问题
From my wxpython GUI app I have an rsync task that I kick off as a multiprocessing.Process.
The idea is to update a wx.textCtrl with the constant output from this background process.
I am using a pubsub subscribe method.
The functions work fine but I can't get the textCtrl to update.
If I use a CallAfter method I get this crash/error:
The process has forked and you cannot use this CoreFoundation functionality safely. You MUST exec(). Break on THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNCTIONALITY___YOU_MUST_EXEC() to debug.
If I don't use that method and I try to append the text directly to the textctrl nothing happens.
Any ideas?
Thanks!
Adam
回答1:
The problem is that the child process can't write back to the main process. Use a queue to pass messages back to the main process, and update the control from within a timer or a background thread that waits for messages from the queue.
来源：https://stackoverflow.com/questions/37667606/wxpython-3-0-multiprocessing-update-gui-from-background-process