👀 Views: 492 💬 Answers: 1 📅 Created: 2025-09-13

Objective-C Swift Core Data

I need help solving I'm attempting to set up I'm collaborating on a project where I'm working on a project and hit a roadblock... Currently developing a migration strategy to convert a large codebase from Objective-C to Swift. This legacy code heavily relies on Core Data and includes numerous complex relationships between objects. During the refactoring phase, I am facing challenges with bridging the Objective-C types correctly, especially with custom classes that implement NSCoding and NSCopying. For instance, I have a managed object subclass that looks like this: ```objective-c @implementation MyManagedObject - (void)encodeWithCoder:(NSCoder *)coder { [coder encodeObject:self.someString forKey:@"someString"]; } - (instancetype)initWithCoder:(NSCoder *)coder { self = [super init]; if (self) { self.someString = [coder decodeObjectForKey:@"someString"]; } return self; } @end ``` While converting this class, I tried to use the `@objc` attribute but ran into issues with dynamic properties. Attempting to access these properties from Swift results in a runtime error stating that the property cannot be found. Furthermore, I configured my bridging header like so: ```objective-c #import "MyManagedObject.h" ``` In Swift, I attempt to access the properties like this: ```swift let myObject = MyManagedObject() print(myObject.someString) // Runtime error here ``` What could be the cause of this bridging issue? Is there an optimal way to manage Objective-C properties when transitioning to Swift, especially when dealing with Core Data entities? Have others found specific patterns or configurations that help in this scenario? Any insights or best practices would be highly appreciated. Any help would be greatly appreciated! The project is a service built with Objective-C. I'd be grateful for any help. Could someone point me to the right documentation? I'm using Objective-C latest in this project.