正则判断字符串包含数字、字母、特殊字符串

    NSString *regex4  =@"^(?=.*[\\W\\_]+.*)(?=.*\\d)(?=.*[a-z])(?=.*[A-Z]).{1,10}$";

    NSPredicate *pred4 = [NSPredicatepredicateWithFormat:@"SELF MATCHES %@", regex4];

    BOOL isMatch4 = [pred4 evaluateWithObject:string];

    return isMatch4;