FMDB可以是一个如果你没有作为NSNumber传递对象，那就很挑剔。这是格式化查询的受支持且安全的方式。

FMDB can be a little finicky if you dont pass in the object as an NSNumber. This is the supported, and safe way of formatting queries.

[db executeUpdate:@"DELETE FROM theTable WHERE id = ?", [NSNumber numberWithInt:myObject.id]];