Question

If I declare instance variables and objects in my header between brackets with “IBOutlet” in front of them, do I have to set the objects properties?

Also does this mean they are private? What does it mean for them to BE private???

Answer 1

No,It is not necessary to set properties for IBOutlets, Just declaring them would be enough
for eg:

 IBOutlet UIbutton *btn;

If you want the variables to be private then you will have to declare it in this form

@interface myclass:NSObject
{
   @private
   int var1;
}

Instance variables declared as private in a class can be accessed only by an instance of the class.