How to convert datas in Swift from NSArray to Dictionary? - swift

Question

I need convert NSArray to Dictionary, but don't know how can I do it.
After fetch request I have result in NSArray. This my request:
var results: NSArray = []
func fetchUpdateAttendee() {
let fetchRequest = NSFetchRequest<NSFetchRequestResult>(entityName: "Attendee")
let predicate = NSPredicate(format: "needUpdate != false")
fetchRequest.predicate = predicate
results = try! DBWorker.context.fetch(fetchRequest) as NSArray
results.forEach { result in
print(result)
}
var results: NSArray = []
print(results) give me
<Attendee: 0x60c000097750> (entity: Attendee; id: 0x60c000422200 <x-coredata:///Attendee/t9E88E2EE-9258-4FAE-AF80-9B036838C6D631> ; data: {
address = "1411 E 31st St";
affiliation = "";
attendeeType = nil;
city = Aguanga;
degree = MD;
email = "";
fax = "";
firstName = Oliver1212;
fullStateLicense = "";
id = nil;
lastName = Aalami;
meeting = nil;
needUpdate = 1;
phone = "";
signature = nil;
signatureTimeStamp = nil;
specialty = Surgery;
state = CA;
stateLicense = "";
status = nil;
timeStamp = nil;
zip = 92536;
})
I need to put these datas to: let dic4Attendee: [String: Any] = [:]

Answer 1

This is a Core Data NSManagedObject subclass, so the code is supposed to be
var results = [Attendee]()
func fetchUpdateAttendee() {
let fetchRequest = NSFetchRequest<Attendee>(entityName: "Attendee")
let predicate = NSPredicate(format: "needUpdate == TRUE")
fetchRequest.predicate = predicate
do {
results = try DBWorker.context.fetch(fetchRequest)
results.forEach { result in
print(result)
}
} catch { print(error) }
}
never use NSArray to represent an array of NSManagedObject subclass.
Add a property dictionaryRepresentation in the Attendee class and return the key value pairs you need for example
var dictionaryRepresentation : [String:Any] {
return ["address" : address,
"affiliation" : affiliation,
"city" : city
// and so on
]
}
then map the array
let mappedArray = results.map{ $0.dictionaryRepresentation }