Modal View Controller, what is it and what is it eaten with?

Question

Objective-C

Links, examples, etc. Google did not give anything good. The simpler the explanation, the better.

Answer 1

It is needed in order to throw it on top of the current ViewController. When showing a modal controller, you do not need to shove it into navigation or somewhere else (this is especially convenient when there is no nivagation controller)
On the example of the ipad, it is very clearly visible (everything remains in the background and has not disappeared anywhere) https://developer.apple.com/ library/ios/featuredar...
You can draw a rough analogy with several windows of one program in Windows. You open the settings, for example, and you have a second window of the same program, but most likely smaller in size, while the first one is blocked

Answer 2

Only not modal, but model.
No need to search in the context of Apple programming.
Wikipedia has a great article with an example.