Book Image

Swift Cookbook

Book Image

Swift Cookbook

Overview of this book

Table of Contents (18 chapters)
Swift Cookbook
About the Author
About the Reviewers

Debugging with LLDB

Debugging with Xcode is fine, but sometimes we are limited, and we have to use the debugger with a lower level. To do this, we have to know that actually Xcode is not debugging anything, it uses another program called LLDB.


Old versions of Xcode are used to debug with GDB instead of LLDB; don't try to use them with Swift because there is no support for Swift on GDB.

It's recommended that you know the LLDB commands if you want to debug big programs. These are also used in cases where you have to connect with another machine (a continuous integration, for example), where you have to do everything through an SSH shell.

Getting ready

Open the checkerboard program and check whether you have any breakpoint and remove all of them.

How to do it...

Debugging with LLDB will involve the following steps:

  1. Click on play and when the program starts, click on the pause button; use the combination control + command + U. After this, you will see the LLDB console:

  2. Now, click on the LLDB console...