Validação de CPF no Swift

cpf.swift

// algoritmo: res1 = sum(digits[0-9] * 10...2) % 11; res2 = sum(digits[0-10] * 11...2) % 11
// if (digit10 == res1 && digit11 && res2) { cpf valido }
func checkIfCPFisValid(obj: AnyObject?) -> Bool
{
    var input: String = ""
    
    if let object = obj as? UITextField {
        input = object.text!
    }
    
    if (input.isEmpty) {
        return false
    }
    
    let cpf = input.characters.filter{"0123456789".characters.contains($0)}
    if cpf.count == 11 {
        let digitTen = (Int(String(cpf[9])) ?? 0)
        let digitEleven = (Int(String(cpf[10])) ?? 0)

        var resultModuleOne: Int = 0, resultModuleTwo: Int = 0, realValue: Int = 0
        var i: Int = 0, j: Int = 11
        for index in 0..<cpf.count-1 {
            realValue = (Int(String(cpf[index])) ?? 0)
            resultModuleTwo += (realValue * j)

            if (i > 0) {
                realValue = (Int(String(cpf[index-1])) ?? 0)
                resultModuleOne += (realValue * j)
            }
        
            i++; j--;
        }
        
        resultModuleOne %= 11
        resultModuleOne = resultModuleOne < 2 ? 0 : resultModuleOne-11
        
        resultModuleTwo %= 11
        resultModuleTwo = resultModuleTwo < 2 ? 0 : resultModuleTwo-11

        if (resultModuleOne == digitTen && resultModuleTwo == digitEleven) {
            return true
        }
    }
    
    return false
}

let cpf: String = "fdasfdfsdf352353"
let ret: Bool

ret = checkIfCPFisValid(cpf)
print ("\n\nret is '\(ret)' and cpf if '\(cpf)'")
if (!ret) {
    print ("CPF é inválido")
} else {
    print ("CPF é válido!! :-)")
}

Actually this don't work…

@ceafdc It works fine, running in production here :) I will change to my last version for my blog,
you can read here and see this working if you like: https://alex.mulatinho.net/2016/03/15/validate-fields-and-other-objects-in-swift-ios/

Thanks for the sharing this, you need to do a little adjustment:

    resultModuleOne %= 11
    resultModuleOne = resultModuleOne < 2 ? 0 :11-resultModuleOne
    
    resultModuleTwo %= 11
    resultModuleTwo = resultModuleTwo < 2 ? 0 : 11-resultModuleTwo