What is diffrence between Objective-C NSCache.m and Foundation NSCache?
What is difference between Objective-C NSCache.m and Foundation NSCache?
When I use NSCache in Swift, does it use Foundation's NSCache or Objective-C's?
If you "jump to definition" about NSCache in Swift then Xcode shows the following file. It imports <Foundation/NSObject.h>, so I think it's using Foundation's NSCache, but the code is also ObjC, so I'm confused.
iOS and other Apple platforms use the closed-source Apple version of Foundation, which is neither of the links you've provided.
The first link is swift-corelibs-foundation, which is a reimplementation of much of Foundation for non-Apple platforms (particularly Linux) in Swift. It is not currently used on any Apple platform, but is primarily managed by Apple along with community contributors.
Your second link is from GNUStep which is an open-source reimplementation of Cocoa that Apple is not involved with. The full project is an implementation of the OpenStep API, which was developed by NeXT. It's an interesting project, but has no real intersection with the Apple ecosystem. It pre-dates the Apple acquisition, and is much closer to NeXTSTEP than to iOS.
Your screenshot is the correct version: the proprietary, Objective-C version of Foundation. The source code for that is not available, only the headers. If your goal is to see the actual implementation of NSCache on iOS, that's not available. The best you can do is reverse-engineer it with something like Hopper. (Even with that, it's usually easiest to reverse engineer the macOS version, and assume the iOS version is the same.)
The version in swift-corelibs-foundation is intended to have very similar behavior to the Apple version, so is a fairly good way to determine what the behavior is supposed to be, but the implementation is generally completely different and may not behave the same in all corner cases.
- Attempts to access rapidAPI yahoo finance give me error 403 through swift
- Inheritance and Visibility in Swift
- Update values in a dictionary based on changes made to another dictionary
- Possible to have two different kinds of objects in a SwiftUI selectable List?
- How to generate SymmetricKey from password
- How do I create a singleton reference-type in Swift 6?
- Handling authentication for multiple apps under the same account - iOS
- How to Access Magento Rest API in iOS swift 4
- Expand parent view to encompass children with offset
- Placeholder text color of a TextField is not getting changed if the text is a link in SwiftUI
- How to customize a NavigationSplitView with a Title in SwiftUI
- iOS bottom sheet with fraction detents UIKit
- Swift async let Task throws Cancellation Exception if not Awaited
- SwiftUI: Global Overlay That Can Be Triggered From Any View
- How do I set the WorldAlignment for Apple's RoomPlan Session to be gravityAndHeading?
- How to implement UIViewControllerTransitioningDelegate in UIStoryboardSegue?
- How to add a FlutterViewController to a UIViewController
- How can I do comparison of a value Optional([:])
- How to add a timeout to an awaiting function call
- Swift - Wrong date format (JSON .NET)
- Swift async/await implement refresh using a task
- How to get "everything after the ://" in iOS `URL`
- SwiftUI - Animation when hiding view
- `LongPressGesture` not registering on iOS 18
- Getting error "No such module" using Xcode, but the framework is there
- change UITabBar.appearance().tintColor at runtime
- Can I encode and decode a JSON on the GPU using MetalKit?
- Opening app's notification settings in the settings app
- How to add padding to a NSMutableAttributedString?
- SceneKit dynamic object falls through static floor