iOS：删除所有核心数据 Swift

在iOS开发中，有时候我们需要删除所有核心数据。核心数据是指我们应用程序中存储的重要数据，如用户信息、设置、缓存等。在Swift中，我们可以通过一些简单的步骤来实现这个功能。接下来，我将向大家介绍如何使用Swift来删除所有核心数据，并提供一个案例代码供大家参考。

swift
import CoreData
func deleteAllCoreData() {
    let appDelegate = UIApplication.shared.delegate as! AppDelegate
    let managedContext = appDelegate.persistentContainer.viewContext
    let fetchRequest = NSFetchRequest(entityName: "YourEntityName")
    let batchDeleteRequest = NSBatchDeleteRequest(fetchRequest: fetchRequest)
    do {
        try managedContext.execute(batchDeleteRequest)
        try managedContext.save()
    } catch {
        print("Error deleting all core data: \(error.localizedDescription)")
    }
}

swift
import UIKit
import CoreData
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    var window: UIWindow?
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        deleteAllCoreData()
        return true
    }
    func deleteAllCoreData() {
        let appDelegate = UIApplication.shared.delegate as! AppDelegate
        let managedContext = appDelegate.persistentContainer.viewContext
        let fetchRequest = NSFetchRequest(entityName: "Task")
        let batchDeleteRequest = NSBatchDeleteRequest(fetchRequest: fetchRequest)
        do {
            try managedContext.execute(batchDeleteRequest)
            try managedContext.save()
        } catch {
            print("Error deleting all core data: \(error.localizedDescription)")
        }
    }
}