Extract method

Basics

When the Extract Method refactoring is invoked, AppCode analyses the selected block of code and detects variables that are the input for the selected code fragment and the variables that are output for it.

The detected output variable is used as a return value for the extracted function.

Extracting a method

In the editor, select a block of code to be transformed into a method or a function.

The code fragment to form the method does not necessarily have to be a set of statements. It may also be an expression used somewhere in the code.
On the main menu or on the context menu of the selection, choose Refactor | Extract | Method or press N/A.
In the Extract Method dialog box that opens, specify the name of the new function.
Specify method parameters.
In the Targets selector, choose where the method should be declared - in the header file, in a private category, or in the implementation file.
Check the result in the Signature Preview pane and click OK to create the required function.
The selected code fragment will be replaced with a function call.

Last modified: 19 September 2019