Difficulty Fetching Images from a Remote API in iOS 17 with URLSession and Caching Issues
I'm stuck on something that should probably be simple. I'm prototyping a solution and Hey everyone, I'm running into an issue that's driving me crazy. I'm deploying to production and Quick question that's been bugging me - I'm working on a project and hit a roadblock. I'm stuck on something that should probably be simple. I'm having trouble fetching images from a remote API in my iOS 17 application. I'm using `URLSession` to handle the network requests, but the images are sometimes not displaying, and I suspect it might be due to caching issues. Here is the code I'm using to fetch the images: ```swift let url = URL(string: "https://example.com/image.jpg")! let task = URLSession.shared.dataTask(with: url) { data, response, error in if let error = error { print("Error fetching image: \(error)") return } guard let data = data else { return } DispatchQueue.main.async { self.imageView.image = UIImage(data: data) } } task.resume() ``` I have implemented image caching using a simple dictionary, but it seems that images are sometimes re-fetched even when they should be cached. Here’s how I handle caching: ```swift var imageCache = [String: UIImage]() func fetchImage(urlString: String) { if let cachedImage = imageCache[urlString] { self.imageView.image = cachedImage return } let url = URL(string: urlString)! let task = URLSession.shared.dataTask(with: url) { data, response, error in if let error = error { print("Error fetching image: \(error)") return } guard let data = data, let image = UIImage(data: data) else { return } self.imageCache[urlString] = image DispatchQueue.main.async { self.imageView.image = image } } task.resume() } ``` The issues I'm encountering are that sometimes the `fetchImage` function doesn't seem to hit the cache, and I'm logging errors like `Error fetching image: The Internet connection appears to be offline.` despite having a stable connection. Also, images sometimes appear blank or take a long time to load. I'm using the latest Swift and Xcode 15. Are there any best practices or common pitfalls in handling image caching with `URLSession` that I might be missing? Any suggestions for improving the performance of image fetching would be greatly appreciated. For context: I'm using Swift on macOS. Is there a better approach? I'm working on a web app that needs to handle this. Thanks in advance! My development environment is Ubuntu. How would you solve this? The stack includes Swift and several other technologies. What would be the recommended way to handle this? I'm using Swift 3.10 in this project. I'd be grateful for any help. For context: I'm using Swift on Ubuntu 20.04. Am I missing something obvious? I'm coming from a different tech stack and learning Swift. Is this even possible?