Before ARC I had the following code that retains the delegate while an async operation is in progress:
- (void)startAsyncWork
{
[_delegate retain];
// calls executeAsyncWork asynchronously
}
- (void)executeAsyncWork
{
// when finished, calls stopAsyncWork
}
- (void)stopAsyncWork
{
[_delegate release];
}
What is the equivalent to this pattern with ARC?
Why not just assign your delegate object to a strong ivar for the duration of the asynchronous task?
Or have a local variable in executeAsyncWork
- (void)executeAsyncWork
{
id localCopy = _delegate;
if (localCopy != nil) // since this method is async, the delegate might have gone
{
// do work on local copy
}
}