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Editorial Team
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Asked: 2026-05-27T05:52:52+00:00

I’m trouble with check the Characters(a-z,A-Z) and special characters except(.) in NSString. I have

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I’m trouble with check the Characters(a-z,A-Z) and special characters except(.) in NSString. I have a UITextField for Price, i need to pass the value for Price only Numbers with “.”[Ex: Price :- 20.00]. I need to check whether any letters,special characters are in NSString, If the Characters,special characters are in NSString (UITextField text), i need to alert the user to enter valid numbers for the Field “Price.”. Please help to solve this problem. Any suggestion/idea would be great. Thanks in advance.

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1 Answer

  1. Editorial Team

    You can use NSCharacterSet to find characters in strings:

    NSCharacterSet *nonDigits = [[NSCharacterSet decimalDigitCharacterSet] invertedSet];
BOOL containsNonDigitChars = [myString rangeOfCharacterFromSet:nonDigits].location == NSNotFound
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