What is the difference between isHittable and exists?

Question

iOS

Good afternoon!
I am writing UI tests for iOS and then I ran into a question, what is the difference between exists and isHittable?
I read the following inscription on isHittable: Whether or not a hit point can be computed for the element for the purpose of synthesizing events.
But still didn't understand what it meant.
Thank you in advance!
Regards, Ivan.

Answer 1

everything is clear from the names themselves:
exists - whether the element exists.
isHittable - whether it is possible to interact with the element (respond to click/touch/gesture).
for example, we display a table of 50 rows. those cells that are visible on the screen are both exists and hittable . a those that don't fit on the screen have exists , but not hittable .
I think it will be clear:

if (dateTextField.exists) {
    NSLog(@"date field exists");
}
if (dateTextField.hittable) {
    NSLog(@"date field action is possible");
}