如何將sqlite3_stmt返回到調用對象

Question

我正在開發iPhone應用程序。我創建了一個可用的類，其中寫入了一個sqlite getData方法。我想從我的控制器傳遞一個sql語句，並希望返回所有行的數組。

我可以將sqlite3_stmt對象存儲到數組中並返回該數組，因此在調用點處我可以將其轉換並找出每列值？

我當前的代碼就是這樣：

-(NSMutableArray*)getData:(NSString*) SqlQuery 
{  
// The Database is stoed in the application bundle 
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; 
NSString *path = [documentsDirectory stringByAppendingPathComponent:@"sqliteClasses.sqlite"]; 

if(sqlite3_open([path UTF8String], &contactDB) == SQLITE_OK) 
{ 
    const char *sql = (const char*)[SqlQuery UTF8String]; 
    sqlite3_stmt *compiledStatement; 

    if(sqlite3_prepare_v2(contactDB, sql, -1, &compiledStatement, NULL) == SQLITE_OK) 
    { 
     // Loop through the results and add them to the feeds array 
     while (sqlite3_step(compiledStatement) == SQLITE_ROW)//(stepResult == SQLITE_ROW) 
     { 
      // [arrayRecords addObject:compiledStatement];     
     } 
    }  
    sqlite3_finalize(compiledStatement);   
} 
sqlite3_close(contactDB); 
return arrayRecords; 

}

誤差線爲：[arrayRecords ADDOBJECT：compiledStatement];

我該如何做到這一點？任何替代實施？

謝謝。

Answer 1

- (NSArray *) getActionWithFilters:(NSDictionary *)dictionary ClassName:(NSString *)className Error:(NSError **)error{ 
    NSString *query = [NSString stringWithFormat:@"SELECT * FROM %@ %@",className,[self getFitlerArrayByDictionary:dictionary]]; 
    sqlite3_stmt *statement = [self getItemsWithQuery:query]; 

    NSMutableArray *array = [[NSMutableArray alloc] init]; 
    while (sqlite3_step(statement) == SQLITE_ROW) { 
     NSMutableDictionary *itemDic = [[NSMutableDictionary alloc] init]; 
     int columns = sqlite3_column_count(statement); 
     for (int i=0; i<columns; i++) { 
      char *name = (char *)sqlite3_column_name(statement, i); 
      NSString *key = [NSString stringWithUTF8String:name]; 
      switch (sqlite3_column_type(statement, i)) { 
       case SQLITE_INTEGER:{ 
        int num = sqlite3_column_int(statement, i); 
        [itemDic setValue:[NSNumber numberWithInt:num] forKey:key]; 
       } 
        break; 
       case SQLITE_FLOAT:{ 
        float num = sqlite3_column_double(statement, i); 
        [itemDic setValue:[NSNumber numberWithFloat:num] forKey:key]; 
       } 
        break; 
       case SQLITE3_TEXT:{ 
        char *text = (char *)sqlite3_column_text(statement, i); 
        [itemDic setValue:[NSString stringWithUTF8String:text] forKey:key]; 
       } 
        break; 
       case SQLITE_BLOB:{ 
        //Need to implement 
        [itemDic setValue:@"binary" forKey:key]; 
       } 
        break; 
       case SQLITE_NULL:{ 
        [itemDic setValue:[NSNull null] forKey:key]; 
       } 
       default: 
        break; 
      } 
     } 
     [array addObject:itemDic]; 
     [itemDic release]; 
    } 

    return [array autorelease]; 
}