Question

For example, I have a UISlider that calls - (IBAction)sliderMoved:(id)sender, which performs some task once a new value has been “slid” to through the Value Changed event. But what if I want to do something based on whatever its initial value is?

Hard-coding something to match the default value in Interface Builder would be sloppy and hard to debug later if someone changes the nib file. So, how can I access the default value set for this UISlider in Interface Builder?

AND, more generally speaking, how does one access these attributes for any such UI element? Are there setter/getter methods already synthesized for these?

Answer 1

As Maunil said, Use bindings to connect the UISlider in InterfaceBuilder to a UISlider object in the code. Once this is done, you can access all its methods & properties.

To set the initial value, use the setValue: property of the UISlider, something like:

- (void)viewDidLoad {
    ...
    // where mySlider is declared as a UISlider object and bound to your XIB slider
    [mySlider setValue:some_default_value];
    ...
}

See the UISlider Class Reference documentation for more information.