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iOS 基礎類解析 - 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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