Open Files in New Tabs Instead of New Windows in Xcode: A Tech Support Guide

Open Files in New Tabs Instead of New Windows in Xcode: A Tech Support Guide

As a developer, you likely spend a significant amount of time working within Xcode, Apple's integrated development environment (IDE) for macOS. Whether you're building applications for iOS, macOS, watchOS, or tvOS, Xcode serves as the hub of your development activities. This article will provide a comprehensive guide on how to configure Xcode to open files in new tabs instead of new windows, enhancing your workflow and streamlining your development process.

Why Open Files in New Tabs?

When working on a project with multiple files, it's common to have several documents open simultaneously. Switching between these files in separate windows can become tedious and inefficient. By configuring Xcode to open files in new tabs instead, you can maintain a more organized workspace, making it easier to manage and navigate through your project files.

Enabling Open in New Tab in Xcode

Starting with Xcode 9, Apple introduced the ability to open files in tabs. By default, this feature is enabled. However, if you're working with an older version of Xcode or if the option has been disabled, follow these steps to enable it:

1. Launch Xcode and navigate to the "Xcode" > Preferences menu.
2. In the Preferences window, click on the "Navigator" tab.
3. Locate the "Open Files" section, and ensure the "In Tabs" option is checked.

Opening External Files in New Tabs

By default, when opening external files in Xcode, a new window is created. To change this behavior and open external files in new tabs instead, follow these steps:

1. In Xcode, choose the "Xcode" > Open Developer Tool" > Terminal" menu item.
2. Type or paste the following command in the terminal:

Command Breakdown

The command provided above sets a default value for the Xcode application, specifically for the NSUserDefaultsExplorerResetPreferenceKeyForOpenInTab key. This key is responsible for controlling whether external files are opened in new tabs or new windows when Xcode is launched:

• defaults write: Writes a default value to the specified property list.
• com.apple.Xcode: Identifies the application for which the property list is being modified (Xcode).
• NSUserDefaultsExplorerResetPreferenceKeyForOpenInTab: The key controlling the open-in-tab behavior for external files.
• false: Sets the value of the key to false, resulting in external files opening in new tabs.

Restoring Default Open-in-Window Behavior

If you would like to revert the open-in-tab behavior back to the default open-in-window behavior for external files, use the following terminal command:

• Configuring Xcode to open files in tabs can enhance your workflow and maintain a more organized workspace.
• By enabling the "In Tabs" option in Xcode's "Preferences", you can open files in tabs instead of windows.
• Modifying the NSUserDefaultsExplorerResetPreferenceKeyForOpenInTab key with the Terminal allows you to control the behavior of opening external files in new tabs or new windows.

References

• Xcode Navigator Preferences
• NSUserDefaults Class Reference
• How to force Xcode to open every file in new tab rather than new window