“SwiftData inheritance relationship”

Like the title says, I've realised that when I try to use filter or sort on properties that aren't standard supported data types i.e. Using a transformable or a value type like an enum, I seem to be getting the following crash... SwiftData/DataUtilities.swift:1140: Fatal error: Unexpected type for Expansion: Optional Xcode expands and shows me when trying to access the wrapped value it's crashing. I'm assumung that the query property wrapper can't handle these custom data types @Query private var items: [Item] { get { _items.wrappedValue <--- Crash here } } Which seems to be pointing to a transferable property in one of my models. Below are my two models i'm using. enum Priority: Int, Codable, Identifiable, CaseIterable { case low case medium case high var title: String { switch self { case .low: return Low case .medium: return Medium case .high: return High } } var image: Image? { switch self { case .medium: return Image(systemName: exclamationmark.2) case .high: return Image(systemName: exclamat

struct Wrapper<Value> { let value : Value } extension Wrapper : Equatable where Value : Equatable { static func ==(lhs: Wrapper, rhs: Wrapper) -> Bool { return lhs.value == rhs.value } }Entering the above code in a Playground in Xcode Version 9.0 beta (9M136h) gives the following error:error: MyPlayground.playground:1:1: error: extension of type 'Wrapper' with constraints cannot have an inheritance clauseextension Wrapper : Equatable where Value : Equatable {Isn't this supposed to work in Swift 4?

I have a couple of issues. The first is I want to be able to do thisprotocol A { static func someMethod() -> Self?}extension A { static func someMethod() -> Self? { ... }}protocal B: A {}extension B { static func someMethod() -> Self? { ... call protocol A's someMethod ... }}Is there a way to do this? I need to add some additional behavior to protocol B and do all of the code in protocol A's protocol extension. The best I could cope up with is have exension A have a doSomeMethod() method that does the actual work, then have both A and B call that. Is there a way to do the equivalent of super.someMethod() which doesn't work because it's not a class.

It might be a trivial issue, but I am not able to solve it. I have the following function in an objective-c superclass:+(instancetype) lineWithNumber: (NSString*)number;and I am trying to inherit in a swift subclass with:class func lineWithNumber(number:NSString)->LineYet if I put the override in front I get error:Method does not override any method from its superclassif on the other hand I omit the override keyword it reports:Method 'lineWithNumber' with Objective-C selector 'lineWithNumber:' conflicts with method 'lineWithNumber' from superclass 'Line' with the same Objective-C selectorI also tried replacing instancetype with Line as in the inheited function with no change.Calls in other classe would regularly access the Swift function if it were not for the error. What might be the problem, and is there a way to check how Xcode translates Objective-c signatures when they are imported in Swift?

I have defined the following class and subclass:import Foundation class Node { var key : String private weak var parent: Node? private var children: [Node] = [] init(key : String) { self.key = key } func addChildNode(child: Node) { children.append(child) child.parent = self } func rootNode() -> Node { var node = self while node.parent != nil { node = node.parent! } return node } } class SubNode : Node { var time : [Double] = [] }When using the subclass and the method rootNode inherited, this returns the class Node and not the subclass SubNode. Therefore, I can not access the time property. One option is of course to cast explicitily the outcome of the rootNode as SubNode. But this is not very elegant. Any other idea?var a = SubNode(key: a) a.time = [11,2,3] var b = SubNode(key: b) var c = SubNode(key: c) a.addChildNode(b) b.addChildNode(c) c.rootNode() // c.rootNode can not access time unles casted as SubNode

I have a main app with the entitlements: com.apple.security.app-sandbox com.apple.security.hypervisor and a helper app with the entitlements com.apple.security.app-sandbox com.apple.security.inherit According to the documentations, if I start the helper app with NSTask, it should inherit the sandbox and I do see that for file accesses. However, when I try to use Hypervisor.framework, I get HV_DENIED. If I try to add com.apple.security.hypervisor to the helper app, then the NSTask spawned process crashes with Could not set sandbox profile data: Operation not permitted (1). I believe this is a bug and have submitted FB8921623 In the meantime, is there a workaround other than disabling App Sandbox or sticking to a single app (not possible for our application)?

ViewA has ModelA ViewA loads into the memory. ModelA is queried and shown in the list. ModelA has an array of ModelB which is faulted for the memory. When you select an item in the list in ViewA ViewB is loaded and ModelB information is displayed. When you pop back to ViewA, ModelB is still in the memory since it is contained within the array of ModelA. how could i make this memory efficient by releasing ModelB from the memory. should I refetch everything? or is there another method?

I have a werid case that shouldn't happen according to https://forums.developer.apple.com/forums/thread/706390 I have an audio unit which runs in FCP and I want it to launch a sandboxed app as a child process. If I sign the child app with just com.apple.security.app-sandbox entitlement it crashes with SYSCALL_SET_PROFILE error. According to the article referenced above: This indicates that the process tried to setup its sandbox profile but that failed, in this case because it already has a sandbox profile. This makes sense because audio units run in a sandboxed environment (in AUHostingService process). So I added com.apple.security.inherit to the entitlements plist and now I get Process is not in an inherited sandbox. error. According to the article referenced above: Another cause of a trap within _libsecinit_appsandbox is when a nonsandboxed process runs another program as a child process and that other program’s executable has the com.apple.security.app-sandbox and com.apple.security.inherit entit