CODEWITHSUNDEEP
genericsswift
aryaxt
aryaxt

Reputation: 77596

Swift - Generic methods

In java you could have a generic method similar to below, where the type is explicitly specified and passed to the method as an argument. Is this possible with swift?

public T fetchObject(Class<T> clazz, int id) {
   // My table name is the same as class name
   // So based on the generic type passed to method I want to fetch that record.
}

User user = fetchObject(User.class, 5);

What I'm trying to achieve

public func fetchObject (id: Int /* Somehow pass the type */) -> T? {
   // I need a way to know what class type has to be used with this generic method
   // Create NSEntityDescription based on the generic class passed
   // managedObjectContext getExistingObjectById
}

Upvotes: 15

Views: 7113

Answers (1)

aryaxt
aryaxt

Reputation: 77596

T.Type is what I had to use, even better than how java handles this

public func fetchObject<T> (id: Int, type: T.Type) -> T? {

}

Usage

var myClass = fetchObject(5, MyClass.self)

Upvotes: 20

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