I just purchased the book Programming Cocoa with Ruby, and am working
through the examples using Macruby.
This tiny app works fine in rubycocoa, but in macruby the created
statusbar item immediately disappears.
{{{
#!/usr/bin/env macruby
framework 'cocoa'
class App
def applicationDidFinishLaunching(aNotification)
statusbar = NSStatusBar.systemStatusBar
status_item =
statusbar.statusItemWithLength(NSVariableStatusItemLength)
image = NSImage.alloc.initWithContentsOfFile("stretch.tiff")
raise "Icon file 'stretch.tiff' is missing." unless image
status_item.setImage(image)
end
end
NSApplication.sharedApplication
NSApp.delegate = App.new
NSApp.run
}}}
I assumed this had to do with garbage collection because in obj C
status_item would have to be retained, and so I changed "status_item"
to "@status_item" and then it works fine.
However while playing around with it I also noticed that if I leave
status_item as a local var and add a "sleep 1" at the end of
applicationDidFinishLaunching, it also works fine and the status item
never disappears.
So now I'm not sure whether there is a bug or not. In general, what is
the intended behaviour of Macruby with local variables referring to
objects that would have to be retained in obj C when said variables go
out of scope?
Cheerio,
Michael Johnston
lastobe...@mac.com
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