如何在Swift代码中获取引用参数的变量名？

Question

var bankAccountBalance = 3000000.00
var macbookpro = 191000.00
var iphone6sPlus = 59000.00
var newSweetHome = 3500000.00
var amountRequired = 00.00

func purchaseItem1(currentBalance : Double, itemPrice : Double) ->Double {
    if(itemPrice<=currentBalance)
    {
        print("Purchased item for :\(itemPrice)")
        print("Your current outstanding Account balance is \(currentBalance)")

        return currentBalance-itemPrice   
    }
    else {
        amountRequired = itemPrice - currentBalance

        print("You dont have enough account balance to purchase this item :( ")
        print("You need \(amountRequired)Rs in your bank")
        return amountRequired
    }
}

purchaseItem1(currentBalance: bankAccountBalance, itemPrice: macbookpro)
purchaseItem1(currentBalance: bankAccountBalance, itemPrice: iphone6sPlus)
purchaseItem1(currentBalance: bankAccountBalance, itemPrice: newSweetHome)

Answer 1

你不能。您是否考虑过使用字典，例如

let items = ["MacBook Pro": 191000.0, "iPhone 6S Plus": 59000.0"]

或者你应该真的在某种数据结构中编码这些信息，例如

struct Item {
    var name: String
    var price: Double
}

let items = [
    Item(name: "MacBook Pro", price: 191000), 
    Item(name: "iPhone 6S Plus", price: 59000)
]