AppCode 2019.3 Help

Code reference information

This section describes how to see definitions of symbols, display documentation references, and use the view parameter information feature.


In AppCode, you can see where and how symbols, such as tags, classes, fields, methods, or functions are defined in your project. For this purpose, the IDE features the Quick Definition popup.

  • To view definition of a symbol, select it in the editor and press ⌥Space (or click View | Quick Definition).

Quick Definition popup

Alternatively, with the key pressed, hover the cursor over any symbol. AppCode displays the symbol as a link and shows its definition in a tooltip. Click this link to jump to the definition of the symbol.

Click the Open as Tool Window icon in the top-right corner to open the definition in the Find tool window. To open the source code of the definition for editing and close the popup, click the Edit Source icon⌘↓. To open the definition without closing the popup, click the Show Source ⌘⏎.

Parameter info

The Parameter Info popup shows the names of parameters in method and function calls. AppCode automatically shows a popup with all available method signatures within 1 second (1000 milliseconds) after you type an opening bracket in the editor, or select a method from the suggestions list.

You can explicitly invoke the popup if it has closed or if your IDE is configured not to show the popup automatically. To do so, press ⌘P (or click View | Parameter Info).

Parameter info popup

Configure the parameter info popup

  1. In the Preferences dialog ⌘,, go to Editor | General | Code Completion.

  2. In the Show the parameter info popup in ... milliseconds field, specify the time in milliseconds after which the popup should appear.

If you don't want the popup to appear automatically, clear the Show the parameter info popup in ... milliseconds checkbox.

Quick documentation

You can get quick information for any symbol or method signature by means of the Quick Documentation popup. Note that the symbol must be supplied with documentation comments created in accordance with AppleDoc/HeaderDoc/Doxygen markup, or with documentation from an SDK.

  • To view documentation for a symbol at caret, press F1 (or click View | Quick Documentation).

    You can press F1 again to switch between the popup and the toolbar.

Quick Documentation popup

Click the Settings icon to change the font size, display the quick documentation toolbar, or go to the source code.

Automatically show quick documentation

  1. In the Preferences dialog ⌘,, go to Editor | General.

  2. In the Other area, select the Show quick documentation on mouse move checkbox and specify the delay in milliseconds after which the popup should appear.

External documentation

External documentation opens the necessary information in a web browser, so that you can navigate to related symbols and keep the information for further reference at the same time. AppCode shows documentation for Foundation Framework Classes.

View external documentation

  • To view documentation for a symbol at the current caret position in a web browser, press ⇧F1 or select View | External documentation from the main menu.

Select a browser for external documentation

  1. In the Preferences dialog ⌘,, go to Editor | External Documentation.

  2. Choose Default web browser or Dash.

Context info

If the current method or class declaration is not visible, you can view it in the tooltip by pressing⌃⇧Q.

View context info
Last modified: 6 February 2020