mownier

There's no such thing as of now. You may filter the photo in a photo-editing app and then, select it when posting.

add some layout constraints for centering the view

See example [here](https://github.com/mownier/MONActivityIndicatorView/blob/master/MONActivityIndicatorViewDemo/MONActivityIndicatorViewDemo/Source/Controllers/MONViewController.m) on placing the indicator at the center of a certain view.