To store different struct in a array and update the array when struct value changed in swift

Question

I want to save different struct in a array. And i want to update the array when any of the struct value changed.

My structs are -


struct A{
    var name: String
    var village: String
}
struct B{
    var name: String
    var village: String
}
struct C{
    var name: String
    var village: String
}
struct D{
    var name: String
    var village: String
}
struct E{
    var name: String
    var village: String
}

class ViewController: UIViewController {

    var dataArray = [A.self, B.self, C.self, D.self, E.self] as [Any]
    
    override func viewDidLoad() {
        super.viewDidLoad()
  
    }

    private func changeStructValue(){
        
        //update struct D Value
        if let nameOne = textFieldOne.text{
        let a = A(name: nameOne, village: “abcd”)
        dataArray[0] = a
        }
        
        //update struct D Value
        if let nameFour = textfieldFour.text{
            let d = D(name: nameFour, village: “efgh”)
            dataArray[3] = d
        }
    }

Can I do like this? Or I am doing in wrong way?

And also I want to delete the struct which is nil from the array -

 private func submitButton(){
     
     //Remove empty struct
     dataArray = dataArray.filter { $0 != nil }
 }
}

can I try like this?

Why do you have 5 structurally identical struct definitions? — Alexander
– Alexander, Commented Sep 30, 2020 at 18:53
i have 5 textfields present in 5 different cells of a tableview. When I am entering the value in the textfield, I want to update the struct . So I have taken 5 different struct . — Ios Developer
– Ios Developer, Commented Sep 30, 2020 at 19:01
@TapanRaut why not use one struct and different instances of the same struct? — gcharita
– gcharita, Commented Sep 30, 2020 at 19:03
@gcharita thanks for your response. Actually i am unable to do this by using the same struct. can yo suggest how to do this, so that the array will be updated according to the textfield present in tableview. — Ios Developer
– Ios Developer, Commented Sep 30, 2020 at 19:08
@TapanRaut your TableView has static or dynamic cells? Will be helpful if you add more of your code in the question. — gcharita
– gcharita, Commented Sep 30, 2020 at 19:16

Claudio · Accepted Answer · 2020-09-30 18:54:22Z

3

I think you can simplify your code by using a protocol with the shared properties and methods:

protocol MyProtocol {
    var name: String { get set }
    var village: String { get set }
}

struct A: MyProtocol {
    var name: String
    var village: String
}
struct B: MyProtocol {
    var name: String
    var village: String
}
struct C: MyProtocol{
    var name: String
    var village: String
}
struct D: MyProtocol{
    var name: String
    var village: String
}
struct E: MyProtocol{
    var name: String
    var village: String
}

Then on the view controller:

var dataArray: [MyProtocol] = []

answered Sep 30, 2020 at 18:54

Claudio

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1 Comment

Alexander Over a year ago

There's an underlying issue, which this fixes but doesn't remove: why are there 5 structurally identical structs in the first place?

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