iOS 基础类解析 - NSNumber

iOS 基础类解析 - NSNumber

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NSNumber Class Reference

Inherits from	NSValue : NSObject
Conforms to	NSCopying (NSValue) NSSecureCoding (NSValue) NSObject (NSObject)
Framework	/System/Library/Frameworks/Foundation.framework
Availability	Available in iOS 2.0 and later.
Declared in	NSDecimalNumber.h NSValue.h
Companion guides	Number and Value Programming Topics Property List Programming Guide
Related sample code	Advanced UISearchBar CryptoExercise ListAdder RosyWriter TheElements

Creating an NSNumber Object

• + numberWithBool:
• + numberWithChar:
• + numberWithDouble:
• + numberWithFloat:
• + numberWithInt:
• + numberWithInteger:
• + numberWithLong:
• + numberWithLongLong:
• + numberWithShort:
• + numberWithUnsignedChar:
• + numberWithUnsignedInt:
• + numberWithUnsignedInteger:
• + numberWithUnsignedLong:
• + numberWithUnsignedLongLong:
• + numberWithUnsignedShort:

Initializing an NSNumber Object

• – initWithBool:
• – initWithChar:
• – initWithDouble:
• – initWithFloat:
• – initWithInt:
• – initWithInteger:
• – initWithLong:
• – initWithLongLong:
• – initWithShort:
• – initWithUnsignedChar:
• – initWithUnsignedInt:
• – initWithUnsignedInteger:
• – initWithUnsignedLong:
• – initWithUnsignedLongLong:
• – initWithUnsignedShort:

Accessing Numeric Values

• – boolValue
• – charValue
• – decimalValue
• – doubleValue
• – floatValue
• – intValue
• – integerValue
• – longLongValue
• – longValue
• – shortValue
• – unsignedCharValue
• – unsignedIntegerValue
• – unsignedIntValue
• – unsignedLongLongValue
• – unsignedLongValue
• – unsignedShortValue

Retrieving String Representations

• – descriptionWithLocale:
• – stringValue

Comparing NSNumber Objects

• – compare:
• – isEqualToNumber:

Accessing Type Information

• – objCType

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