zwaldowski/BlocksKit — pull request #254 by muratayusuke (2014-08-25 09:47:42+00:00)
Title: Implement category for UIImage to use UIImageWriteToSavedPhotosAlbum wit...

`UIImageWriteToSavedPhotosAlbum()` requires following params.

```
void UIImageWriteToSavedPhotosAlbum (
UIImage *image,
id completionTarget,
SEL completionSelector,
void *contextInfo
);
```

So I implemented `bk_writeToSavedPhotosAlbumWithBlock` as a category of `UIImage` to pass block instead of `completionSelector`.