AppCode 2020.2 Help

Code reference information


In AppCode, you can see where and how symbols, such as 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 ⌃⇧I (or click View | Quick Definition).

Quick Definition popup

Alternatively, with the Ctrl 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.

View definition in a tooltip

Click the Open in Find 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 F4. To open the definition without closing the popup, click the Show Source ⌃⏎.

Type definitions

The Quick Type Definition feature allows you to view the type definition of variables, fields, methods, or any other symbols in a popup without switching from the code you're editing.

  • Place the caret at the symbol for which you want to view the type definition and select View | Quick Type Definition.

    Viewing type definition in a popup

AppCode doesn’t have a default keyboard shortcut for this action, but you can manually configure it in the settings. For more information on how to configure custom shortcuts, refer to Configuring keyboard shortcuts.

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

Show full method or function signatures

By default, the parameter info popup shows simple signatures. You can configure the IDE to show full signatures that include method names and returned types.

  • In the Preferences dialog ⌃⌥S, go to Editor | General | Code Completion, and select the Show full method signatures checkbox.

    Full signatures enabled

Configure the parameter info popup

  1. In the Preferences dialog ⌃⌥S, 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 supported markup, or with the SDK documentation.

  • Hover the mouse over the necessary symbol to view its documentation, or place the caret at the symbol, and press ⌃Q (View | Quick Documentation).

    Press ⌃Q again to switch between the popup and the toolbar.

    Quick Documentation popup

Click the Show Options Menu icon in the popup to change the font size, display the quick documentation toolbar, or go to the source code.

Disable quick documentation on mouseover

  • In the Preferences dialog ⌃⌥S, go to Editor | Code Editing | Quick Documentation and clear the Show quick documentation on mouse move checkbox.

    You can also click the Show Options Menu icon in the popup and disable the Show on Mouse Move option.

In this case, to view documentation for a symbol at caret, press ⌃Q or select View | Quick Documentation from the main menu.

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 ⌃⌥S, go to Editor | External Documentation.

  2. Choose Default web browser or Dash.

Type info

In AppCode, you can identify the type of an expression in the following way:

  • Place the caret at the necessary code element and press ⌃⇧P (or select View | Type Info from the main menu).

Showing the expression type info

Context info

If the current method or class declaration is not visible, you can view it in the tooltip that appears in the top-left corner of the editor. To do this, press ⌥Q or select View | Context Info from the main menu.

View context info
Last modified: 19 August 2020