saoudrizwan

import Disk

do {
    try Disk.save(posts, to: .documents, as: "posts.json")
    let retrieved = try Disk.retrieve("posts.json", from: .documents, as: [Post].self)
} catch {
    // ...
}

saoudrizwan

// Remove messages.json from Documents Directory
Storage.remove("messages.json", from: .documents)

// Or just clear the Documents Directory entirely
Storage.clear(.documents)

// We can even check if our file exists in the specified directory
if Storage.fileExists("messages.json", in: .documents) {
    // we have messages to retrieve
}

saoudrizwan

let messagesFromDisk = Storage.retrieve("messages.json", from: .documents, as: [Message].self)

saoudrizwan

var messages = [Message]()

for i in 1...4 {
    let newMessage = Message(title: "Message \(i)", body: "...")
    messages.append(newMessage)
}

Storage.store(messages, to: .documents, as: "messages.json")

saoudrizwan

struct Message: Codable {
    let title: String
    let body: String
}

saoudrizwan

import Foundation

public class Storage {
    
    fileprivate init() { }
    
    enum Directory {
        // Only documents and other data that is user-generated, or that cannot otherwise be recreated by your application, should be stored in the <Application_Home>/Documents directory and will be automatically backed up by iCloud.
        case documents
        

saoudrizwan

sampleImageView.addTapGestureRecognizer {
    print("image tapped")
}

saoudrizwan

import UIKit

extension UIView {
    
    // In order to create computed properties for extensions, we need a key to 
    // store and access the stored property
    fileprivate struct AssociatedObjectKeys {
        static var tapGestureRecognizer = "MediaViewerAssociatedObjectKey_mediaViewer"
    }
    

saoudrizwan

func getDocumentsURL() -> URL {
    if let url = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first {
        return url
    } else {
        fatalError("Could not retrieve documents directory")
    }
}

saoudrizwan

let fileManager = FileManager()

func savePostsToDisk(posts: [Post]) {
    // 1. Create a url for documents-directory/posts.json
    let url = getDocumentsURL().appendingPathComponent("posts.json")
    // 2. Endcode our [Post] data to JSON Data
    let encoder = JSONEncoder()
    do {
        let data = try encoder.encode(posts)
        // 3. Check if posts.json already exists...