Question

I have a UISplitViewController utility type app where each UIViewController handles various calculations. I have a popover with segmented controls that allows the user to set certain options. The problem I have is when saving and reloading the contents of UITextfields and the selected segment index, if the segment control index was saved and is == 1 a valuechanged event is fired off from viewdidload as the state is set from

   NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
   theDepthSegment.selectedSegmentIndex = [[defaults objectForKey:@"updateMe"] intValue];

Is there anyway to prevent valuechanged being fired as the selectedsegment is set in view did load? or maybe someway to determine the difference between touch events versus code

It seems strange this happens, maybe there is another way….

Thank You

Answer 1

Considering the view is just loading, the segmented control doesn’t have a previous value, so it will assume it is indeed being changed and acts accordingly. One way you could potentially get around this is to set up a BOOL value in your IBAction method linked to the segmented control. At the beginning of your viewDidLoad method, say wasLoaded = NO (where wasLoaded will need to be declared in your header file). Then you’ll assign your selectedSegmentIndex. Afterwards, declare wasLoaded = YES. Finally, in your IBAction method, say something like

if (wasLoaded) { 
    // do what you need to do since this isn't when it's being initialized 
}