CODEWITHSUNDEEP
iosjsonswift3
Heki
Heki

Reputation: 396

How to determine between a string and an integer received from JSON in Swift 3

I receive a result from JSONrequest where one attribute is normally a string but unfortunately sometimes is 0 (not a string). In order to process the JSON result I would like to check on whether it is a 0 or a string to avoid a crash

part of the JSON result:

"9919ee1e-ffbc-480b-bc4b-77fb047e9e68" =         {
        icon = home;
        id = "9919ee1e-ffbc-480b-bc4b-77fb047e9e68";
        index = 1;
        name = Thuis;
        parent = 0;
    };
    "9eb2975d-49ea-4033-8db0-105a3e982117" =         {
        icon = books;
        id = "9eb2975d-49ea-4033-8db0-105a3e982117";
        index = 6;
        name = Studeerkamer;
        parent = "9919ee1e-ffbc-480b-bc4b-77fb047e9e68";
    };
    "a4a23044-edce-4b81-be7f-a2123e14d8c0" =         {
        icon = kitchen;
        id = "a4a23044-edce-4b81-be7f-a2123e14d8c0";
        index = 1;
        name = Keuken;
        parent = "855113f1-f488-4223-b675-2f01270f573e";
    };

Notice the parent attribute, which is the attribute I am referring to. If somebody can help to point me in the right direction I would be very greatful, I am a beginner in Swift and Xcode

Upvotes: 3

Views: 1479

Answers (2)

Ankit Thakur
Ankit Thakur

Reputation: 4749

check with as? keyword.

let index = record.value(forKey:"index") as? Int ?? -1
let id = record.value(forKey:"id") as? Int ?? "dummy value"

Upvotes: 0

Surjeet Singh
Surjeet Singh

Reputation: 11939

While Parsing this JSON you can implemented a check like this to avoid crash and to parse data from JSON is

var parent:String?

if let parentId = dict.value(forKey:"parent") as? Int {
    parent = "\(parentId)"
} else if let parentId = dict.value(forKey:"parent") as? String {
   parent =  parentId
}

With this parent variable will have string value while it will be a 0(Int) or a key(String) received from JOSN.

Upvotes: 3

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