Question

我想从SQLite表中的最后一个插入值中获取id。我用以下方法来实现这一点。它没有得到价值。

NSString *insertSQL = [NSString stringWithFormat:
                                   @"INSERT INTO beacons (beacon_id, vendor_name, enter_message, enter_image, vendor_image, time_interval, received_date, uuid, major, minor) VALUES (\'%@\', \'%@\', \'%@\', \'%@\', \'%@\',%d, \'%@\', \'%@\', %d, %d)",
                                   id, vendorName, sampleMessage, entryImage, thumbnail, [interval intValue], date, uuid, [majorId intValue], [minorId intValue]];

            const char *insert_stmt = [insertSQL UTF8String];
            sqlite3_prepare_v2(_beaconDB, insert_stmt,
                               -1, &statement, NULL);
            long long lastRowId = sqlite3_last_insert_rowid(_beaconDB);
            NSString *rowId = [NSString stringWithFormat:@"%d", (int)lastRowId];
            [identity insertObject:rowId atIndex:i];
            if (sqlite3_step(statement) == SQLITE_DONE)
            {
                NSLog(@"Successfully saved");
            }

在上面的代码中，值已成功插入数据库表。但是最后插入的值的唯一ID不会返回。

提前致谢。

Answer 1

在插入sqlite3_step行后，您需要获取最后一行ID 。

NSString *insertSQL = [NSString stringWithFormat: @"INSERT INTO beacons (beacon_id, vendor_name, enter_message, enter_image, vendor_image, time_interval, received_date, uuid, major, minor) VALUES (\'%@\', \'%@\', \'%@\', \'%@\', \'%@\',%d, \'%@\', \'%@\', %d, %d)", id, vendorName, sampleMessage, entryImage, thumbnail, [interval intValue], date, uuid, [majorId intValue], [minorId intValue]]; const char *insert_stmt = [insertSQL UTF8String]; sqlite3_prepare_v2(_beaconDB, insert_stmt, -1, &statement, NULL); if (sqlite3_step(statement) == SQLITE_DONE) { NSLog(@"Successfully saved"); long long lastRowId = sqlite3_last_insert_rowid(_beaconDB); NSString *rowId = [NSString stringWithFormat:@"%d", (int)lastRowId]; [identity insertObject:rowId atIndex:i]; }

仅供参考 - 您还需要进行更多错误检查，并且在完成后需要清理准备好的语句。

SQLite没有在iphone应用程序中获取最后插入的行ID

1 个答案: