Retain cycle on `self` with blocks
- by Jonathan Sterling
I'm afraid this question is pretty basic, but I think it's relevant to a lot of Objective-C programmers who are getting into blocks.
What I've heard is that since blocks capture local variables referenced within them as const copies, using self within a block can result in a retain cycle, should that block be copied. So, we are supposed to use __block to force the block to deal directly with self instead of having it copied.
__block typeof(self) bself = self;
[someObject messageWithBlock:^{ [bself doSomething]; }];
instead of just
[someObject messageWithBlock:^{ [self doSomething]; }];
What I'd like to know is the following: if this is true, is there a way that I can avoid the ugliness (aside from using GC)?
