Can I find out the return value before returning while debugging in Xcode?

Question

Take the following function:

func go() {
    return someTablePresenter.getSomeData();
}

When I set a breakpoint in this function, is there a possibility to inspect the returned value?

The only way to inspect the returned datatable is to use a temporary variable. However, that's a bit inconvenient.

Question: Isn't there another way?

You can show the disassembly view and set a breakpoint on a specific instruction, including the return instruction. (The debugger may let you set a breakpoint on the closing brace of the function to achieve the same result.) At that point, you may have to examine registers to see the return value. — Ken Thomases
– Ken Thomases, Commented Dec 3, 2018 at 2:26

Ben · Accepted Answer · 2019-01-15 23:30:00Z

16

If you tap 'step out' then a 'return value' will appear in the debugger variable view source

answered Jan 15, 2019 at 23:30

Ben

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2 Comments

O_o. 12 years working with Xcode, and I'd never seen that before. That's brilliant and comes up all the time. Thank you so much.

does it work with Xcode 15 or 16?

droberson · Accepted Answer · 2018-12-03 00:38:30Z

-3

When setting a break point, double click the line instead of single clicking. That should bring up this window:

Once you see this, click add action, and you can make it automatically print out what you want to see once it hits the breakpoint.

You can even set it to continue past the breakpoint so it will print and keep the program running.

answered Dec 3, 2018 at 0:38

droberson

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