This SO post explains pretty well how to solve the issue of creating a delegate that is weak.
Essentially, there are 2 approaches:
Using the @objc keyword:
@objc protocol MyClassDelegate {
}
class MyClass {
weak var delegate: MyClassDelegate?
}
Using the :class keyword:
protocol MyClassDelegate: class {
}
class MyClass {
weak var delegate: MyClassDelegate?
}
I am trying to do some research to understand what exactly the differences between the two approaches are. The docs are pretty clear about using @objc:
To be accessible and usable in Objective-C, a Swift class must be a descendant of an Objective-C class or it must be marked
@objc.
However, nowhere I found some information about what :class actually does. Considering the whole notion in detail, it actually doesn't make a lot of sense to. My understanding is that class is a keyword in Swift to declare classes. So, here it seems like we are using the keyword class itself as a protocol (as we're appending it after the : after the protocol declaration).
So, why does this even work syntactically and what exactly does it do?
