实例成员不能在类型上使用

帕勃罗·埃斯科布拉

@IBAction func saveDetails(sender: AnyObject) {
        Person.firstName = firstNameTF.text
        Person.lastName = lastNameTF.text
}

上面是我正在尝试实现的功能，下面是我正在尝试创建其实例并将其文本字段中的数据存储在...中的类……我收到错误消息“实例成员“ firstName”不能用于类型人”。我几乎肯定我的班级设置正确并且初始化正确，所以我看不出问题可能出在哪里？

class Person {
    var firstName : String = ""
    var middleName : String? = nil
    var lastName : String = ""
    var yearOfBirth : Int? = nil
    var age : Int! {
        get {
            guard let _ = yearOfBirth else {
                return nil
            }
            return currentYear - yearOfBirth!
        }
        set {
            yearOfBirth = currentYear - newValue
        }
    }

    init(firstName: String, lastName: String, yearOfBirth: Int? = nil, middleName: String? = nil){
        self.firstName = firstName
        self.lastName = lastName
        self.yearOfBirth = yearOfBirth
        self.middleName = middleName
    }
    convenience init(firstName: String, lastName: String, age: Int, middleName: String? = nil) {
        self.init(firstName: firstName, lastName: lastName, yearOfBirth: nil, middleName: middleName)
        self.age = age
    }

}

瓦迪安

错误消息指出您不能调用类（类型）上的属性Person。

使用给定的初始化器创建Person 实例

@IBAction func saveDetails(sender: AnyObject) {
   let person = Person(firstName:firstNameTF.text, lastName:lastNameTF.text)
   // do something with person
}

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