Filter Data in SwiftyJson - ios

Question

I have one SwiftyJson object.
I can not filter that array. I have tried this solution https://stackoverflow.com/a/37497170/4831567. But my json format is different that's why not working.
[
{
"name": "19860",
"header": {
"start_time": "1519270200",
"end_time": "1519299000",
"state": "lunch"
},
"alerts": "1",
"venue": {
"location": "Delhi, India",
"timezone": "+05:30"
},
"srs_category": [
0,
1
]
},
{
"name": "19861",
"header": {
"start_time": "1519270200",
"end_time": "1519299000",
"state": "Dinner"
},
"alerts": "1",
"venue": {
"location": "Mumbai, India",
"timezone": "+05:30"
},
"srs_category": [
1,
3
]
},
{
"name": "19862",
"header": {
"start_time": "1519270200",
"end_time": "1519299000",
"state": "lunch"
},
"alerts": "1",
"venue": {
"location": "Surat, India",
"timezone": "+05:30"
},
"srs_category": [
0,
2
]
}
]
i want to find that object that srs_category contain 1. I know it is possible by looping and condition. But i want via NSPredicate. If it is possible then please help me.
Thank You.

Answer 1

Here is easy way to use SwiftyJSON:
let filtered = JSON(yourArray).arrayValue.filter({
$0["srs_category"].arrayValue.map({ $0.intValue }).contains(1)
})

Answer 2

Use a Swift native function rather than NSPredicate
data represents the Data object received from somewhere
do {
if let json = try JSONSerialization.jsonObject(with:data) as? [[String:Any]] {
let srsCategory1 = json.first(where: { dict -> Bool in
guard let array = dict["srs_category"] as? [Int] else { return false }
return array.contains(1)
})
print(srsCategory1 ?? "not found")
}
} catch {
print(error)
}
If there are multiple items which can match the condition replace first with filter. Then the result is a non-optional array.