Question

I have multiple input fields in a mobile (iOS and Android) app that I would like to validate.

Some I would only like numbers, others can’t contain special characters and some need to be doubles.

Does anyone know any classes that can handle this and manage an error message?

Cheers

Answer 1

You can do with restrict property of TextInput class.

<s:TextInput id="txtOnlyNumbers" restrict="[0-9]" maxChars="9" /> here no error message will come we are preventing from user typ

(OR)

           var regOnlyNumbers:RegExp = /[0-9]/g;
            var numbers:String = "12345";
            Alert.show("Is Contains only Numbers " + regOnlyNumbers.test(numbers));

            var regIsSpecialChars:RegExp = /\W/g;
            var special:String = "12345";
            Alert.show("Is Contains special char " +regIsSpecialChars.test(special));

            var regIsSpecialChars:RegExp = /\W/g;
            var special:String = "123@45";
            Alert.show("Is Contains special char " +regIsSpecialChars.test(special));

Your set TextInput errorString property like

txtUserName.errorString = "It Contains interger";

It will show red border around textinput visual object and show will show when mouse over the textinput.

Do like

var regIsSpecialChars:RegExp = /\W/g;
if(regIsSpecialChars.test(txtUserName.text))
{
  txtUserName.errorString = "User Name having some special character(s)";
}