Changing a zero-prefixed string into JSON format using Swift 4

Question

Changing a zero-prefixed string into JSON format using Swift 4

When attempting to encode an integer that starts with a 0 into JSON using swift 4, I encountered an issue.

Even though I am utilizing a standard JSONSerialization library, I am facing difficulties in serializing the data after converting the string to utf8.

let code = "012345" // sample code
let body = "{\"code\": " + code + "}"
let stringData = body.data(using: .utf8)!
let jsonArray = try? JSONSerialization.jsonObject(with: stringData, options : .allowFragments) [returns nil]
let data: Data? = try? JSONSerialization.data(withJSONObject: jsonArray as Any, options: .prettyPrinted)

The problem arises on the second to last line (starting with let jsonArray), where it returns nil. Interestingly, changing the code to "112345" eliminates this error. Any assistance would be greatly appreciated. Thank you!

json swift serialization

Answer 1

Answer №1

Instead of manually constructing a string, consider utilizing Dictionary along with JSONSerialization to generate the data as shown below:

let code = "987654"
let jsonData: [String: Any] = ["code": code]
do {
    let serializedData = try JSONSerialization.data(withJSONObject: jsonData, options: .fragmentsAllowed)
    print(String(data: serializedData, encoding: .ascii)!)
} catch {
    print(error)
}

Result

{"code":"987654"}

Answer 2

Instead of manually constructing a string, consider utilizing Dictionary along with JSONSerialization to generate the data as shown below:

let code = "987654"
let jsonData: [String: Any] = ["code": code]
do {
    let serializedData = try JSONSerialization.data(withJSONObject: jsonData, options: .fragmentsAllowed)
    print(String(data: serializedData, encoding: .ascii)!)
} catch {
    print(error)
}

Result

{"code":"987654"}

Changing a zero-prefixed string into JSON format using Swift 4

Answer №1

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