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iosobjective-cblock

Confused by use of = in block

void (^configureCell)(PhotoCell*, Photo*) = ^(PhotoCell* cell, Photo* photo) {
    cell.label.text = photo.name;
};

I never have seen before the "=" sign in a block, how does is work?

Thanks!

Solution

  • It's a block declaration which is assigned to the configureCell variable.

    This is block variable definition (like i.e. NSArray *array):

    void (^configureCell)(PhotoCell *, Photo *)

    This is block definition:

    ^(PhotoCell* cell, Photo* photo) {...}

    You can use this block like this:

    PhotoCell *cell = [PhotoCell ...];
Photo *photo = [Photo ...];

// Execute block
configureCell(cell, photo);