Swift NSNumberFormatter [重复]

Question

我正在阅读我的速成书并在进行过程中进行构建。我遇到了这个 NSNumberFormatter 类的问题。我不断收到错误： 《预期宣言》 在我的声明之后

formatter.numberStyle = NSNumberFormatterStyle.CurrencyStyle

我已经多次重写我的代码，并且我将每个字母都与我的书进行了比较，但我不明白我哪里出错了

当我尝试运行该函数时：

account1.deposit(depositAmount)

我再次收到“预期声明”的错误消息

这是我的代码：

    //: Playground - noun: a place where people can play

    import Cocoa
    import Foundation

    public class Account
    {
    public var name: String = ""
    public var balance: Double = 0.0


    public init(name: String, balance: Double)
    {
        self.name = name
        if balance > 0.0
        {
            self.balance = balance
        }
    }

    public func deposit(amount: Double)
    {
        if amount > 0.0
        {
            balance = balance + amount
        }
    }

    public func withdraw(amount: Double)
    {
        if balance - amount >= 0.0
        {
            balance = balance - amount
        }
    }



   let formatter = NSNumberFormatter()
  formatter.numberStyle = NSNumberFormatterStyle.CurrencyStyle


    func formatAccountString(account: Account) -> String {
        return account.name + "'s balance: " + formatter.stringFromNumber(account.balance)!
    }




    let account1 = Account(name: "Jane Green", balance: 50.00)
    let account2 = Account(name: "John Blue", balance: -7.53)

   //println(formatAccountString(account1))

    var depositAmount = 25.53
    account1.deposit(depositAmount)
    account2.deposit(depositAmount)

    println("depositing " + formatter.StringFromNumber(depositAmount) + " into account1\n")
    println("depositing " + formatter.StringFromNumber(depositAmount) + " into account1\n")
    }

提前谢谢你！

Answer 1

问题很可能出在formatter.numberStyle = NSNumberFormatterStyle.CurrencyStyle 的位置。您不能从类级别运行代码。将其移至 init。