Using UISearchbar with JSON to filter the result - swift

Question

I am fetching the data from JSON using http in the following code:
I have an ObjectModel, DownloadModelProtocol, and TableViewController
(Modal.swift)
class OrderItemModal: NSObject {
var deptname: String!
var staffname: String!
var status: String!
var userid: String!
}
(DownloadOrderModal.swift):
protocol OrderDownloadProtocol: class {
func itemsDownload(items: Array<Any>)
}
...
let bmsOrders = NSMutableArray()
...
weak var delegate: OrderDownloadProtocol!
let urlPath = "http://localhost/production/api/db_orders.php"
func downloadItems() {
let url = URL(string: urlPath)!
let defaultSession = Foundation.URLSession(configuration: URLSessionConfiguration.default)
...
for i in 0..<jsonResult.count
{
jsonElement = jsonResult[i] as! NSDictionary
let bmsOrder = OrderItemModal()
....
bmsOrders.add(bmsOrder)
....
declaration:
var orderItems = [OrderItemModal]()
var filterArray= [OrderItemModal]()
func itemsDownload(items: Array<Any>) {
orderItems = items as! [OrderItemModal]
}
and viewDidLoad:
let bmsOrder = DownloadOrderModal()
bmsOrder.delegate = self
bmsOrder.downloadItems()
this is the JSON result:
(
{
"deptname" = "Production";
"staffname" = Warehouse;
"status" = 1;
"userid" = ware;
})
This the the search bar code
filterArray = orderItems.filter( { ($0. staffname) (of: searchText, options: .caseInsensitive) })
And finally, this is the error:
Cannot assign value of type '[OrderItemModal]' to type '[String]'
Ultimately, I will populate the data into a table.

Answer 1

You have a few issues. It seems that orderItems is an NSArray array of OrderItemModal values. The first thing you need to do is to stop using NSArray and use a Swift array of the proper type. In this case it should be [OrderItemModal]. You will need to ensure filterArray is also declared as [OrderItemModal].
The result of a filter on such an array will be an array of OrderItemModal but you are attempting to force cast the result as an array of String.
You are also force-casting the closure to be (Any) -> Bool. There's no need for that.
And lastly, you are needlessly using NSString. Stick with String.
All you need is:
filterArray = orderItems.filter { (item) -> Bool in
return item.staffname.range(of: searchText, options: .caseInsensitive) != nil
}
Even simpler:
filterArray = orderItems.filter { $0.staffname.range(of: searchText, options: .caseInsensitive) != nil }