O'Reilly logo

Cocoa in a Nutshell by James Duncan Davidson, Michael Beam

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Name

NSNumber — Mac OS X 10.0

Synopsis

NSNumber is a wrapper class for the C primitive numeric data types. Using this class, clients can store values of primitive data types, such as int and float, in Cocoa collection classes such as NSArray or NSDictionary, which only handle Objective-C objects.

image with no caption

@interface NSNumber : NSValue
                                  // Convenience Constructors
   + (NSNumber *)numberWithBool:(BOOL)value;
   + (NSNumber *)numberWithChar:(char)value;
   + (NSNumber *)numberWithDouble:(double)value;
   + (NSNumber *)numberWithFloat:(float)value;
   + (NSNumber *)numberWithInt:(int)value;
   + (NSNumber *)numberWithLong:(long)value;
   + (NSNumber *)numberWithLongLong:(long long)value;
   + (NSNumber *)numberWithShort:(short)value;
   + (NSNumber *)numberWithUnsignedChar:(unsigned char)value;
   + (NSNumber *)numberWithUnsignedInt:(unsigned int)value;
   + (NSNumber *)numberWithUnsignedLong:(unsigned long)value;
   + (NSNumber *)numberWithUnsignedLongLong:(unsigned long long)value;
   + (NSNumber *)numberWithUnsignedShort:(unsigned short)value;
                                  // Initializers
   - (id)initWithBool:(BOOL)value;
   - (id)initWithChar:(char)value;
   - (id)initWithDouble:(double)value;
   - (id)initWithFloat:(float)value;
   - (id)initWithInt:(int)value;
   - (id)initWithLong:(long)value;
   - (id)initWithLongLong:(long long)value;
   - (id)initWithShort:(short)value;
   - (id)initWithUnsignedChar:(unsigned char)value;

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required