Question 68028 in IOS Swift Question posted in
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Use array as string and remove double quotes symbol to change array content type from string to any, as whole array will be string its type can be any – Ios swift

I been stuck at this for far too long. I have to send this array as string: "[{"packageId":"1"}, {"packageId":"1"}, {"packageId":"3"}]" and so on. The values here are being inserted and can be any integer.
As I cannot declare any variable in format like let pjson = {"packageId":"1"} so I decided to create a string instead in this way: let pjson = "{"packageId":"1"}" and using for loop im adding data in some array in following way:

for package in packages {
       if let pId = package.packageId {
            let pjson = "{"packageId":"(pId)"}"
             packageJson.append(pjson as Any)
        }
 }

After this im getting an array like this:

packageJson = ["{"packageId":"1"}", "{"packageId":"2"}", "{"packageId":"3"}", "{"packageId":"4"}", "{"packageId":"5"}", "{"packageId":"6"}"]

Now I want to convert my packageJson to this format:

packageJson = [{"packageId":"1"}, {"packageId":"2"}, {"packageId":"3"}, {"packageId":"4"}, {"packageId":"5"}, {"packageId":"6"}]

As you can see, I don’t want array content to be a string type.

So I stored whole array as string and decided to remove those " like this:

var stringJson = "(packageJson)"
stringJson = stringJson.replacingOccurrences(of: "\{", with: "{", options: NSString.CompareOptions.literal, range: nil)
stringJson = stringJson.replacingOccurrences(of: "}\", with: "}", options: NSString.CompareOptions.literal, range: nil)

I tried to ""{" but got error so using "\{" as I read somewhere it can be used for " however that answer wasn’t market correct so not sure.

How can I remove those " to convert array into my required format? Or is there any better way to declare let pjson = "{"packageId":"(pId)"}" so I can simply add that without having to use string format? Swift doesn’t allow to start a variable with "{" tho.

Anyway I would just like to get final result in this way:

stringJson = "[{"packageId":"1"}, {"packageId":"2"}, {"packageId":"3"}, {"packageId":"4"}, {"packageId":"5"}, {"packageId":"6"}]"
Tags:

2

Answers


  1. 0

    Your final result is a JSON string of an array of custom objects. There is a way more simpler way to achieve what you want.

    First create a struct to hold your values:

    struct PackageContainer: Codable{
    var packageId: String
}

    Then create you data as you deem fit. Example:

    let packages = (0...10).map{ PackageContainer(packageId: "($0)") }

    Then encode them with JSONEncoder:

    let json = try JSONEncoder().encode(packages)

    This will give you a Data object. You can treat it as string if you like or send it in the body of a datarequest.

    Example:

    print(String(data: json, encoding: .utf8)!)

    will produce:

    [{"packageId":"0"},{"packageId":"1"},{"packageId":"2"},{"packageId":"3"},{"packageId":"4"},{"packageId":"5"},{"packageId":"6"},{"packageId":"7"},{"packageId":"8"},{"packageId":"9"},{"packageId":"10"}]

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  2. 0

    In Swift 5.0+

    let ids = [1, 2]

let idsString = ids.map { id -> String in
    return "{"packageId"" + ":" + ""(id)"}"
}.joined(separator: ",")

let result = "[" + idsString + "]"
print(result)

    you will get the results:

    [{"packageId":"1"},{"packageId":"2"}]

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