控制台中打印的意外变量结果

@IBAction func addAccountButton(_ sender: Any) {

    // Pop alert to add new account

    let addAcctAlert = UIAlertController(title: "Create New Account", message: "Please name your new account", preferredStyle: UIAlertControllerStyle.alert)

    addAcctAlert.addTextField{ (accountTextField) in
        accountTextField.placeholder = "Enter new account name"
        accountTextField.keyboardType = .`default`
    }

    addAcctAlert.addAction(UIAlertAction(title: "Continue", style: UIAlertActionStyle.destructive, handler: { action in

        // Create new Account with name, balance, isCurrent, save to disk

        let newAccount = Account()
        newAccount.name = self.accountTextField.text!
        newAccount.isCurrent = false
        newAccount.highWaterBalance = 0.0

        // Adds the newly created account

        Account.add(thisAccount: newAccount)

        let realm = try! Realm()
        let currentAccounts = realm.objects(Account.self)

        print ("In AddAccountButton func:")
        print("There are \(String(describing: currentAccounts.count)) Account objects")

        for acct in currentAccounts{
            print("acct.name is \(acct.name)")
            print("acct.highWaterBalance is \(String(describing: acct.highWaterBalance))")
            print("acct.isCurrent is \(String(describing: acct.isCurrent))")

        }
    }))

    addAcctAlert.addAction(UIAlertAction(title: "Cancel", style: UIAlertActionStyle.cancel, handler: nil))

    self.present(addAcctAlert, animated: true, completion: nil)

}

下面是我得到的结果,尽管在创建新对象时每个属性都被赋值:

There are 4 Account objects
acct.name is 
acct.highWaterBalance is nil
acct.isCurrent is false
acct.name is 
acct.highWaterBalance is nil
acct.isCurrent is false
acct.name is 
acct.highWaterBalance is nil
acct.isCurrent is false
acct.name is 
acct.highWaterBalance is nil
acct.isCurrent is false

按预期打印的唯一属性是 acct.isCurrent .name (声明为 dynamic var name = "" )或者为什么 .highWaterBalance dynamic var highWaterBalance: Float? )正在打印为 nil

我是斯威夫特的新手,但在问之前我已经研究了很多。如果你能指点我做错了什么,我一定会很感激的。

-----------------

编辑1:

导入基础 导入RealmSwift

@objcMembers类帐户:对象{

dynamic var name = ""
dynamic var currentBalance: Float?
dynamic var highWaterBalance: Float?
dynamic var isCurrent: Bool = false

扩展帐户{

// Adds an item in realm, a new transaction object

@discardableResult
static func add(thisAccount: Account, in realm: Realm = try! Realm())
    -> Account {
        let account = Account()
        try! realm.write {
            realm.add(account)
        }
        return account
}

-----------------

编辑2:

我的代码,我从 Account 类定义。现在我使用以下两个函数, testForActiveAccount 和 addAccountButton . 第一次检查是否已经有 对象已保存,而第二个对象旨在创建并保存新的 帐户

现在, 似乎工作正常——如果没有帐户,它会创建并命名一个帐户并将其持久化到磁盘。然后,它以具有适当属性的命名帐户的形式打印出证据。

然而, --它使用基本相同的代码——似乎创建了一个空的 帐户 对象,具有零或空属性。

下面是用于比较的整个函数:

func testForActiveAccount(){

    let realm = try! Realm()
    let accounts = realm.objects(Account.self)
    let primaryAccount = Account()

    if accounts.count < 1 {
        primaryAccount.name = "Primary Account"
        primaryAccount.isCurrent = true
        primaryAccount.highWaterBalance = 0.00

        try! realm.write {
            realm.add(primaryAccount)
        }
        self.activeAcctLabel.text = primaryAccount.name
        self.currentAccount = primaryAccount

        for acct in accounts{

            print ("In testForActiveAccount func:\n")
            print("There are \(String(describing: accounts.count)) Account objects \n")

            print("acct.name is \(acct.name)")
            print("acct.highWaterBalance is \(String(describing: acct.highWaterBalance))")
            print("acct.isCurrent is \(String(describing: acct.isCurrent))")

        }
    }
}


@IBAction func addAccountButton(_ sender: Any) {

    // Pop alert to add new account

    let addAcctAlert = UIAlertController(title: "Create New Account", message: "Please name your new account", preferredStyle: UIAlertControllerStyle.alert)

    addAcctAlert.addTextField{ (accountTextField) in
        accountTextField.placeholder = "Enter new account name"
        accountTextField.keyboardType = .`default`
    }

    addAcctAlert.addAction(UIAlertAction(title: "Continue", style: UIAlertActionStyle.destructive, handler: { action in

        // Create new Account with name, balance, isCurrent, save to disk

        let realm = try! Realm()
        let newAccount = Account()
        newAccount.name = self.accountTextField.text!
        newAccount.isCurrent = false
        newAccount.highWaterBalance = 0.0

        try! realm.write {
            realm.add(newAccount)
        }

        let currentAccounts = realm.objects(Account.self)

        print ("In AddAccountButton func:")
        print("There are \(String(describing: currentAccounts.count)) Account objects \n")

        for acct in currentAccounts{
            print("acct.name is \(acct.name)")
            print("acct.highWaterBalance is \(String(describing: acct.highWaterBalance))")
                print("acct.isCurrent is \(String(describing: acct.isCurrent))\n")

        }

    }))

    addAcctAlert.addAction(UIAlertAction(title: "Cancel", style: UIAlertActionStyle.cancel, handler: nil))

    self.present(addAcctAlert, animated: true, completion: nil)

}

In testForActiveAccount func:

There are 1 Account objects 

acct.name is Primary Account
acct.highWaterBalance is nil
acct.isCurrent is true

In AddAccountButton func:
There are 2 Account objects 

acct.name is Primary Account
acct.highWaterBalance is nil
acct.isCurrent is true

acct.name is 
acct.highWaterBalance is nil
acct.isCurrent is false

我知道我一定是在做一些简单而愚蠢的事情——我只是不知道是什么。有什么想法吗?