Question

I want to check the password’s complexity with regular expression.
But it returns always true?

The password’s complexity is the following. Allowed are:

• A-Z
• a-z
• 0-9
• special characters: – _ , ; . : # + * ? = ! § $ % & / ( ) @
• No blank characters

Here is my code:

NSString *regExPwd = @"[a-zA-Z_0-9\\-_,;.:#+*?=!§$%&/()@]+";
NSPredicate *pwdCheck = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regExPwd];
bool isValid = [pwdCheck evaluateWithObject:txtPassword.text];

Hope you can help me once again 🙂

Answer 1

You should require that there are only allowed characters from the beginning to the end:

NSString *regExPwd = @"^[a-zA-Z_0-9\\-_,;.:#+*?=!§$%&/()@]+$";