Extract Property is a refactoring in Objective-C for converting a selected expression to property.

Place the caret at a local variable or select an expression to apply the refactoring to and press &shortcut:CIDR.Lang.ObjC.IntroduceProperty; (Refactor | Extract Property):

If you want the property to be generated in a private category, select the Put to private category checkbox. Otherwise, the property will be declared in the header file.