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Madhuri Kulukuru1,083 Points
Diff. between instance variable and property
When should we use what - instance variable vs. property? What's the difference?
Holger Liesegang50,595 Points
be sure to check out Should I Use a Property or an Instance Variable?.
Personally I prefer using properties to direct ivar access as they do at the Big Nerd Ranch but as the above info states: "...but take a sampling of the Objective-C community and you’ll find almost as many answers as there are developers" :)
Here is some more info to really understand the difference in more detail: Properties Encapsulate an Object’s Values/Most Properties Are Backed by Instance Variables