PyObjC - NSTableView with checkboxes mapping to Python throws class is not key value coding-compliant

Asked Nov 07 '14 at 17:17

Active Nov 07 '14 at 17:17

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I am building a Mac application using PyObjC. In Interface Builder I have a NSTableView. The Columns are filled with NSTextFieldCells and NSButtonCells.

I fill it with data using an array controller that itself is filled through a Python list of dicts. Instead of "Python dicts" I have also tried NSMutableDictionary. The keys representing NSTextFieldCells are filled with strings and the NSButtonCells with Booleans. For the latter I have also tried: 1/0, "Yes"/"No", and NSNumber.numberWithBool_ .

The stream of data from Python to the GUI works without a problem.

My problem is, that whenever I click on a checkbox it throws me:

(from bound object <NSTableColumn: 0x1067a52f0> identifier: (null)): [<__NSDictionaryI 0x10a604ed0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key checkb.

How can I get the states of the checkboxes back into my Python code?

asked Nov 07 '14 at 17:17

Jonas Kemper

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Something in your code creates a immutable dictionary. -copy anywhere? – Amin Negm-Awad Nov 07 '14 at 18:02
I'm not sure what could be causing this? What am I supposed to copy where? – Jonas Kemper Nov 07 '14 at 18:19
Okay it works now and it was exactly what you described, which is awesome. Thank you so much. – Jonas Kemper Nov 07 '14 at 19:06

PyObjC - NSTableView with checkboxes mapping to Python throws class is not key value coding-compliant

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