Using XCode, I am trying to figure out how to display a different image when someone clicks or presses down on one of my buttons before being taken to a second screen. For example, I have a contact icon on my home screen. When a user clicks the icon, it should change to a darker version on tap before going to the contact screen. Any help is appreciated.

-(IBAction) ButtonPressed :(id)sender
{
UIButton *tempButton = (UIButton *) sender;
int tag = tempButton.tag;
NSString *viewName;
switch (tag) 
{
    case 1:
        [FlurryAnalytics logEvent:@"Contact-Screen"];
        viewName = @"ContactScreen";
        if( self.appDelegate.sound)
            [Click play];
        [self.appDelegate moveToView:viewName];
        break;
}
}