使用Swift在字符串中插入应用程序版本？

我在Swift中有一些代码，我想插入应用程序的属性（版本）。这可能吗

var parameters: [String : AnyObject] = [
    "offerSef" : url,
    "userGuid" : user.userGuid,
    "bottlesQty" : quantityIndex + 1,
    "appId" : "iOS" + /* WANT TO INSERT APP VERSION HERE */,
    "creditCardId" : payment.paymentID,
    "billingAddressId" : payment.billingAddressId,
    ]

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注意：这不是重复的，因为我的问题是关于如何使用Swift（与Objective-C相反）以正确的方式进行操作。

这是我从这里的另一个问题拼凑而成的答案，但我也想知道是否有人对此有意见或知道更好/更干净的方法

    //First get the nsObject by defining as an optional anyObject
    if let nsObject: AnyObject? = NSBundle.mainBundle().infoDictionary["CFBundleShortVersionString"] {

        //Then just cast the object as a String, but be careful, you may want to double check for nil
        if let version = nsObject as String {
            appId = appId + "-" + version
        }
    }

    var parameters: [String : AnyObject] = [
        "offerSef" : url,
        "userGuid" : user.userGuid,
        "bottlesQty" : quantityIndex + 1,
        "appId" : appId,
        "isMobile" : true,
        "creditCardId" : payment.paymentID,
        "billingAddressId" : payment.billingAddressId,
    ]