On Aug 24, 2009, at 9:14 AM, Nikhil Khandelwal wrote:
In my application, I am running a process for copying files from one
location to another. In this I select number of files from panel and
then showing a progress bar which shows progress of copying. In this
window I have a cancel button to cancel the copying process but
clicking on the cancel button does not call the IBAction until the
whole process of copying the file completes.
Any one faced same problem ?
You're doing your work in the main run loop (where all UI stuff is
handled). The main run loop is blocked until your work completes and
the run loop is ready to handle a new event (the button click).
Move your work to a separate thread (if on Leopard, try
NSOperation / NSOperationQueue). That way your UI is free to respond
to the cancel button (which in turn tells the queue to cancel all
pending tasks).
--
I.S.
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