CODEWITHSUNDEEP
swiftsearchhashtag
earth
earth

Reputation: 95

Determining the first letter of the swift text field

I want to determine what the first letter is in a text field. I want to determine whether the first letter is @ or #. What should I do?

    func search() {
        
        searchBar.searchTextField.text?.first
    }

Upvotes: 0

Views: 984

Answers (2)

Shadowrun
Shadowrun

Reputation: 3867

To make an optional string capable of checking for a prefix from a number of strings:

extension Optional where Wrapped: StringProtocol {
    func hasPrefix(_ ss: [String]) -> Bool {
        guard let s = self else { return false }
        return ss.first(where: s.hasPrefix) != nil
    }
}

searchBar.searchTextField.text.hasPrefix(["@", "#"])

Upvotes: 1

πter
πter

Reputation: 2217

You can declare a variable with the characters you are checking for, and check if the first character of your UITextField is in that array:

let checkedCharacters = ["@", "#"]
if let firstCharacter = searchBar.searchTextField.text?.first {
    let containsCharacter = checkedCharacters.contains(firstCharacter)
}

Upvotes: 1

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