Skip to content
Create a gist now

Instantly share code, notes, and snippets.

Embed URL


Subversion checkout URL

You can clone with
Download ZIP
Women Who Code iOS Study group Michele Titolo showed us how to check only for numbers in a UITextFIeld thanks for sponsoring us, SocialChorus!
#pragma mark -
#pragma mark - UITextFieldDelegate
-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
// let's check if the string is range is a number
NSRange characterRange = [string rangeOfCharacterFromSet:[NSCharacterSet letterCharacterSet]];
// if we've detected a character in our string, we're not going to insert that letter character in our text field
if(characterRange.location != NSNotFound) {
return NO;
return YES;
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Something went wrong with that request. Please try again.