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Intermediate iOS Debugging

Prepare to learn some new debugging tricks! In this course, you’ll improve your skills with LLDB and Xcode. By Jessy Catterwaul.

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Who is this for?

This course will provide you with more debugging techniques to use, after you’ve mastered the basics.

Covered concepts

  • LLDB
  • Debugging
  • Breakpoints
  • Threading

Part 1: LLDB

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Learn about the three ways to inspect data in your app and the danger that comes with that power.

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Use LLDB to create new variables, and learn to use them effectively to make your debugging life easier.

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LLDB offers commands for step-based control, i.e. “Step Into”, “Step Over”, “Step Out”, and “Continue”.

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Use a flag to allow a method called from the LLDB command line to stop at breakpoints in that method.

Part 2: Xcode

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Swift Error Breakpoints are great for getting to the root cause of unexpected behavior, when it’s caused by errors thrown deep within your own code.

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Breakpoints can be shared in two ways: between projects just on your own system, or as a file, for multiple users of a project.

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Learn how to quickly spot issues where your code is being called from a background thread, when it should not.

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See how this tool helps pinpoint memory issues - taking you right to the line of code where a retained object was instantiated.

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When it’s impossible to insert a breakpoint into a chain of Combine methods, where you need it, Publisher’s “breakpoint” methods can come to your rescue.

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Learn how easy it is to debug without having to tether your device to your Mac. It’s a necessity for the Apple Watch and TV, but works with all devices.