问题出在-ObjC上。虽然我之前添加了-ObjC，但我知道为什么它不起作用但是当我删除并再次添加它开始工作。也许我先复制粘贴它，以便有任何空间或东西。

Hi the problem is with the -ObjC. Though i ve added the -ObjC earlier but i dnt know why it was not working but when i delete and again add it starts working. Maybe i copy-paste it earlier so there is any space or something.