CODEWITHSUNDEEP
swiftdictionarynsuserdefaults
Krunal Nagvadia
Krunal Nagvadia

Reputation: 1162

Swift: Remove only the first object from the NSUserDefaults

I create the Bus Ticket Booking App. so I have Dictionary with the Array in it. In which the recent Route search result is save into the NSUserDefaults. Now I want to print that result into the one TableView.

Now in that TableView I only want to show the last 10 That's all I can do perfectly but the problem is every time the result is save in to the UserDefaults so the size of the UserDefaults is increase so I just want to remove the Defaults So every time my array element remove Repeat While loop is call the number of the element in the UserDefaults (If I i have 30 element into it it run 20 times so like). This is what i'm doing for Dictionary. 

    var arrSearch = [[String:Any]]()
    var searchBusVC:SearchBusViewController?

    override func viewDidLoad() {
            super.viewDidLoad()

            if let arr = UserDefault["Search"] {
                arrSearch.append(contentsOf: (arr as! [[String:Any]]))
                repeat{
                 arrSearch.removeFirst()

                }while (arrSearch.count > 10)

                arrSearch.reverse()
            }
                self.tblSearch.reloadData()
        }

So I want to remove the same from the UserDefaults Is it possible? This is my Table View Image.

enter image description here

Upvotes: 0

Views: 194

Answers (1)

Kathiresan Murugan
Kathiresan Murugan

Reputation: 2962

If you are saving [[String: Any]] in UserDefaults means its like a normal way to remove objects from array. Once you done removing objects from array then save it to UserDefaults.

 var recentRecords:[[String: Any]]? {
      get {
        return UserDefaults.standard.array(forKey:"recentRecord")
       }
      set {
        var trimmed: [[String: Any]] = newValue
        // Trim last 10 objects from array
        if newValue.count >= 10 { 
         trimmed = newValue.suffix(10)
        } 

        UserDefaults.standard.set(trimmed, forKey: "recentRecord")
      }
 }

Upvotes: 0

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