I retrofitted an alert view and an action sheet into the Still project.
This is the alert view
that would have been displayed if there was no source from which to pick an image.
An alert view displays a message.
When the user presses OK, it disappears.
This is the action sheet
that is displayed when there are sources from which to pick an image.
An action sheet asks the user to make a choice,
and then it disappears.
view is displayed modally (temporarily)
by calling the first view controller’s method
which we saw in
This method cannot be called in the first view controller’s
methods (but it can be called in
It can only be called after the first view controller’s view is
displayed in the