I'm getting an error when trying to compile my project using xcode 12. The compiler is unable to type-check this expression in reasonable time; try breaking up the expression into distinct sub-expressions The compiler hints that the error is at the last modifier .offset() in this snippet: func circle(geometry: GeometryProxy, index: Int) -> some View {     return Circle()       .fill(Color.mediumGray)       .frame(width: geometry.size.width / 5, height: geometry.size.height / 5)       .scaleEffect(!self.isAnimating ? 1 - CGFloat(index) / 4 : 0.1 + CGFloat(index) / 5)       .offset(y: geometry.size.width / 10 - geometry.size.height / 2)   }

Hi! I created a custom modifier which looks like this: extension View {     func onTapGestureWithFeedback(action: @escaping () -> Void) -> some View {         let impact = UIImpactFeedbackGenerator(style: .medium)         let defaults = UserDefaults.standard         let reduceHaptics = defaults.object(forKey:"reduceHaptics") as! Bool         return self.onTapGesture {             if !reduceHaptics { impact.impactOccurred() }             action()         }     } } For some reason, while I use this modifier on a view, like this struct TestView: View {     var body: some View {         Text("Hello World")             .onTapGestureWithFeedback {                 print("test")             }     } } the SwiftUI Preview breaks. This is the error I'm getting in the diagnosis window: MessageSendingError: Connection interrupted: send message to agent. This used to work fine in Xcode 11. Please find attached the crash log as well. Crash Log - https://developer.apple.com/forums/content/attachment/de0b6862-77af-4323-a22a-f58d61983022

Hi, I'm working on an app where I'm using Core Data to store some information on persistent storage. I'm having issues understanding and deciding how to deal with read/write operations. At the moment, I have a QuoteGroupStorageManager class that wraps most of the operations in easy to use functions. You can see it below. You can see that I'm fetching on the main context, and editing/deleting/inserting (apart from the addQuoteToGroup which I do on the mainContext because I use relationships, and the quoteGroup belongs on the mainContext - otherwise I get an error with illegal... object belongs to a diff context). My question is, am I doing things right, in terms of performance? I'm using SwiftUI for the UI and when I delete a QuoteGroup for example, the UI is freezing for a while, until I make a new deletion. I'm wondering if it's because of the mixture of backgroundContext and mainContext. Which one should I use? QuoteGroupStorageManager.swift - https://developer.apple.com/forums/content/attachment/9226d66b-9e56-46ed-a734-389927340864 Thanks!