Tim Gleue gleue
gleue
/ UITextFieldDelegate.m
Last active
January 5, 2022 03:41
Force input into UITextField to uppercase
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| - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string | |
| { | |
| // Inspiration: http://stackoverflow.com/a/6265614 and http://stackoverflow.com/a/13388037 | |
| // | |
| // Check if the added string contains lowercase characters. | |
| // If so, those characters are replaced by uppercase characters. | |
| // | |
| NSRange lowercaseCharRange = [string rangeOfCharacterFromSet:[NSCharacterSet lowercaseLetterCharacterSet]]; | |
| if (lowercaseCharRange.location != NSNotFound) { |