iOS -获取应用程序安装的唯一ID

import UIKit

if let vendorID = UIDevice.current.identifierForVendor?.uuidString {
    print(vendorID)
}

import UIKit
import Security

class KeychainManager {
    private let keychainKey = "your.keychain.key"

    func getOrCreateUniqueID() -> String {
        var uniqueID: String?

        if let id = getKeychainItem(keychainKey) {
            uniqueID = id
        } else {
            uniqueID = UUID().uuidString
            saveKeychainItem(uniqueID!, key: keychainKey)
        }

        return uniqueID!
    }

    private func getKeychainItem(_ key: String) -> String? {
        let query: [String: Any] = [
            kSecClass as String: kSecClassGenericPassword,
            kSecAttrAccount as String: key,
            kSecReturnData as String: kCFBooleanTrue!,
            kSecMatchLimit as String: kSecMatchLimitOne
        ]

        var dataTypeRef: AnyObject?
        let status = SecItemCopyMatching(query as CFDictionary, &dataTypeRef)

        if status == errSecSuccess {
            return String(data: dataTypeRef! as Data, encoding: .utf8)
        } else {
            return nil
        }
    }

    private func saveKeychainItem(_ value: String, key: String) {
        let query: [String: Any] = [
            kSecClass as String: kSecClassGenericPassword,
            kSecAttrAccount as String: key,
            kSecValueData as String: value.data(using: .utf8)!
        ]

        SecItemDelete(query as CFDictionary)

        SecItemAdd(query as CFDictionary, nil)
    }
}

let keychainManager = KeychainManager()
let uniqueID = keychainManager.getOrCreateUniqueID()
print(uniqueID)