Question

What’s the difference between:

myBarButtonItem.enabled = NO;

and

myBarButtonItem.userInteractionEnabled = NO;

Does the button become gray each time?

Answer 1

From the apple documentation uibarbuttonitem does not posses userInteractionEnabled property.Since it inherits from UIBarItem Class Reference it also does not have userInteractionEnabled property.

And also if you use this line myBarButtonItem.userInteractionEnabled = NO;
your app will crash.

If you dont want your button to get pressed use this:-myBarButtonItem.enabled = NO;
Also see apple documentation.

For the regular Button:-

myButton.userInteractionEnabled = NO; will cause no effect in your image image and you can not press it also.

myButton.enabled = NO; will cause the shadow to come on your button image and you can not press it also.