On Mar 15, 2010, at 4:32 PM, Rick Mann wrote:
> Instead of passing my operation a target and selector, is there any way I can
> just pass it a block, but then have it execute that block on the main thread?
Note that the methods listed so far will cause a deadlock if called from the
main thread.
For the non-parameters form I use the below as a category on NSObject, should
be trivial to add arguments.
Gerd
- (void)runOnMainQueue:(void (^)(void))aBlock {
//
// Execute *aBlock* on the main queue/thread.
//
// # Parameters
// aBlock
// : The block to be executed.
//
// # Discussion
// When called from the main queue the block is executed immediately.
// Otherwise the block will be scheduled for execution on the main
queue,
// the method will return after the block was executed.
//
if(dispatch_get_current_queue()==dispatch_get_main_queue())
{
aBlock();
}
else
{
dispatch_sync(dispatch_get_main_queue(),aBlock);
}
}
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