how to filter json object in swift?

Question

How can I filter these json object? I mean I want print only patients whose id is equal to 3.

var patients: Array<AnyObject>? if let obj: AnyObject = manager?.responseObject as AnyObject? {
            if let pats = obj["patients"] as! Array<AnyObject>? {
                patients = pats
            }
        }

This is my printed variable

{
    patients =     (
                {
            city = "\U0411\U0430\U044f\U043d\U0445\U043e\U043d\U0433\U043e\U0440";
            district = "\U0411\U0430\U044f\U043d\U0445\U043e\U043d\U0433\U043e\U0440";
            firstname = fdfsdf;
            lastname = dsfgsdfg;
            "patient_id" = 1064;
            "patient_status" = 3;
            "register_id" = "\U0430\U043083040411";
        }
                {
            city = "\U0411\U0430\U044f\U043d\U0445\U043e\U043d\U0433\U043e\U0440";
            district = "\U0411\U0430\U044f\U043d\U0445\U043e\U043d\U0433\U043e\U0440";
            firstname = dwfw;
            lastname = dsfsdf;
            "patient_id" = 1056;
            "patient_status" = 1;
            "register_id" = "\U0443\U044399111134";
        }
}

if let pats = obj["patients"] as [String:Any]{patients = pats.filter{$0.patient_id ==3}} or something like that? — Larme
– Larme, Commented Oct 28, 2016 at 9:56

vadian · Accepted Answer · 2016-10-28 09:57:02Z

2

Please cast the types down as much as possible.

All types are more specific than AnyObject, JSON dictionaries are always [String:AnyObject] and JSON arrays are Array<[String:AnyObject]>. Use Array<AnyObject> only if the array contains another array or is more nested.

Filter the patients with the filter function.

var patients = Array<[String:AnyObject]>()

if let obj = manager?.responseObject as? [String:AnyObject] {
   if let pats = obj["patients"] as? Array<[String:AnyObject]> {
       patients = pats.filter { $0["patient_status"] as! Int == 3 } 
   }
}

Note: In Swift 3 AnyObject has been replaced with Any.

answered Oct 28, 2016 at 9:57

vadian

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