How do I use CFArrayRef in Swift?

Question

I\'m using an Objective-C class in my Swift project via a bridging header. The method signature looks something like this:

- (CFArrayRef)someMethod:(someType         


        

Answer 1

As explained in Working with Core Foundation Types, there are two possible solutions when you return a Core Foundation object from your own function that is imported in Swift:

• Annotate the function with CF_RETURNS_RETAINED or CF_RETURNS_NOT_RETAINED. In your case:

  - (CFArrayRef)someMethod:(someType)someParameter CF_RETURNS_NOT_RETAINED;
  

• Or convert the unmanaged object to a memory managed object with takeUnretainedValue() or takeRetainedValue() in Swift. In your case:

  var cfArr = myInstance.someMethod(someValue).takeUnretainedValue()