UITextField : restrict the maximum allowed value (number) during inputting

Question

I have a UITextField, I\'d like to restrict the maximum allowed input value in the field to be 1000. That\'s when user is inputting number inside, once the inpu

Answer 1

You should do the following inside the above method:

NSString *newString = [textField.text stringByReplacingCharactersInRange:range withString:string];

//first, check if the new string is numeric only. If not, return NO;
NSCharacterSet *characterSet = [[NSCharacterSet characterSetWithCharactersInString:@"0123456789,."] invertedSet];
if ([newString rangeOfCharacterFromSet:characterSet].location != NSNotFound)
{
    return NO;
}

return [newString doubleValue] < 1000;