Background checking

[luismarques]

Clicking "Check Now" blocks the user interface (menu icon) for a few seconds.
The checking process should be done in a background thread or equivalent mechanism (GCD task, etc), so that clicking the icon is possible during the update process.

[hiroshi]

I have a plan to solve this issue using NSThread (because GCD is only for Snow Leoprad and this is not a multi core performance issue).

[btennant]

Consider using NSOperation if possible as it will leverage GCD where possible and is compatible on both Leopard and Snow Leopard.

[hiroshi]

Thanks for mentioning NSOperation. I didn't know that new API since 10.5.

[btennant]

No problem NSOperation works in conjunction with NSOperationQueue. It's a very nice abstraction for threading. I use it heavily in iPhone dev.

[btennant]

I don't know why I didn't mention this before but what about simply using performSelectorInBackground: ?