ios - Replace ViewController of a tab in a TabBarControlller -

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i have tabbarcontroller & 4 tabs individual viewcontrollers (embedded in navigationcontroller/tableviewcontroller) created using interface. dynamically added multiple barbuttons on viewcontroller1. current view controller of tab 1 has replaced on click of barbutton. how should go it?

this snippet should play around with, hang of more

self.tabbarcontroller.selectedindex = 1;

i have answered question before too, can refer answer here

[self.tabbarcontroller setviewcontrollers:arrayofnewviewcontrollers]; self.tabbarcontroller.selectedindex = 0;

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