Discuss the different user interface frameworks available for your app.

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Running tests on multiple simulators and local mock servers
Hello, I have a question about running tests on multiple simulators. Currently, my company has a WDIO+Appium test suite with XCUITEST driver that runs on a single simulator through a mockttp proxy (we are intercepting and mocking some of the responses from our APIs and pass through the rest). In order to route the traffic we are currently using 'networksetup -setsecurewebproxy '. Everything works as expected. With growing number of tests we'd like to scale number of simulators on a single host to 3-5. We have a working setup but the problem are system-wide proxy settings routing traffic from multiple simulators, which we can't distinguish by UDID or any other means, we know of. We can spin multiple mock servers on the same machine but we are struggling to find the way to route the traffic on a simulator basis. In the end, both options are viable: 1 mock server running for multiple simulators N number of mock servers for N number of simulators Has anyone had the same/similar problem? How to approach this? We are currently running on Sequoia OSX and platform version 18.6. Thanks!
1
0
360
Feb ’26
init(data: Data) for SwiftUI Image?
Is there any reason why the SwiftUI Image hasn’t a direct init(data: Data) like UIImage from UIKit? In my opinion it’s very unintuitive and expensive to create a UIImage in the first step to create a SwiftUI Image with Image(uiImage: UIImage) in the second step. In addition to that, this causes unnecessary UIKit imports. In my opinion this is a very obvious small in the API, so are there any reasons why it is what it is? Best regards
0
0
258
Jan ’26
Text with .secondary vanishes when Material background is clipped to UnevenRoundedRectangle in ScrollView
I just found a weird bug: If you place a Text view using .foregroundStyle(.secondary), .tertiary, or other semantic colors inside a ScrollView, and apply a Material background clipped to an UnevenRoundedRectangle, the text becomes invisible. This issue does not occur when: The text uses .primary or explicit colors (e.g., .red, Color.blue), or The background is clipped to a standard shape (e.g., RoundedRectangle). A minimal reproducible example is shown below: ScrollView{ VStack { Image(systemName: "globe") .imageScale(.large) .foregroundStyle(.tint) Text("Hello World.") .font(.system(size: 15)) .foregroundStyle(.quinary) } } .padding() .frame(height: 100) .background(Material.regular) .clipShape(UnevenRoundedRectangle(topLeadingRadius: 10,bottomLeadingRadius: 8,bottomTrailingRadius:8, topTrailingRadius: 8))
1
0
305
Feb ’26
Crash/Exception thrown in UITableView initialization stack
Hello, We are seeing an intermittent crash when initializing a base UITableView with Apple's [initWithFrame:style:] initializer. Crash stack: Role: Foreground OS Version: iOS 26.1 Exception Type: EXC_BREAKPOINT Exception Subtype: KERN_INVALID_ADDRESS EXC_BREAKPOINT: 0 libswiftCore.dylib +0x1358c0 _assertionFailure(_:_:file:line:flags:) 1 UIKitCore +0x1fdca0 0x188c26ca0 (0x188c26b20 + 384) 2 UIKitCore +0x1ffa60 0x188c28a60 (0x188c2890c + 340) 3 UIKitCore +0x2012d0 0x188c2a2d0 (0x188c2a1ec + 228) 4 UIKitCore +0x200f20 0x188c29f20 (0x188c29cac + 628) 5 UIKitCore +0x200428 0x188c29428 (0x188c29384 + 164) 6 UIKitCore +0x18af7f4 -[UITableMetricsAdapter _updateSharedSectionMetricsForListGeometry:] 7 UIKitCore +0x201da8 -[UITableMetricsAdapter tableBackgroundColor] 8 UIKitCore +0x1643a44 ___39-[UITableView _applyAppearanceDefaults]_block_invoke 9 UIKitCore +0x196f3d0 +[UIView _performSystemAppearanceModifications:] 10 UIKitCore +0x1643978 -[UITableView _applyAppearanceDefaults] 11 UIKitCore +0x202854 -[UITableView _setupTableViewCommon] 12 UIKitCore +0x1643760 -[UITableView initWithFrame:style:] 13 Application +0x30b6a40 closure #1 in variable initialization expression of MyAppClass.tableView 14 Application +0x30b6ef0 MyAppClass.init(frame:) Has anyone else seen something like this? Any insights or advice is much appreciated, thank you!
1
0
156
Feb ’26
The Nightmare of Small Toolbar Icons
When building in Xcode on MacOS Tahoe, it seems it is no longer possible to dynamically specify a "small" size toolbar for NSToolbar/NSToolbarItem. It works in MacOS code compiled and linked on earlier systems. I don't want to use "SFSymbol", or "templates". I have over 60 custom-made .png toolbars, in individual Image Set files, at the previous requisite sizes of 24x24 / 48x48, and 32x32 / 64x64. Sure -- I can configure an NSToolbar with whatever size .png assets I want. I just can't dynamically switch between the two groups of sizes. According to the Apple Coding Assistant, the only solution is to change the image names of each of the NSToolbarItems at runtime. OK -- but even when attempting that, the NSToolbarItems refuse to take on their smaller size... ...unless: they are attached to a custom view NSToolbarItem with an NSButton of style "Bevel". I have about 10 of those, and YES -- I CAN change those to a "small" size. Is this REALLY what I'm forced to do?! The Apple Coding Assistant just runs me around in circles, making coding suggestions that include properties that don't exists. I've gone around and around on these issues for over a week -- it can't be this hard, right? Is there no way to make multiple NSToolbar objects, one for "large" and one for "small"?
1
0
246
Feb ’26
Gesture & SimultaneousGesture interfere with ScrollView behaviour.
I have faced a problem while I was trying to implement a reorder drag & drop view. I found that when I add any kind of .gesture or .simultaneousGesture, a ScrollView's scrolling behavior wasn't working properly (does not scroll at all). ScrollView(.vertical, showsIndicators: false) { ForEach($items) { $item in EditorCard(stepDetails: item) .simultaneousGesture( customCombinedGesture(item) ) } } This ScrollView worked fine with .onLongPressGesture(), however, I wanted to use custom gestures sequences.
0
0
158
Mar ’26
Technical risks of swapping between UITableViewDiffableDataSource and UITableViewDataSource on UITableView
I am currently migrating an app from the classic UITableViewDataSource to UITableViewDiffableDataSource. In certain complex cases, I find myself needing to toggle between the UITableViewDataSource and UITableViewDiffableDataSource on a single UITableView instance. Apple's official documentation for UITableViewDiffableDataSource contains a strict warning: "Do not change the dataSource on the table view after you configure it with a diffable data source. If the table view needs a new data source after you configure it initially, create and configure a new table view and diffable data source." I’m seeking clarification on: Internal State: What specific UIKit caching or internal state is corrupted if we nil out the diffable source and re-assign a classic one? Background Processes: Does the background diffing engine pose a risk (race conditions/crashes) if the source is swapped while a diff is calculating? The "Safe" Reset: If swapping is truly necessary, is there a verified cleanup sequence (e.g., clearing snapshots first) that avoids the need to recreate the UITableView entirely?
0
0
54
6d
Running tests on multiple simulators and local mock servers
Hello, I have a question about running tests on multiple simulators. Currently, my company has a WDIO+Appium test suite with XCUITEST driver that runs on a single simulator through a mockttp proxy (we are intercepting and mocking some of the responses from our APIs and pass through the rest). In order to route the traffic we are currently using 'networksetup -setsecurewebproxy '. Everything works as expected. With growing number of tests we'd like to scale number of simulators on a single host to 3-5. We have a working setup but the problem are system-wide proxy settings routing traffic from multiple simulators, which we can't distinguish by UDID or any other means, we know of. We can spin multiple mock servers on the same machine but we are struggling to find the way to route the traffic on a simulator basis. In the end, both options are viable: 1 mock server running for multiple simulators N number of mock servers for N number of simulators Has anyone had the same/similar problem? How to approach this? We are currently running on Sequoia OSX and platform version 18.6. Thanks!
Replies
1
Boosts
0
Views
360
Activity
Feb ’26
init(data: Data) for SwiftUI Image?
Is there any reason why the SwiftUI Image hasn’t a direct init(data: Data) like UIImage from UIKit? In my opinion it’s very unintuitive and expensive to create a UIImage in the first step to create a SwiftUI Image with Image(uiImage: UIImage) in the second step. In addition to that, this causes unnecessary UIKit imports. In my opinion this is a very obvious small in the API, so are there any reasons why it is what it is? Best regards
Replies
0
Boosts
0
Views
258
Activity
Jan ’26
Text with .secondary vanishes when Material background is clipped to UnevenRoundedRectangle in ScrollView
I just found a weird bug: If you place a Text view using .foregroundStyle(.secondary), .tertiary, or other semantic colors inside a ScrollView, and apply a Material background clipped to an UnevenRoundedRectangle, the text becomes invisible. This issue does not occur when: The text uses .primary or explicit colors (e.g., .red, Color.blue), or The background is clipped to a standard shape (e.g., RoundedRectangle). A minimal reproducible example is shown below: ScrollView{ VStack { Image(systemName: "globe") .imageScale(.large) .foregroundStyle(.tint) Text("Hello World.") .font(.system(size: 15)) .foregroundStyle(.quinary) } } .padding() .frame(height: 100) .background(Material.regular) .clipShape(UnevenRoundedRectangle(topLeadingRadius: 10,bottomLeadingRadius: 8,bottomTrailingRadius:8, topTrailingRadius: 8))
Replies
1
Boosts
0
Views
305
Activity
Feb ’26
Crash/Exception thrown in UITableView initialization stack
Hello, We are seeing an intermittent crash when initializing a base UITableView with Apple's [initWithFrame:style:] initializer. Crash stack: Role: Foreground OS Version: iOS 26.1 Exception Type: EXC_BREAKPOINT Exception Subtype: KERN_INVALID_ADDRESS EXC_BREAKPOINT: 0 libswiftCore.dylib +0x1358c0 _assertionFailure(_:_:file:line:flags:) 1 UIKitCore +0x1fdca0 0x188c26ca0 (0x188c26b20 + 384) 2 UIKitCore +0x1ffa60 0x188c28a60 (0x188c2890c + 340) 3 UIKitCore +0x2012d0 0x188c2a2d0 (0x188c2a1ec + 228) 4 UIKitCore +0x200f20 0x188c29f20 (0x188c29cac + 628) 5 UIKitCore +0x200428 0x188c29428 (0x188c29384 + 164) 6 UIKitCore +0x18af7f4 -[UITableMetricsAdapter _updateSharedSectionMetricsForListGeometry:] 7 UIKitCore +0x201da8 -[UITableMetricsAdapter tableBackgroundColor] 8 UIKitCore +0x1643a44 ___39-[UITableView _applyAppearanceDefaults]_block_invoke 9 UIKitCore +0x196f3d0 +[UIView _performSystemAppearanceModifications:] 10 UIKitCore +0x1643978 -[UITableView _applyAppearanceDefaults] 11 UIKitCore +0x202854 -[UITableView _setupTableViewCommon] 12 UIKitCore +0x1643760 -[UITableView initWithFrame:style:] 13 Application +0x30b6a40 closure #1 in variable initialization expression of MyAppClass.tableView 14 Application +0x30b6ef0 MyAppClass.init(frame:) Has anyone else seen something like this? Any insights or advice is much appreciated, thank you!
Replies
1
Boosts
0
Views
156
Activity
Feb ’26
The Nightmare of Small Toolbar Icons
When building in Xcode on MacOS Tahoe, it seems it is no longer possible to dynamically specify a "small" size toolbar for NSToolbar/NSToolbarItem. It works in MacOS code compiled and linked on earlier systems. I don't want to use "SFSymbol", or "templates". I have over 60 custom-made .png toolbars, in individual Image Set files, at the previous requisite sizes of 24x24 / 48x48, and 32x32 / 64x64. Sure -- I can configure an NSToolbar with whatever size .png assets I want. I just can't dynamically switch between the two groups of sizes. According to the Apple Coding Assistant, the only solution is to change the image names of each of the NSToolbarItems at runtime. OK -- but even when attempting that, the NSToolbarItems refuse to take on their smaller size... ...unless: they are attached to a custom view NSToolbarItem with an NSButton of style "Bevel". I have about 10 of those, and YES -- I CAN change those to a "small" size. Is this REALLY what I'm forced to do?! The Apple Coding Assistant just runs me around in circles, making coding suggestions that include properties that don't exists. I've gone around and around on these issues for over a week -- it can't be this hard, right? Is there no way to make multiple NSToolbar objects, one for "large" and one for "small"?
Replies
1
Boosts
0
Views
246
Activity
Feb ’26
Gesture & SimultaneousGesture interfere with ScrollView behaviour.
I have faced a problem while I was trying to implement a reorder drag & drop view. I found that when I add any kind of .gesture or .simultaneousGesture, a ScrollView's scrolling behavior wasn't working properly (does not scroll at all). ScrollView(.vertical, showsIndicators: false) { ForEach($items) { $item in EditorCard(stepDetails: item) .simultaneousGesture( customCombinedGesture(item) ) } } This ScrollView worked fine with .onLongPressGesture(), however, I wanted to use custom gestures sequences.
Replies
0
Boosts
0
Views
158
Activity
Mar ’26
.icon files and "imageNamed:"
Composer icons can be loaded with NSImage's imageNamed: but I haven't figured out how to make it load any variation other than the light style. Is this even possible? Thank you!
Replies
0
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0
Views
103
Activity
1w
Technical risks of swapping between UITableViewDiffableDataSource and UITableViewDataSource on UITableView
I am currently migrating an app from the classic UITableViewDataSource to UITableViewDiffableDataSource. In certain complex cases, I find myself needing to toggle between the UITableViewDataSource and UITableViewDiffableDataSource on a single UITableView instance. Apple's official documentation for UITableViewDiffableDataSource contains a strict warning: "Do not change the dataSource on the table view after you configure it with a diffable data source. If the table view needs a new data source after you configure it initially, create and configure a new table view and diffable data source." I’m seeking clarification on: Internal State: What specific UIKit caching or internal state is corrupted if we nil out the diffable source and re-assign a classic one? Background Processes: Does the background diffing engine pose a risk (race conditions/crashes) if the source is swapped while a diff is calculating? The "Safe" Reset: If swapping is truly necessary, is there a verified cleanup sequence (e.g., clearing snapshots first) that avoids the need to recreate the UITableView entirely?
Replies
0
Boosts
0
Views
54
Activity
6d