如何在swift中列出类的所有变量

Is there a way to list all Variables of a class in Swift?

有没有办法在Swift中列出一个类的所有变量？

For example:

例如：

class foo {
   var a:Int? = 1
   var b:String? = "John"
}

I want to list it like this: [a:1, b:"John"]

我想这样列出：[a：1，b：“John”]

3 个解决方案

#1

The following should use reflection to generate the list of members and values. See fiddle at http://swiftstub.com/836291913/

以下内容应使用反射来生成成员和值列表。请参阅http://swiftstub.com/836291913/上的小提琴

class foo {
   var a:Int? = 1
   var b:String? = "John"
}
let obj = foo()
let reflected = reflect(obj)
var members = [String: String]()
for index in 0..<reflected.count {
    members[reflected[index].0] = reflected[index].1.summary
}
println(members)

Output:

输出：

[b: John, a: 1]

#2

How you can do it in Swift 3.0 recursively:

你如何在Swift 3.0中递归地做到这一点：

import Foundation

class FirstClass {
    var name = ""
    var last_name = ""
    var age = 0
    var other = "abc"

    func listPropertiesWithValues(reflect: Mirror? = nil) {
        let mirror = reflect ?? Mirror(reflecting: self)
        if mirror.superclassMirror != nil {
            self.listPropertiesWithValues(reflect: mirror.superclassMirror)
        }

        for (index, attr) in mirror.children.enumerated() {
            if let property_name = attr.label as String! {
                //You can represent the results however you want here!!!
                print("\(mirror.description) \(index): \(property_name) = \(attr.value)")
            }
        }
    }

}


class SecondClass: FirstClass {
    var yetAnother = "YetAnother"
}

var second = SecondClass()
second.name  = "Name"
second.last_name = "Last Name"
second.age = 20

second.listPropertiesWithValues()

results:

结果：

Mirror for FirstClass 0: name = Name
Mirror for FirstClass 1: last_name = Last Name
Mirror for FirstClass 2: age = 20
Mirror for FirstClass 3: other = abc
Mirror for SecondClass 0: yetAnother = YetAnother

#3

Maybe a bit late for the party, but this solution using reflection and Mirror is 100% working:

也许派对有点晚了，但这个使用反射和镜像的解决方案100％正常工作：

class YourClass : NSObject {
    var title:String
    var url:String

    ...something other...

    func properties() -> [[String: Any]] {
        let mirror = Mirror(reflecting: self)

        var retValue = [[String:Any]]()
        for (_, attr) in mirror.children.enumerated() {
            if let property_name = attr.label as String! {
                retValue.append([property_name:attr.value])
            }
        }
        return retValue
    }
}

and somewhere in your code...

在你的代码中的某个地方......

var example = MoreRow(json: ["title":"aTitle","url":"anURL"])
print(example.listPropertiesWithValues())

#1