Adding sections, separated by region_name, to UITableView in Swift - swift

Question

I have some JSON data that I am getting from my database. I can pull it fine and load it into my table view. my issue is separating my JSON data so I can section the tableview. I have JSON array like this
"data": [
{
"ID": 1,
"wilayah_id": 1,
"name": "Jembatan Lima",
"region_name": "region1"
},
{
"ID": 2,
"wilayah_id": 1,
"name": "Kebon Jeruk",
"region_name": "region1"
},
{
"ID": 18,
"wilayah_id": 3,
"name": "Waylunik",
"region_name": "region2"
},
{
"ID": 19,
"wilayah_id": 3,
"name": "Tenggiri",
"region_name": "region2"
},
{
"ID": 25,
"wilayah_id": 3,
"name": "Mesuji",
"region_name": "region3"
},
{
"ID": 26,
"wilayah_id": 4,
"name": "KM 6",
"region_name": "region3"
}
]
What I'm trying to do is separate this data into three parts sort by "region_name" in my table view.

Answer 1

//region model
struct RegionList {
var ID:String
var wilayah_id:String
var name:String
var region_name:String
static var dataSource:[RegionList] {
return [
RegionList.init(ID: "1", wilayah_id: "1", name: "3", region_name: "R1"),
RegionList.init(ID: "1", wilayah_id: "1", name: "3", region_name: "R2"),
RegionList.init(ID: "1", wilayah_id: "1", name: "3", region_name: "R1"),
RegionList.init(ID: "1", wilayah_id: "1", name: "3", region_name: "R2"),
RegionList.init(ID: "1", wilayah_id: "1", name: "3", region_name: "R3")
]
}
}
//Coming Json Array
var arrRegion:[RegionList] = []
//MAKe Section Array by Using Model Class
var regionInSectionArray:[[RegionList]] = []
//Using Dic key in String and value is Model
var usingDicKeySectionArray:[String:[RegionList]] = [:]
// Dummy Data
arrRegion = RegionList.dataSource
//Using Default Dictionary Method to make a group
usingDicKeySectionArray = Dictionary.init(grouping: arrRegion, by: { (region) -> String in
/// Here we are making group dictionary by using region name, you can set by own requirment
//Specify by Region
return region.region_name
})
// You can use it in number of section usingDicKeySectionArray.count
//And number of rowInSection usingDicKeySectionArray[section].count
print(usingDicKeySectionArray.map{$0.key})
//end
///Sorting Keys
//Second option
let sortedKeys = usingDicKeySectionArray.keys.sorted()
sortedKeys.forEach { (key) in
//
let region = usingDicKeySectionArray[key]
regionInSectionArray.append(region ?? [])
}
//USe
//regionInSectionArray.count // in numberOfSection
//regionInSectionArray[section].count // in numberOfRowInSection
//result = ["R1", "R2", "R3"]