Reputation: 2199
In order to be a bit more clear I am looking for a solution for the user to pass a class with a specific subclass and protocol, i.e. a class that inherits a viewController and delegate protocol. I know its possible to create a protocol list but cannot find a solution that works correctly. Currently I use a initializer and use the viewcontroller as a parameter and check for delegate inside the function but I would rather if I can have these types in the parameter instead.
EDIT: Looking to do something similar to this
Protocol prot:Delegate{}
class cla:ViewController{}
class impl{
init(mainUI: cla, prot){
do things
}
}
That way back in the main view controller I can do something like this
class viewController: cla, prot{
var view:impl
override func loadView() {
//Attach to Screen
view = impl(mainUI: self);
}
}
Their is a bit more happening but that's the only part thats really relevant. Currently I use a initializer to just fail if the class doesn't inherit the correct protocols
Upvotes: 0
Views: 144
Reputation: 8718
You're asking the wrong question. In other words trying to shoe-horn in a serious design mistake.
A view should not know that its delegate is a UIViewController or a subclass.
A delegate should be any class that obeys (adopts) a specific delegate protocol.
A view should only delegate specific responsibilities. Each of those responsibilities must be described by a protocol method or property.
If you explain what your issue is in more detail (why you think you need direct access to the entire definition of a UIViewController
within a UIView
), we can help you avoid this mistake.
Upvotes: 1
Reputation: 1235
You could create a dummy type that represents your requirements. A typealias doesn't work in this case, but this might:
class DummyClass: MyViewController, MyDelegateProtocol {}
func needsRequiredClass(input: DummyClass) {...}
With MyViewController
and MyDelegateProtocol
being the superclass and delegate you mentioned. The DummyClass
would have an empty implementation.
Then, make your specific classes sub classes of DummyClass
:
class TestClass: DummyClass {...}
And you can pass in that new class:
let test = TestClass()
self.needsRequiredClass(test)
Upvotes: 2