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NSNull Class Reference

Overview

The NSNull class defines a singleton object used to represent null values in collection objects (which don’t allow nil values).

Adopted Protocols

• – encodeWithCoder:

• – initWithCoder:

• – copyWithZone:

Tasks

Obtaining an Instance

• + null

Class Methods

null

Returns the singleton instance of NSNull.

+ (NSNull *)null

Return Value

The singleton instance of NSNull.

Availability

• Available in Mac OS X v10.0 and later.

Declared In

NSNull.h

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