Hi Gareth,
On Nov 26, 2009, at 3:51 PM, Gareth Townsend wrote:
Hi,
I've just started playing with MacRuby. So please bear with me,
there's every chance I'm doing something stupid :-) I'm using 0.5
beta 2.
I'm building a simple Cocoa App (http://github.com/quamen/noise) and
am running into some problems while trying to set up a Preference
Pane.
Specifically this error:
Assertion failed: (m != NULL), function rb_vm_super_lookup, file
dispatcher.cpp, line 228.
Sorry about that, this shouldn't happen. I will try to reduce this and
add it to our test suite.
Followed by a whole heap of warnings that seem to hard coded to
Laurent's machine
Program received signal: “SIGABRT”.
sharedlibrary apply-load-rules all
warning: Could not find object file "/Users/lrz/src/macruby-clean/
array.o" - no debug information available for "array.c".
warning: Could not find object file "/Users/lrz/src/macruby-clean/
bignum.o" - no debug information available for "bignum.c".
...
This occurs when I try to instantiate an NSWindowController
subclass. My Code:
def open_preferences(sender)
NSLog('open preferences')
preference_controller ||= PreferencesController.new
preference_controller.showWindow(self)
end
class PreferencesController < NSWindowController
def init
if (super initWithWindowNibName('preferences'))
self
else
nil
end
end
end
I have a .xib file called 'preferences.xib'
So can anyone spot something stupid? If not, how should I go about
debugging this?
I guess you tried to translate [super
initWithWindowNibName:@"preferences"] here. The problem is that super
in Ruby doesn't work exactly the same as in Objective-C. super in
Objective-C allows you to call any super method while in Ruby it will
always call the super version of the caller (here, init).
In your PreferencesController class, unless you overwrote
initWithWindowNibName:, you can simply call it without super.
class PreferencesController
def init
initWithWindowNibName('preferences')
end
end
As John wrote earlier, init should always return self (or nil if there
was an error). Here, initWithWindowNibName: is supposed to return self
or nil in case of an error, so we can simply return its return value.
Laurent
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