Cannot link plugin.py to xib in Xcode

1

Hello, I am trying to get my hands wet with Xcode. Unsurprisingly, I’m confused. Somehow I am entirely unable to link the IBOutlet() thingies to my xib file. I followed the tutorials on git to the letter but cannot figure out where I’m going wrong. For starters, I get the following:

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In Xcode, I’m not sure how it’s supposed to work, but Control-dragging things doesn’t seem to work. When I Control-drag from a checbkox in the xib to File’s Owner, I get a popup only reading “Outlets: formatter, menu, nextKeyView”, but not my IBOutlets I have defined in my plugin.py. I added the plugin class name as the name for the File’s Owner. The plugin.py file is added as a file via “Add File…”.

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Screen Recording 2022-08-18 at 01.24.15

Help. Please.

2

The latest version of Xcode do not work with python files. It doesn’t read the outlet definitions any more. I’ll see what the best workaround is.

3

If you have access to the current Xcode beta (not sure if you need an Apple Developer account for that), there the bug is fixed.

4

Or you edit the XML file manually :grimacing:

5

Haha. I actually tried that and got it to work for one UI element, after half an hour. Then decided it’s probably time invested better otherwise :grin:

6

If you know what to do, it is only a matter of second. You need to add that one outlet line. Then you can make the connection in Xcode.

7

I’m working in Xcode 14 beta now. Linking stuff between xib and Python files works! Problem is, there seems to be something wrong with compiling the .xib:

xcode-select: error: tool 'ibtool' requires Xcode, but active developer directory '/Library/Developer/CommandLineTools' is a command line tools instance

Any way to compile my xib regardless?

8

Never mind, there was an issue with my installation directory of Xcode. Works now.

9

Hello again. I’m having a very annoying issue again. Everything should be working, but for some reason, the link between my text field in the xib and my python plugin doesn’t work.

I have this set up in the plugin.py:

@objc.IBAction
def set_value_(self, sender):
  print(sender.floatValue())

This is linked in Xcode (slightly different names of course):
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But when changing the value in the UI, nothing happens. Nothing is printed to the macro window, the function is not called. Why?

Edit: no idea what it was in the end, but I used camel case for the action functions, tried out different ways of getting the sender values and wrapping them as str()/float() in python. In any case, it works now.

10

Always use camel case in selector names. Underscored have a special meaning in pyobjc (they replace the colons and argument positions). Extra ones will mess things up.

11

Right, thanks. My Python IDE just rightfully complains if I name functions in camel case, that’s pretty much illegal in PEP :wink: Good to know!