Enumeration in Swift language automatically receive the same access level for individual
cases of an enumeration. Consider for example to access the students name and marks
secured in three subjects enumeration name is declared as student and the members
present in enum class are name which belongs to string datatype, marks are represented
as mark1, mark2 and mark3 of datatype Integer. To access either the student name or
marks they have scored. Now, the switch case will print student name if that case block is
executed otherwise it will print the marks secured by the student. If both condition fails
the default block will be executed.
Access Control for SubClasses
Swift allows the user to subclass any class that can be accessed in the current access
context. A subclass cannot have a higher access level than its superclass. The user is
restricted from writing a public subclass of an internal superclass.
public class cricket {
private func print() {
println("Welcome to Swift Super Class")
}
}internal class tennis: cricket {
override internal func print() {
println("Welcome to Swift Sub Class")
}
}let cricinstance = cricket()
cricinstance.print()let tennisinstance = tennis()
tennisinstance.print()When we run the above program using playground, we get the following result:
Welcome to Swift Super Class
Welcome to Swift Sub ClassAccess Control for Constants, variables, properties and subscripts
Swift constant, variable, or property cannot be defined as public than its type. It is not
valid to write a public property with a private type. Similarly, a subscript cannot be more
public than its index or return type.