ios - Swift can not see objc class function using block -

i using hmsegmentedcontrol(https://github.com/heshammegid/hmsegmentedcontrol) in swift.

when tried use following function

- (void)setindexchangeblock:(indexchangeblock)indexchangeblock;

xcode not find function when used following syntax

categoriesview.setindexchangeblock {  } 

it says "hmsegmentedcontrol not have member named categoriesview.setindexchangeblock. noticed function in hmsegmentedcontrol not use block has been recognized xcode.

- (void)setselectedsegmentindex:(nsuinteger)index animated:(bool)animated; 

how fix it?

thanks!

set block using this

categoriesview.indexchangeblock = { (index) in    if index == 0 {   //do   } }