swift json parsing based on parameter - json

Question

I am having the following web service response in which I need parse the parameters based on "MainServiceCategories_ID"
Here is the response
{
"Entity": {
"ID": 20021,
"UserTypeID": 1,
"UserType": null,
"UserID": 30046,
"Code": "lPx1lTEq",
"Name": "بدراء",
"EnglishName": "Badra",
"IconProfileImageID": "",
"MainImageProfileImageID": "EED372C3-5C4F-E711-8100-0CC47A343427",
"LocationLng": 78.37021,
"LocationLat": 17.432563,
"Services": [
{
"ID": 11788,
"MainServiceCategories_ID": 3,
"ServiceCategories_ID": 6,
"Children": [
{
"Parent_ID": 6,
"Name": “John”,
"EnglishName": “Johnny”,
},
{
"Parent_ID": 6,
"Name": “Ronny”,
"EnglishName": “Ronny”,
}]
},
{
"ID": 11788,
"MainServiceCategories_ID": 2,
"ServiceCategories_ID": 6,
"Children": [
{
"Parent_ID": 6,
"Name": “Samuel”,
"EnglishName": “Samuel”,
},
{
"Parent_ID": 6,
"Name": “Badri”,
"EnglishName": “Badri”,
}]
},
{
"ID": 11788,
"MainServiceCategories_ID": 3,
"ServiceCategories_ID": 6,
"Children": [
{
"Parent_ID": 6,
"Name": “emma”,
"EnglishName": “Emma”,
},
{
"Parent_ID": 6,
"Name": “Sean”,
"EnglishName": “Sean”,
}]
}]
this is the code I am writing to do it
do{
let entityDic = responseDictionary["Entity"] as? [String: Any]
let servicesDic = entityDic?["Services"] as? [Any]
for i in 0 ..< servicesDic!.count {
let services = servicesDic?[i] as? [String: Any]
let availableServices = services!["EnglishName"]
servicesNamesArr.append(availableServices! as! String)
let children = services!["Children"]
childrenServices.append(children!)
let MainServiceCategories_ID = services!["MainServiceCategories_ID"]
MainServiceCategoriesID.append(MainServiceCategories_ID!)
}
print("childrenServices \(childrenServices)")
}
catch let error{
print(error)
}
I am able to get upto children dictionaries. Now the thing is I am trying to parse "English name" under children section and separate them based on "MainServiceCategories_ID" where I am getting fatal error in unwrapping the value.
for example if MainServiceCategories_ID =1 then that "English Name" need to be store in an array and if MainServiceCategories_ID =2 then into another array

Answer 1

The problem is, you are trying to parse "EnglishName" as a key of an element of the "Services" array and not as a key of a "Children" element. "Services" does not have a key "EnglishName", so you can't store that in servicesNamesArr. servicesDic should also be an Array of Dictionaries and not an array of Any objects.
See below code using guard statements using safe optional unwrapping:
do{
guard let entityDic = responseDictionary["Entity"] as? [String: Any] else {return}
guard let servicesDic = entityDic?["Services"] as? [[String:Any]] else {return}
for service in services {
guard let MainServiceCategoryID = service["MainServiceCategories_ID"] as? Int else {return}
MainServiceCategoriesID.append(MainServiceCategoryID)
guard let children = service["Children"] as? [[String:Any]] else {return}
childrenServices.append(children)
if MainServiceCategoryID == 3 {
for child in children {
if let availableService = child["EnglishName"] as? String {
servicesNamesArr.append(availableService)
}
}
}
}
print("childrenServices \(childrenServices)")
} catch let error{
print(error)
}