iOS swift 群组 getJoinedGroupsFromServerWithPag

  ios swift调用getJoinedGroupsFromServerWithPage崩溃
 [EMGroupManager getJoinedGroupsFromServerWithPage:pageSize:completion:]: unrecognized selector sent to instance 0x1700594d0

2017-08-14 10:45:59.165008+0800 vgbox[463:46040] [Bugly]  Trapped uncaught exception 'NSInvalidArgumentException', reason: '-[EMGroupManager getJoinedGroupsFromServerWithPage:pageSize:completion:]: unrecognized selector sent to instance 0x1700594d0' 

(

    0   CoreFoundation                      0x0000000191cceff0 + 148

    1   libobjc.A.dylib                     0x0000000190730538 objc_exception_throw + 56

    2   CoreFoundation                      0x0000000191cd5ef4 + 0

    3   CoreFoundation                      0x0000000191cd2d4c + 404

    4   CoreFoundation                      0x0000000191bced2c _CF_forwarding_prep_0 + 92

    5   vgbox                               0x000000010019dcd8 _TFFC5vgbox28HYConversationListController11viewDidLoadFT_T_U0_FT_T_ + 432

    6   vgbox                               0x0000000100182e38 _TTRXFo___XFdCb___ + 44

    7   libdispatch.dylib                   0x00000001086a9a50 _dispatch_call_block_and_release + 24

    8   libdispatch.dylib                   0x00000001086a9a10 _dispatch_client_callout + 16

    9   libdispatch.dylib                   0x00000001086b7990 _dispatch_queue_override_invoke + 788

    10  libdispatch.dylib                   0x00000001086b9630 _dispatch_root_queue_drain + 552

    11  libdispatch.dylib                   0x00000001086b939c _dispatch_worker_thread3 + 140

    12  libsystem_pthread.dylib             0x0000000190d8f1d0 _pthread_wqthread + 1096

    13  libsystem_pthread.dylib             0x0000000190d8ed7c start_wqthread + 4

)