content in a new modally presented .sheet on top of the first one. These subsequent modal sheets also contain SwiftUI List objects with further content.

My issue in these new betas is that any .sheet modals presented subsequently to the first .sheet presented will not render any content in their Lists.

My lists contain buttons that toggle the Boolean that presents the .sheet content. Example:

Code Block            List {
ForEach(selectableLeagues, id: \.self) { league in
                    Button(action: {
                        self.selectedDivision.append(contentsOf: league)
                        self.showSheet.toggle()

Sometimes, dismissing and reopening the subsequent modals will make the List content pop in, but this is very unreliable.

Needless to say, all of these features worked in Xcode 11 and iOS 13.

Has anyone else experienced this in the new betas so far?

Boost

Answer 1

d5automations OP

Jun ’20

After playing around with this further, I can consistently recreate the following issue:

Launching the "root" .sheet works fine
Launching the next .sheet by tapping a button in my root sheet (and subsequent sheets): no content appears until dismissing and re-invoking the .sheet.

So the data I am passing to these .sheet objects is definitely getting passed...but for some reason it only shows up when the .sheet is presented the second time after being dismissed.

0

Answer 2

Apple Designer OP

Apple

Jun ’20

Howdy! It would be super helpful if you filed feedback for this issue, especially if you attach a small reproducing sample project when filing!

https://feedbackassistant.apple.com

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Answer 3

d5automations OP

Jun ’20

https://feedbackassistant.apple.com/feedback/7760604

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Answer 4

Apple Designer OP

Apple

Jun ’20

Much appreciated! 🙏
Don't forget to include which OS you tried this on, was this on iOS 14?

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Answer 5

d5automations OP

Jun ’20

Yes, iOS14

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Answer 6

mohammad.rahchamani OP

Jun ’20

I'm experiencing the exact same issue. everything is fine on iOS 13, but sheets won't appear for the first time in iOS 14.

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Answer 7

MrPalmer OP

Jul ’20

I was having a similar issue (sheets showing up blank). I changed the sheet's view to use @Binding instead of @ObservedObject.

That solved my issue.
I hope this helps.

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Answer 8

prasannafromoz OP

Aug ’20

This is still an issue in beta 4. Starting to worry me that this will be part of the iOS 14 release 😞

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Answer 9

Wolfpacker OP

Sep ’20

I am still having this issue, even with the GM version. Is anyone else still seeing it? Any suggestions for a workaround?

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Answer 10

mistersender OP

Oct ’20

I'm also experiencing this issue after updating to the latest xcode 12, running on iOS14. Like everyone else, was not an issue on 13. did anyone come up with a livable workaround?

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Answer 11

milutz OP

Oct ’20

This seems to be related to issues myself and several others are facing. I asked (here: https://developer.apple.com/forums/thread/662553), if anybody has received any official update on that issue, yet. So far it seems nobody did.
Frankly I find it worrying, that something quite fundamentally breaks in a new, but not beta framework and it's three month without a fix or at least getting any info (workaround, or even a "hey, we know it's a bug") from Apple. Any communication on this would not only help to get applications working which were finde in iOS13, but also help to decide, if other issues we are seeing (like animations not working anymore in some cases) are related or something new. So far I haven't received any feedback on the feedback I filed (FB8714689). At least I now see that there are "more than 10" similar reports - it seems we're building a community here ;-).
And, to end on on a positive note: So far feedback for SwiftUI I gave, was definitely handled way better/faster, than any other feedback I gave.

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Answer 12

Dinakar Soma OP

Oct ’20

I am having the same issue on official iOS 14 & when used xcode 12.
Plz reply if someone finds the root cause/work around or if Apple fixes it.

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