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Extract a value from JSON string

I’m trying to extract the value of tax_amount from JSON string but this line

let taxAmountS = json["tax_amount"] as? String

triggers an error. A print out of json (json string) looks like it should work, here it is

["client_secret": pi_3Q5hYZHbqLi, "tax_amount": 192, "total": 2424]

It contains "tax_amount": 192. Can anyone assist with how to extract the value of 192 from the json string?

let task = URLSession.shared.dataTask(with: request, completionHandler: { [weak self] (data, response, error) in
            guard let data = data,
                let json = try? JSONSerialization.jsonObject(with: data, options: []) as? [String : Any],
                //let taxAmountS = json["tax_amount"] as? String,
                let self = self else {
                    print("Error")
                return
            }
            
            print("json is ", json)
            
            taxAmt = (taxAmountS as NSString).doubleValue
Tags:

2

Answers


  1. 0

    I believe the value of the key tax_amount is a Number rather than a String. It should be:

    let mock: [String: Any] = ["client_secret": "pi_3Q5hYZHbqLi", "tax_amount": 192, "total": 2424]

if let taxAmount = mock["tax_amount"] as? Int {
    print(taxAmount)
    //192
}
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  2. 0

    please check your data types. The issue is because you are attempting to cast tax_amount as a String, but the value is actually a Number (specifically, an Int in your case).

    You can maybe properly extract the value

    1. Cast the Tax_amount to NSnumber, int, or maybe double

    anyways the issue is the datatype and how you cast it.

    probably..

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