Making a Dictionary in Swift - ios

Question

I have an object taken from Parse and I want to save its columns into a Dictionary or something else (if it's better).
I want to have a Dictionary like this: ["name" : "Mike", "lastname" : "vorisis", "id" : "advsas"]
Below is the code I use to take my results:
func queryEvents() {
let query = PFQuery(className: "eventController")
query.limit = 1000
query.includeKey("idEvent")
query.includeKey("eventType")
query.includeKey("idEvent.idMagazi")
query.findObjectsInBackgroundWithBlock { (objects, error)-> Void in
if let objects = objects {
for object in objects {
var post = object["idEvent"] as? PFObject
var post2 = post!["idMagazi"]
print("retrieved related post: \(post2["name"]!)")
}
}
}
}

Answer 1

Something else (if it's better) is a custom class.
Change the type of idMagazi to the real type.
class Event {
let post : PFObject
let name : String
let idMagazi : String
init(object : PFObject) {
self.post = object
self.name = object["name"] as! String
self.idMagazi = object["idMagazi"] as! String
}
}
And use it
...
if let objects = objects as? [PFObject] {
var events = [Event]()
for object in objects {
let post = Event(object: object)
events.append(post)
print("retrieved related post: \(post.name)")
}
}
...

Answer 2

In Swift Dictionary<T,V> is equivalent to [T: V]. Type is inferred if not explicitly declared.
Empty dictionary creation (all equivalent):
var dict1: Dictionary<String, String> = [:]
var dict2: [String: String] = [:]
var dict3 = Dictionary<String, String>()
var dict4 = [String: String]()
Dictionary with values (all equivalent):
var dict5 = ["Foo": "Bar", "Foo1": "Bar1", "Foo2": "Bar2"]
var dict6: Dictionary<String, String> = ["Foo": "Bar", "Foo1": "Bar1", "Foo2": "Bar2"]
var dict7: [String: String] = ["Foo": "Bar", "Foo1": "Bar1", "Foo2": "Bar2"]
Add values to an existing dictionary:
dict["Foo"] = "Bar"
In your specific scenario, you could use this:
let dict = ["name" : name, "lastname" : lastname , "id" : id]
where name, lastname and id are String variables.
Update based on your own answer:
Having this struct:
struct Event {
var nameEvent: String
var nameMagazi: String
}
You can use this approach, that avoid having an external index and uses an array instead of a dictionary for storing the results.
var events: [Event]?
guard let objects = objects else { return }
events = objects.map { object in
let post = object["idEvent"] as? PFObject
let post2 = post!["idMagazi"] as? PFObject
let nameEvent = post!["name"] as! String
let idEvent = post?.objectId
let nameMagazi = post2!["name"] as! String
return Event(nameEvent: nameEvent , nameMagazi: nameMagazi)
}

Answer 3

I finally found it out how can i do it.
I use a struct with what I want like this:
var userDictionary = [Int : Event]()
struct Event {
var nameEvent: String
var nameMagazi: String
}
And then i use this:
if let objects = objects {
for object in objects {
let post = object["idEvent"] as? PFObject
let post2 = post!["idMagazi"] as? PFObject
let nameEvent = post!["name"] as! String
let idEvent = post?.objectId
let nameMagazi = post2!["name"] as! String
self.events[self.i] = Event(nameEvent: nameEvent , nameMagazi: nameMagazi)
self.i += 1
}
print(self.events[1]!.nameEvent)
}
Thank you all for your answers!

Answer 4

Create dictionary like this:
var dict = ["name" : "Mike", "lastname" : "vorisis" , "id" : "advsas"]
OR
var dict = Dictionary<String,String>
dict.setValue("Mike", forKey: "name")

Answer 5

A dictionary can be made using this line:
var dictionaryArray: [Dictionary<String,String,Int>] = []
Then values can be added by appending them to the dictionary.
dictionaryArray.append(["name" : "Mike", "lastname" : "vorisis" , "id" : "advsas"])
Hope this helps.