(sqlite3_step (statement) == SQLITE_ROW) 실행되지 않았습니까?

Question

while (sqlite3_step (statement) == SQLITE_ROW) 루프가 실행되고 있지 않습니다. 아무도 도와 드릴 수 있습니까?

NSLog(@" %d, %d ",sqlite3_step(statement),SQLITE_ROW); 출력은 항상 다음 21 100

sqlite3_stmt *statement; 
    sqlite3 *database; 
if (sqlite3_open("myDB.sql", &database) == SQLITE_OK) { 
    NSLog(@"1 %d",SQLITE_OK); 
NSLog(@" %d, %d ",sqlite3_step(statement),SQLITE_ROW);  
     const char *sql = "SELECT myName FROM myTable"; 
     if (sqlite3_prepare_v2(database, sql, -1, &statement, NULL) == SQLITE_OK) { 
      while (sqlite3_step(statement) == SQLITE_ROW) { 
       int primaryKey = sqlite3_column_int(statement, 0); 

      } 
     } 

     if (statement) { 
      sqlite3_finalize(statement); 
     } 
    } 

Answer 1

Try This, 



sqlite3_stmt *statement; 
     sqlite3 *database; 
     NSString *sqLiteDb = [[NSBundle mainBundle] pathForResource:@"myDB" 
       ofType:@"sql"]; 

      if (sqlite3_open([sqLiteDb UTF8String], &database) != SQLITE_OK) { 
       NSLog(@"Failed to open database!"); 
      } 
      NSLog(@" %d, %d ",sqlite3_step(statement),SQLITE_ROW);  
      const char *sql = "SELECT myName FROM myTable"; 
      if (sqlite3_prepare_v2(database, sql, -1, &statement, NULL) == SQLITE_OK) { 
       while (sqlite3_step(statement) == SQLITE_ROW) { 
        int primaryKey = sqlite3_column_int(statement, 0); 

       } 
      } 
      else { 
       sqlite3_close(database); 
       NSLog(@"Failed to open database with message '%s'.", sqlite3_errmsg(database)); 
      } 

      if (statement) { 
       sqlite3_finalize(statement); 
      } 
     } 

참조 일부 링크이다.

는

• http://dblog.com.au/iphone-development-tutorials/iphone-sdk-tutorial-reading-data-from-a-sqlite-database/

• http://www.scribd.com/doc/11524402/iPhone-Programming-with-SQLite

• http://www.raywenderlich.com/913/sqlite-101-for-iphone-developers-making-our-app

Answer 2

sqlite3 *database; 

    if(sqlite3_open([databasePath UTF8String], &database) == SQLITE_OK) 
    { 
    NSString *sqlStatement = [NSString stringWithFormat:@""SELECT myName FROM myTable"]; 
     sqlite3_stmt *compiledStatement; 
    if(sqlite3_prepare_v2(database, [sqlStatement cStringUsingEncoding:NSUTF8StringEncoding],-1,&compiledStatement, NULL) == SQLITE_OK) 
     { 
      NSLog(@"%@",sqlStatement); 

      if (sqlite3_step(compiledStatement) == SQLITE_ROW) 
      { 
int primaryKey = [[NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement,0)]intValue] ; 
      }  
     } 
     sqlite3_finalize(compiledStatement); 

     sqlite3_close(database); 
    }