Blocks are blocking my view

Question

suppose I do this:

MyClass *vista = [[MyClass alloc] initWithFrame:CGRectZero];

vista.onFinish = ^{
    CGRect rect = vista.bounds;
    // bla bla bla
};

then xcode will award me with this error: capturing vista strongly in this block is likely to lead to a retain cycle

Someone suggested declaring vista like this

__unsafe_unretained MyClass *vista = [[MyClass alloc] initWithFrame:CGRectZero];

but the problem is this. vista variable is assigned to a property a few lines down.

self.myVista = vista;

and this is a nonatomic, strong property.

How do I solve that? I can declare a temporary id var to use that, but this appears to be a lame solution.

Any thought?

But creating a weak reference and using that inside the block should solve the problem. — Martin R, Apr 10 '13 at 19:44

score 2 · Accepted Answer · answered Apr 10 '13 at 19:46

2

Try this:

MyClass *vista = [[MyClass alloc] initWithFrame:CGRectZero];

__weak MyClass *weakVista = vista;    
vista.onFinish = ^{
    CGRect rect = weakVista.bounds;
    // bla bla bla
};

answered Apr 10 '13 at 19:46

rmaddy

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Blocks are blocking my view

1 Answers1