Recursive Block Retain Cycles

Question

Will this lead to any sort of retain cycle? Is it safe to use?

__block void (^myBlock)(int) = [^void (int i)
{
    if (i == 0)
        return;

    NSLog(@\"         


        

Answer 1

Here is a modern solution to the problem:

void (^myBlock)();
__block __weak typeof(myBlock) weakMyBlock;
weakMyBlock = myBlock = ^void(int i) {
    void (^strongMyBlock)() = weakMyBlock; // prevents the block being delloced after this line. If we were only using it on the first line then we could just use the weakMyBlock.
    if (i == 0)
        return;

    NSLog(@"%d", i);
    strongMyBlock(i - 1);
};
myBlock(10);