Find Callers of methods or variables in Xcode

What is Caller

Callers or Call Hierarchy shows you all the places (files and line of codes) where a method, function, or variable is used.

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How to Find Caller of Call Hierarchy in Xcode

There are several ways to find callers in Xcode. I will give you three ways to do it.

1. Command + Click
2. Related Items
3. Search Interface

Command + Click

You can find callers via a context menu.

To do that.

1. Command + Click (or Command + Control + Click) on a method, function, or variable name will open up the actions menu that you can do on that object.

2. Select "Callers", and Xcode will show all the places that the variable is used.

Related Items

You can also find callers in the Related Items.

To find the callers.

1. Move the cursor to a method or a variable that you want to find the callers.
2. Then Click on the "Navigation to Related Items" button or
   Press ⌃ – control + 1 or
   Select View menu > Editor > Show Related Items.
3. All callers will show under the Callers menu item.

Search Interface

You can also find the callers via the search interface.

To do that.

1. Move the cursor to a method or a variable that you want to find the callers.
2. Press ⌃ – control + ⇧ - shift + ⌘ - command + H.
3. All the places that the method or variable is called will show up in the Find Navigator panel.

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What is the benefit of Call Hierarchy

Knowing the number of callers gives you a rough idea of the dependency you have around a method or variable, which is useful when you are about to make changes.

An ability to show all the places that call a method is also valuable when debugging. You can ensure all the call sites are fixed along with the broken ones.