Using Breakpoint Actions for Logging

Q:  How do I use Breakpoint Actions for logging debug messages?

A: Traditionally, many programmers have used printf, NSLog, and similar facilities for tracing execution through in code. Similar functionality can be achieved using Breakpoint Actions, which allow you to attach a set of log expressions to a standard debugging breakpoint.

The steps for logging via a Breakpoint Action are:

• Set a breakpoint by clicking once in the editor window's "gutter".

• Control-click (or right-click) to display the breakpoint context menu, and choose "Edit Breakpoint". This will open the breakpoints window.

• Click the "+" button to open the breakpoint actions.

• Enter your log text.

• Click the top right checkbox to ensure that execution continues when the breakpoint is hit.

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