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

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