How to check if textField is equal to a string from an array

Question

I have a list of ATM, each ATM has a name.

Now I want to check if my textField.text is equal to that name of each ATM. Surely, I can do this with for loop like so:

for atm in atms {
     if nameTextField.text == atm.name {
         // Do some Stuff
     }
}

But the question here is I want another way to archive this.

Any helps would be appreciated, thanks.

UPDATE 1:

@IBAction func addButtonTapped(sender: UIButton) {
        if let _ = atms.filter({$0.name == nameTextField.text}).first {
            let alert = UIAlertController(title: "This name has been added!", message: nil, preferredStyle: .Alert)
            alert.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
            presentViewController(alert, animated: true, completion: nil)
        } else if nameTextField.text != "" && addressTextField.text != "" && latitudeTextField.text != "" && longitudeTextField.text != "" {
            saveData()
            dismissViewControllerAnimated(true, completion: nil)
        } else {
            let alert = UIAlertController(title: "Missing Info", message: nil, preferredStyle: .Alert)
            alert.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
            presentViewController(alert, animated: true, completion: nil)
        }
    }

Work now, thanks for the answer.

There isn't another way to do it. If you have a names array, you could do: names.contains(nameTextField.text) — Héctor Valls
– Héctor Valls, Commented Apr 8, 2016 at 5:53
If I create a names array, I still need a for loop to assign atm's name to each element. — Twitter khuong291
– Twitter khuong291, Commented Apr 8, 2016 at 5:54

Héctor Valls · Accepted Answer · 2016-04-08 06:25:11Z

4

You can do this:

if let atm = atms.filter({$0.name == nameTextField.text}).first {
   //Show alert
    let alert = UIAlertController(title: "This name has been added!", message: nil, preferredStyle: .Alert)
    let action = UIAlertAction(title: "Ok", style: .Default, handler: nil)
    alert.addAction(action)
    presentViewController(alert, animated: true, completion: nil)
} else {
   //do another stuff
}

It will check the first atm that matches

edited Apr 8, 2016 at 6:25

answered Apr 8, 2016 at 6:05

Héctor Valls

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6 Comments

Twitter khuong291 Over a year ago

It doesn't present an alert when I type a same name, could you check my update.

Héctor Valls Over a year ago

Of course it doesn't. It just check if textfield content is equal to any atm's name. It was what you were asking for, wasn't it?

Twitter khuong291 Over a year ago

po atms.filter({$0.name == nameTextField.text}).first nil

Héctor Valls Over a year ago

Is your addButtonTapped(sender: UIButton) called? Have you linked the action correctly?

Twitter khuong291 Over a year ago

Yes, it is called, but I po atms.filter({$0.name == nameTextField.text}).first, it goes nil.

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