CODEWITHSUNDEEP
swift
swiftPunk
swiftPunk

Reputation: 1

How can I be able to access the label and value of a constant/variable in Swift?

I am using Mirror to access the children of my struct like this:

struct TestType {

    var firstName: String
    var lastName: String
    
    var value: String {
        return firstName + lastName
    }
}

use case:

let person: TestType = TestType(firstName: "Tim", lastName: "Cook")


for property in Mirror(reflecting: person).children  {
    print("label: \(property.label!)", "value: \(property.value)")
}

results:

label: firstName value: Tim

label: lastName value: Cook

Now my goal is do the same thing for the person constant as well, with that said, I want be able to access the label of person which is person and the value of it, the result should look like this:

label: person value: Tim Cook

How can i do this in Swift?

Upvotes: 0

Views: 111

Answers (1)

matsotaa
matsotaa

Reputation: 123

Honestly I have no idea why need to use Mirror here) would be great if you would describe it in as a comment below this answer. I would appreciate it)

but the reason why you can't what you need is because of Mirror can't see computed properties, as far as I know. Any way you can customise your init method to reach what you need. But remember that using Mirror is too expensive, for example: if it in inherited object it will parse every single thing in parent classes which could be accessible for Mirror

struct TestType {
    let firstName: String
    let lastName: String
    let person: String

    init(firstName: String, lastName: String) {
        self.firstName = firstName
        self.lastName = lastName
        person = [firstName, lastName].joined(separator: " ")
    }
}

Upvotes: 0

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