How to log and delete keychain items from your iOS app?

keychain.swift

func iterateKeychainItems(log: Bool, delete: Bool) {
    let secItemClasses = [
        kSecClassGenericPassword,
        kSecClassInternetPassword,
        kSecClassCertificate,
        kSecClassKey,
        kSecClassIdentity
    ]

    if (log) {
        for secItemClass in secItemClasses {
            let query: [String: Any] = [
                kSecReturnAttributes as String: kCFBooleanTrue,
                kSecMatchLimit as String: kSecMatchLimitAll,
                kSecClass as String: secItemClass
            ]

            var result: AnyObject?
            let status = SecItemCopyMatching(query as CFDictionary, &result)
            if status == noErr {
                print(result as Any)
            }
        }
        print("AppUsageMetadata.iterateKeychainItems ended.")
    }

    if (delete) {
        for secItemClass in secItemClasses {
            let dictionary = [kSecClass as String:secItemClass]
            SecItemDelete(dictionary as CFDictionary)
        }
    }
}