向用于从数据库中获取数据的 NSString 添加双引号

Question

I have a string like this nsstring *mystring=@"vikas"; now i want to add this " so the new string would be "vikas"

any way to do this?

I want to perform some query like :-

NSString *myQuery=[NSString stringWithFormat:
                  @"select * from questiontable where order = %d",ordernumber];

where i want to add double quotes on order like :- "order"

Answer 1

You should be writing query in NSString in format:

NSString *myQuery = [NSString stringWithFormat:
              @"select * from questiontable where \"order\" = %d",ordernumber];

It must work fine.

Answer 2

Trace! You can follow the Pratyusha's approach. And, also if you use single quote than also I think your query will be executed. Have you tried that means put your vikas in like that manner- 'vikas', or in the case of assigning the same to NSString like that:-

NSString *mySingleQuotedString = @"'vikas'";

I hope, it'll also worked. Please try it. :)