Reflection Swift 2反射误差

我已经查看了一段swift代码，尝试创建一个将对象序列化为JSON的反射函数。问题是，当我调用初始值设定项获取反射时，它会抛出一个疯狂的错误

struct Address {
    var street: String
}

struct Person {
    var name: String = "Dre"
    var age: Int = 33
    var dutch: Bool = false
    var address: Address? = Address(street: "Clark Drive")
}

// Throws an error on the next line
let mirror = Mirror(reflecting: Person) 

当我尝试将mirror的值设置为镜像初始化的结果时，会出现以下错误：

调用中缺少参数标签“reflecting:”

无法使用元素标签创建单个元素元组

---

你知道这里会出什么问题吗？

你需要传递一个

Person

的实例，而不是类

Person

。例如：

struct Address {
    var street: String
}

struct Person {
    var name: String = "Dre"
    var age: Int = 33
    var dutch: Bool = false
    var address: Address? = Address(street: "Clark Drive")
}

let person = Person()
let mirror = Mirror(reflecting: person)

print(mirror.displayStyle)
for case let (label?, value) in mirror.children {
    print(label, value)
}

印刷品：

Optional(Struct)
name Dre
age 33
dutch false
address Optional(Address(street: "Clark Drive"))
Mirror for Bookmark

---

您需要传递

Person

的实例，而不是类

Person

。例如：

struct Address {
    var street: String
}

struct Person {
    var name: String = "Dre"
    var age: Int = 33
    var dutch: Bool = false
    var address: Address? = Address(street: "Clark Drive")
}

let person = Person()
let mirror = Mirror(reflecting: person)

print(mirror.displayStyle)
for case let (label?, value) in mirror.children {
    print(label, value)
}

印刷品：

Optional(Struct)
name Dre
age 33
dutch false
address Optional(Address(street: "Clark Drive"))
Mirror for Bookmark

错：

正确：

func jediGreet(name: String, ability: String) -> (farewell: String, mayTheForceBeWithYou: String) {
  return ("Good bye, \(name).", " May the \(ability) be with you.")
}

let retValue = jediGreet (name:"old friend",ability: "Force")
print(retValue)
print(retValue.farewell)
print(retValue.mayTheForceBeWithYou)

错：

正确：

func jediGreet(name: String, ability: String) -> (farewell: String, mayTheForceBeWithYou: String) {
  return ("Good bye, \(name).", " May the \(ability) be with you.")
}

let retValue = jediGreet (name:"old friend",ability: "Force")
print(retValue)
print(retValue.farewell)
print(retValue.mayTheForceBeWithYou)

---

我为您更正了格式。现在由你来描述你改变了什么，以及为什么我要为你修改格式。现在由你来描述你改变了什么以及为什么