iOS / Objective c - UITabBarControllerDelegate - Custom tab animation delegates not called -

i trying create custom tabbar animation when user taps on tab bar button.

i have implemented uitabbarcontroller subclass implements uitabbarcontrollerdelegate

here .m

#import "mycustomtabbarcontroler.h"   @interface mycustomtabbarcontroler ()  @end  @implementation mycustomtabbarcontroler  - (void)viewdidload {     [super viewdidload];      self.delegate = self; // set delegate self  }   #pragma mark - uitabbarcontrollerdelegate  - (bool)tabbarcontroller:(uitabbarcontroller *)tabbarcontroller shouldselectviewcontroller:(uiviewcontroller *)viewcontroller {      //this called know delegate working      nslog(@"the tabbarcontroller delegate set , working");     return yes; }  //this delegate method never called  - (id<uiviewcontrolleranimatedtransitioning>)tabbarcontroller:(uitabbarcontroller *)tabbarcontroller            uiviewcontrolleranimatedtransitioning:(uiviewcontroller *)fromvc                                              toviewcontroller:(uiviewcontroller *)tovc {       mybartransition *animator = [mybartransition new];     return animator;  }  //this delegate method never called  - (id<uiviewcontrollerinteractivetransitioning>)tabbarcontroller:(uitabbarcontroller *)tabbarcontroller                      interactioncontrollerforanimationcontroller:(id<uiviewcontrolleranimatedtransitioning>)animationcontroller {      mybartransition *animator = [mybartransition new];     return animator; } 

for reason delegate methods responsible transitioning not called. have read docs , can't see reason not called.

i have set delegate correctly , confirmed working implementing shouldselectviewcontroller method

what missing here?

i think using wrong delegate method trying accomplish. try using:

- (nullable id <uiviewcontrolleranimatedtransitioning>)tabbarcontroller:(uitabbarcontroller *)tabbarcontroller             animationcontrollerfortransitionfromviewcontroller:(uiviewcontroller *)fromvc                                               toviewcontroller:(uiviewcontroller *)tovc; 

this called when user taps on different tab.