How to communicate from nRF52832 to iPhone

Hi.

I am trying  communication  from nRF52832 to iPhone using ble.

I use main function  which put in nRF5_SDK_17.0.2_d674dde\examples\ble_peripheral\ble_app_uart.

But,I don't know a this method of communication between nRF52832 and iPhone.

It is possible to communicate , if added next sub function  in main function?

ble_nus_data_send(&m_nus, data_array, &length, m_conn_handle);

Thank you

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