[MacRuby-devel] NSTimer

[Matt Aimonetti]

The "NSTimer.scheduledTimerWithTimeInterval_target_selector_userInfo_repeats"syntax
is the RubyCocoa syntax, you need to use the selector approach in MacRuby,
very much like obj-C.

If you are on 0.5 beta or a recent nightly build, you should get a
traceback, otherwise, you can still try to catch the exception and print out
the error message and backtrace:

begin
  raise "this is a test"
rescue Exception => e
  raise "#{e.message} #{e.backtrace}"
end

- Matt



On Sun, Oct 11, 2009 at 11:45 AM, Robert Rice <rice.audio at pobox.com> wrote:

> Thanks John::
> I wasn't familiar with this new syntax. I was using the old syntax
> "NSTimer.scheduledTimerWithTimeInterval_target_selector_userInfo_repeats"
> but I see it doesn't work in MacRuby.
>
> MarRuby is giving me error messages without a traceback. Is there a way to
> enable tracebacks?
>
> Bob Rice
>
> On Oct 11, 2009, at 12:58 PM, John Shea wrote:
>
> Hi Bob,
> (you are going to kick yourself) you have misplaced the colon between
> target and self  - there is a comma there, and the colon has been placed in
> front of "target", so the method is not being recognised.
>
> eg:
>     @synchro_timer = NSTimer.scheduledTimerWithTimeInterval(TIME_INTERVAL,
> target:self, selector:"synchronise_with_server:", userInfo:nil,
> repeats:true)
>
>
> as for threads - maybe someone else could chime in with a preference - but
> I do it the Cocoa way (eg http Connection delegates or timers) - but for
> data crunching using all cores I will use something like Laurent's barber
> shop code: http://www.macruby.org/blog/2009/10/07/macruby05b1.html.
>
>
> J
>
> On Oct 11, 2009, at 6:19 PM, Robert Rice wrote:
>
> Congratulations MacRuby Development Team:
> My application almost runs now in MacRuby.
>
> Is NSTimer class supported in MacRuby?
>
> I was doing background processing using NSTimer as follows:
>
> @timer = NSTimer.scheduledTimerWithTimeInterval( 5.0, :target, self,
> :selector, :periodicUpdate, :userInfo, nil, :repeats, true )
>
> but this now gives me the error:
>
> *undefined method `scheduledTimerWithTimeInterval' for NSTimer:Class
> (NoMethodError)*
> *
> *
> *Do you have a preferred method for doing backgound tasks in MacRuby -
> perhaps separate threads?
>
> Thanks,
> Bob Rice
>
> *
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