Protocol: NSFastEnumeration

Overview

The fast enumeration protocol NSFastEnumeration must be adopted and implemented by objects used in conjunction with the for language construct used in conjunction with Cocoa objects.Returns by reference a C array of objects over which the sender should iterate, and as the return value the number of objects in the array. (required)This defines the structure used as contextual information in the NSFastEnumeration protocol.

Instance Method Summary (collapse)

Instance Method Details

- (Integer) countByEnumeratingWithState(state, objects:stackbuf, count:len)

Returns by reference a C array of objects over which the sender should iterate, and as the return value the number of objects in the array. (required) The state structure is assumed to be of stack local memory, so you can recast the passed in state structure to one more suitable for your iteration.

Parameters:

  • state (NSFastEnumerationState) —

    Context information that is used in the enumeration to, in addition to other possibilities, ensure that the collection has not been mutated.

  • stackbuf (Object) —

    A C array of objects over which the sender is to iterate.

  • len (Integer) —

    The maximum number of objects to return in stackbuf.

Returns:

  • (Integer) —

    The number of objects returned in stackbuf. Returns 0 when the iteration is finished.