Question

I am making an sqlite3 test3.sql database,
making table as

CREATE TABLE rest (name VARCHAR(100), price VARCHAR(100));

table is successfully created but now when I am using a method for inserting and retrieving data, then getting error,,,

The error is on line

NSString *str = [NSString stringWithUTF8String:
                 (char *)sqlite3_column_text(compiledStatement, 1)];

the error is +[NSString stringWithUTF8String:]: NULL cString'

What is this error, how can I remove it?

Answer 1

Instead of just having

... = [NSString stringWithUTF8String:
       (char *)sqlite3_column_text(compiledStatement, 15)]

You want to use something like

... = ((char *)sqlite3_column_text(compiledStatement, 15)) ? 
      [NSString stringWithUTF8String:
       (char *)sqlite3_column_text(compiledStatement, 15)] : nil;