Question

I have two view controller in storyboard.
VC1 has three buttons and VC2 has a image view.

When click button A in VC1, then VC2 show image of A.
When click button B in VC1, then VC2 show image of B.

How VC2 can know which button was clicked in VC1?

Answer 1

This is simple!!!

1) in VC2 create NSString property in .h file and then synthesize that in .m file “NSStringObjofVC2”
2) import VC2 in VC1 .h file #import “VC2”
and create object like this

VC2 *vc2Obj;

3) in viewdidload method

vc2Obj = [[VC2 alloc] init];

4) on each button click add this

vc2Obj.NSStringObjofVC2 = @”differentImageNameforAll3Buttons.png”;

last to use the image in VC2

simply use NSStringObjofVC2 in UIImage as filename