CODEWITHSUNDEEP
swiftif-statement
Boudz78
Boudz78

Reputation: 15

How can i check through an if-statement if a TextField is an integer or not?

How can i check through an if-statement if a TextField is an integer or not ?

@IBAction func Clickme2(sender: AnyObject) {
if TextField2.text == Int()  {
}

Upvotes: 0

Views: 69

Answers (3)

Lumialxk
Lumialxk

Reputation: 6369

If you want to check " 1 2 3 " as int,you can do like this:

@IBAction func Clickme2(sender: AnyObject) {
    var text = TextField2.text.stringByReplacingOccurrencesOfString(" ", withString: "")
    if let integer = Int(text) {
        // do something here
    }
}

If you only want to check " 123 " as int,you can do like this:

@IBAction func Clickme2(sender: AnyObject) {
    var text = TextField2.text.stringByTrimmingCharactersInSet(.whitespaceCharacterSet())
    if let integer = Int(text) {
        // do something here
    }
}

Upvotes: 0

glace
glace

Reputation: 2210

if ( Int(textField2.text) == nil) {
    //In this case, your text is not an integer
}

This works perfectly fine since Swift has those fancy failable Initializers which prevent your app from crashing when you pass invalid parameters

Upvotes: 0

Leo Dabus
Leo Dabus

Reputation: 236275

You can check it the textField text property is not nil and if it can be converted to Int:

guard let text = textField2.text, integer = Int(text) else { return }
print(integer)

If you just need to know if it text property has an Integer you can create a computed property to return true or false as follow:

extension UITextField {
    var isInteger: Bool {
        guard let text = text else { return false }
        return Int(text) != nil
    }
}

usage:

if textField2.isInteger  {
      // do whatever
}

Upvotes: 1

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