add the values according to appending the values - ios

Question

How to add the values according to appending the values in swift3.
this is my datasource:-
class QM_ChartDataSourceModel: NSObject {
var dataListArray:Array<QM_CartModel>? = []
init(array :Array<[String:Any]>?) {
super.init()
var newArray:Array<[String:Any]> = []
if array == nil{
newArray = self.getJsonDataStored22()
}
else{
newArray = array!
}
var datalist:Array<QM_CartModel> = []
for dict in newArray{
let model = QM_CartModel(dictionary: dict)
datalist.append(model!)
}
self.dataListArray = datalist
}
}
typealias dummyDataSource22 = QM_ChartDataSourceModel
extension dummyDataSource22{
func getJsonDataStored22() ->Array<Dictionary<String,String>>{
let jsonArray = [["id":"311","name":"Dosa Fest","price":"QR 40","quantity":"3"],["id":"312","name":"Organic Vegan Fest","price":"QR 40","quantity":"2"],["id":"313","name":"Food Of Life Time","price":"QR 56","quantity":"7"],["id":"314","name":"Tea Time","price":"QR 88","quantity":"1"],["id":"315","name":"Dosa Fest","price":"QR 13","quantity":"6"],["id":"316","name":"Organic Vegan Fest","price":"QR 4","quantity":"8"],["id":"317","name":"Food Of Life Time","price":"QR 90","quantity":"3"],["id":"318","name":"Tea Time","price":"QR 66","quantity":"2"],["id":"319","name":"Dosa Fest","price":"QR 81","quantity":"6"],["id":"320","name":"Organic Vegan Fest","price":"QR 49","quantity":"2"]] as Array<Dictionary<String,String>>
return jsonArray
}
}
in tableviewcell:
func setEventData(carts:QM_CartModel)
{
self.name.text = carts.cartname
self.price.text = carts.cartsum
self.itemQuantityStepper.value = 1
setItemQuantity(quantity)
print(self.price.text)
let value = carts.cartsum
let x: Int? = Int(value!)
print(x)
let add = x!
print(add)
let theIntegerValue1 :Int = add
let theStringValue1 :String = String(theIntegerValue1)
self.price.text = theStringValue1
}
my model:-
class QM_CartModel: NSObject {
var cartname :String!
var cartprice:String!
var cartquantity:String!
var carttotalprice:String!
var carttotal:String!
var cartQR:String!
var cartvalue:String!
var cartsum:String?
var cartid:String!
init?(dictionary :JSONDictionary) {
guard let name = dictionary["name"] as? String else {
return
}
if let quantity = dictionary["quantity"] as? String{
let price = dictionary["price"] as? String
let id = dictionary["id"] as? String
self.cartid = id
self.cartprice = price
self.cartquantity = quantity
let fullNameArr = price?.components(separatedBy: " ")
let QR = fullNameArr?[0]
let value = fullNameArr?[1]
self.cartQR = QR
self.cartvalue = value
let x: Int? = Int(value!)
print(x)
let y:Int? = Int(quantity)
print(y)
let sum = x! * y!
print(sum)
let sum1 = String(describing: sum)
cartsum = sum1
}
my viewmodel:-
class QM_ChartViewModel: NSObject {
var datasourceModel:QM_ChartDataSourceModel
var insertedArray:QM_CartModel?
var filteredListArray:Array<QM_CartModel>? = []
var totalListArray:Array<QM_CartModel>? = []
init(withdatasource newDatasourceModel: QM_ChartDataSourceModel) {
datasourceModel = newDatasourceModel
print(datasourceModel.dataListArray)
}
func datafordisplay(atindex indexPath: IndexPath) -> QM_CartModel{
return datasourceModel.dataListArray![indexPath.row]
}
func numberOfRowsInSection(section:Int) -> Int {
return datasourceModel.dataListArray!.count
}
func delete(atIndex indexPath: IndexPath) {
datasourceModel.dataListArray!.remove(at: indexPath.row)
}
func search(idsearch :String?) {
filteredListArray = datasourceModel.dataListArray?.filter{($0.cartid?.range(of: idsearch!, options: .caseInsensitive) != nil)}
print(filteredListArray)
}
func searchindex(objectatindex index: Int) -> QM_CartModel {
return self.filteredListArray![index]
}
func total()
{ totalListArray = datasourceModel.dataListArray?.filter{($0.cartsum != nil)}
print(totalListArray)
}
func add(){
datasourceModel.dataListArray?.append(insertedArray!)
print(datasourceModel.dataListArray)
print(insertedArray?.offerAddName)
print(insertedArray?.offerprice)
self.datasourceModel.dataListArray = datasourceModel.dataListArray
print(insertedArray?.cartsum)
}
func addquantity(quantity:Int)
{
// datasourceModel.dataListArray?.filter{ $0.cartid! == cartaddedid! }.first?.qty = quantity as NSNumber?
}
}
in viewcontroller my code as below:
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return chartViewModel.numberOfRowsInSection(section: section)
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let identifier = "cell"
var cell: QM_ChartCell! = tableView.dequeueReusableCell(withIdentifier: identifier) as? QM_ChartCell
if cell == nil {
tableView.register(UINib(nibName: "QM_ChartCell", bundle: nil), forCellReuseIdentifier: identifier)
cell = tableView.dequeueReusableCell(withIdentifier: identifier) as? QM_ChartCell
}
cell.setEventData(carts: chartViewModel.datafordisplay(atindex: indexPath))
print(cell.numbers)
see here can see the total.So that way i need to display the total
this is my code ...here i getting the values model.cartsum.So this value is appending in var number:[String] = []
.But here i need-as values are appending ,here i need to add the number.So first value is 1 and second value is 2 then i need to add this values.And if next number is 3 then i need to get sum = 6.
How to get

Answer 1

You need to calculate all the cart stuff just after you get it either from service or from local. You don't need to do calculation in cellForRowAtIndex: method because it should be done once.
I assume this is your data structure as mentioned in question.
let jsonArray = [["id":"311","name":"Dosa Fest","price":"QR 40","quantity":"3"],
["id":"312","name":"Organic Vegan Fest","price":"QR 40","quantity":"2"],
["id":"313","name":"Food Of Life Time","price":"QR 56","quantity":"7"],
["id":"314","name":"Tea Time","price":"QR 88","quantity":"1"],
["id":"315","name":"Dosa Fest","price":"QR 13","quantity":"6"],
["id":"316","name":"Organic Vegan Fest","price":"QR 4","quantity":"8"],
["id":"317","name":"Food Of Life Time","price":"QR 90","quantity":"3"],
["id":"318","name":"Tea Time","price":"QR 66","quantity":"2"],
["id":"319","name":"Dosa Fest","price":"QR 81","quantity":"6"],
["id":"320","name":"Organic Vegan Fest","price":"QR 49","quantity":"2"]]
Here is how to calculate the total of the cart. As per your data considering price is in Int
var total = 0
for item in jsonArray {
/// Will check if quantity is available in dictionary and convertible into an Int else will be 0
let quantity = Int(item["quantity"] ?? "0") ?? 0
/// Will check price key exists in the dictionary
if let priceStr = item["price"] {
/// Will fetch the last components and check if it is convertible into an Int else 0
let price = Int(priceStr.components(separatedBy: " ").last ?? "0") ?? 0
/// Multiply price with quantity and add into total
total += price * quantity
}
}
print(total)
Output: 1776
Another way:
let total = jsonArray.map { (item) -> Int in
let quantity = Int(item["quantity"] ?? "0") ?? 0
let price = Int(item["price"]?.components(separatedBy: " ").last ?? "0") ?? 0
return quantity * price
}.reduce(0, +)
print(total)

Answer 2

Please try this code if you have array of Int
var arrayOfInt = [2,3,4,5,4,7,2]
let reducedNumberSum = arrayOfInt.reduce(0,+)
print(reducedNumberSum)
Answer: 27
In your code
let model = chartViewModel.datafordisplay(atindex: indexPath)
Please describe more so we can answer according your problem.