Question

I set this in a .h file:

#define ID_ACTIVE 2

then used this in a .m file sqlite statement:

NSString *query = @"SELECT task FROM tasks WHERE task_state = 'ID_ACTIVE'";

but when I look at ‘query’ via gdb it gives me this query statement:

SELECT task FROM tasks WHERE task_state = 'ID_ACTIVE'

Shouldn’t the preprocessor have replaced ID_ACTIVE with 2?

Answer 1

In your code, you can use the ID_ACTIVE as an int variable.

1. If task_state is a string, use,

   NSString *query = [NSString stringWithFormat:@"SELECT task FROM tasks WHERE task_state = '%d'", ID_ACTIVE];
   

2. If it is a number, then use,

   NSString *query = [NSString stringWithFormat:@"SELECT task FROM tasks WHERE task_state = %d", ID_ACTIVE];