UISegmentedControl calls action method on changing selectedSegmentIndex programmatically

Question

I have a a UISegmentedControl in my xib file. It is linked to an action method on value changed event in the xib file.

When I programmatically set the value of selectedSegmentIndex the action method gets called

mysegmentedcontrol.selectedSegmentIndex = index

I was expecting that the action method would only be called when the user changes the control by touching it?

This happens only for UISegmentedControl.

Answer 1

.h file

BOOL isProgramaticallyChanged;

.m file

- (IBAction)segmentAction:(id)sender { // valuechanged connected function

        UISegmentedControl *segControll = (UISegmentedControl *)sender;

    if (segControll.tag == 55) { // while create segment specify tag value to 55 (to set use via IB or Code)

        if (isProgramaticallyChanged == NO) {

            // your valuechanged code here

        }

        else {

            isProgramaticallyChanged = NO; //important

        }

    }

    else if (segControll.tag == 66) { // for many segments

    }

        //...like this do for all segments
}

in .m file

wherever you put this code to change programmatically do before that like this

if (mysegmentedcontrol.selectedSegmentIndex != index) {

    isProgramaticallyChanged = YES;

    mysegmentedcontrol.selectedSegmentIndex = index;

}