Swift, use string name to reference a variable - string

Question

Plan to use a string value to for referencing which variable I want to update. Combining string from a few different user selected sources. To many possibilities to use if/case statements. Thanks in advance
var d1000: Int = 0
// ...
var d1289: Int = 0
// ...
var d1999: Int = 0
var deviceIDtype: Character = "d" // button press assigns some value, d used for example
var deviceIDsection: String = "12" // button press assigns some value, 12 used for example
var deviceID: String = "89" // button press assigns some value, 89 used for example
var ref:String = ""
func devName(dIDt:Character, dIDs: String, dID: String) -> String {
var combine: String = String(dIDt) + (dIDs) + (dID)
return (combine)
}
ref = devName(deviceIDtype, dIDs: deviceIDsection, dID: deviceID) // ref equals d1289 in this example
// d1289 = 1234 // trying to set this using the ref variable value, failed attempts below
/(ref) = 1234 // set d1289 variable to equal "1234"
"/(ref)" = 1234 // set d1289 variable to equal "1234"
get(ref) = 1234 // set d1289 variable to equal "1234"
get.ref = 1234 // set d1289 variable to equal "1234"

Answer 1

It is possible!!!
let index = 1000
if let d1000 = self.value(forKey: "d\(index)") as? Int {
// enjoy
}

Answer 2

How about using a dictionary, [String : Int]?
This will allow you to achieve what you want - storing values for different keys.
For example, instead of using
var d1000 = 0
var d1289 = 0
var d1999 = 0
You could use
var dictionary: [String : Int] = [
"d1000" : 0,
"d1289" : 0,
"d1999" : 0
]
To store a value in the dictionary, just use
dictionary[key] = value
//for example, setting "d1289" to 1234
dictionary["d1289"] = 1234
and to get the value from the dictionary, use
let value = dictionary[key]
//for example, getting the value of "d1289"
let value = dictionary["d1289"]
So, you could use something like this
//initialize your dictionary
var myDictionary: [String : Int] = [:]
//your key initialization data
var deviceIDtype: Character = "d"
var deviceIDsection: String = "12"
var deviceID: String = "89"
var ref: String = ""
//your code
func devName(/*...*/){/*...*/}
ref = devName(/*...*/)
//set the key ref (fetched from devName) to 1234
myDictionary[ref] = 1234
Just as a side note, you could really clean some of your code
func devName(type: Character, section: String, id: String) -> String{
return String(type) + section + id
}
//...
let key = devName(deviceIDtype, section: deviceIDsection, id: deviceID)
let value = 1234
myDictionary[key] = value