Sheet presentationDetents breaks after rapid open/dismiss cycles

Question

ailu OP

Created Nov ’24

Replies 11

Boosts 8

Views 1.1k

Participants 12

Basic Information

Please provide a descriptive title for your feedback:

Sheet presentationDetents breaks after rapid open/dismiss cycles

Which platform is most relevant for your report?

iOS

Description

Steps to Reproduce:

Create a sheet with presentationDetents([.medium])
Rapidly perform these actions multiple times (usually 3-4 times): a. Open the sheet b. Immediately scroll down to dismiss
Open the sheet again
Observe that the sheet now appears at .large size, ignoring the .medium detent

Expected Result: Sheet should consistently maintain .medium size regardless of how quickly it is opened and dismissed.

Actual Result: After rapid open/dismiss cycles, the sheet ignores .medium detent and appears at .large size.

Reproduction Rate:

Occurs consistently after 3-4 rapid open/dismiss cycles
More likely to occur with faster open/dismiss actions

Configuration:

iOS 18
Xcode 16.0 (16A242d)
SwiftUI
Device: iPhone 14

Boost

Answer 1

ailu OP

Nov ’24

I've filed a Feedback Assistant report for this issue: FB15718814

0

Answer 2

bfuhro OP

Nov ’24

I experience the same bug. It seems that it was introduced in IOS 18.0 as I couldnt reproduce with IOS 17.5 (and also experienced it with IOS 18.1)

0

Answer 3

DTS Engineer OP

Apple

Nov ’24

Thanks for filing the bug report, I was able to reproduce the issue and it looks like a bug to me.

Have you tried specifying a custom detent with a height as a way to workaround the issue ?

2

Answer 4

harveen OP

Dec ’24

I'm also seeing this issue on my device:

iOS Version: 18.0.1

Model: iPhone 14 Pro

SwiftUI

XCode 16.1

0

Answer 5

ztwang OP

Feb ’25

I'm also seeing this issue on my device:

iOS Version: 18.1.1

Device: iPhone 11

SwiftUI

XCode 16.2

0

Answer 6

yserdiuk OP

Mar ’25

I'm also seeing this issue on my device:

iOS Version: 18.4 Device: iPhone 13 SwiftUI XCode 16.2

And yes, it appears despite specifying a custom detent with a height.

0

Answer 7

dmalicke OP

Mar ’25

I am seeing this as well in iOS version 18.3.2, iPhone 16 Pro

0

Answer 8

JackYing OP

Apr ’25

I'm also seeing this issue on my device:

iOS Version: 18.4 Device: iPhone 16 Pro Max SwiftUI XCode 16.2

And yes, it appears despite specifying a custom detent with a height.

1

Answer 9

TOR-RG OP

May ’25

This is still an issue with iOS 18.4.1. It doesn't matter how fast you open the sheets, if you try to present a sheet when another is already opened it will trigger this as well.

0

Answer 10

vitorb OP

Jun ’25

Same issues with iOS 18.5

0

Answer 11

kam.voick OP

Jul ’25

Same here, one way to fix this temporarily is to set detent directly on presentationController within sheet's content

.onAppear {
	guard let windows = UIApplication.shared.connectedScenes.first as? UIWindowScene else {
		return
	}

	if let controller = windows.windows.first?.rootViewController?.presentedViewController,
	   let sheet = controller.presentationController as? UISheetPresentationController {
		sheet.detents = [.medium()]
	}
}

1