CODEWITHSUNDEEP
arraysswift
Marco
Marco

Reputation: 1061

Swift - Filter array

I'm having a bit of trouble with filtering an array.

I have this code:

var names = [Name]()
var filteredNames = [Name]()

 func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
    if searchBar.text == nil || searchBar.text == ""{

        inSearchMode = false
        collectionView.reloadData()
        view.endEditing(true)
    } else {

        inSearchMode = true

        let lower = searchBar.text!.lowercased()
        print(lower)

        filteredNames = names.filter({$0.name.range(of: lower) != nil})
        collectionView.reloadData()
    }
}

The problem is that it seems not to see letters correctly. I've printed on the console the name Array, the filetredNames array and the searchBar.text here's the result:

console log

how is possible that the "Discus" value is not included when typing the d? it happens with all letters (eg. discus return zero result and so on)

Thank you

Upvotes: 1

Views: 1249

Answers (3)

David Pasztor
David Pasztor

Reputation: 54706

The problem is that you are only searching for the lowercased version of the searchbar input.

You should use localizedCaseInsensitiveContains as the filter criteria.

names.filter{$0.localizedCaseInsensitiveContains(searchBar.text!)}

This way you don't have to handle upper/lowercase separately by hand, both will be handled by the function automatically.

Upvotes: 1

paulvs
paulvs

Reputation: 12053

You need to lowercase both the search text as well as the name property when searching for strings using .range(of:.

Upvotes: 1

torinpitchers
torinpitchers

Reputation: 1292

The Problem

You have changed the searchText to be lowercase however your datasource (names) contains uppercase letters.

The Fix

Change:

$0.name.range(of: lower)

To:

$0.name.lowercased().range(of: lower)

Upvotes: 1

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