string - Swift，使用字符串名称来引用变量

Question

计划使用字符串值来引用我要更新的变量。组合来自几个不同用户选择源的字符串。使用 if/case 语句的多种可能性。提前致谢

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

这是可能的!!!

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