[Pyobjc-dev] kvc instance variables
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[Pyobjc-dev] kvc instance variables
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From: Chris M. <pyo...@mc...> - 2007-11-11 20:23:33
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I'm going through chapter six now, and I'm running into issues with
key value coding instance variables and how to create them. Using both
approaches in the documentation I can't seem to find a way to create a
NSString instance variable. I understand that I could just do
myvar=NSString.new() or myvar=objc.ivar('myvar') and not give it the
type, but neither of those seem to give me a full KVC instance
variable of a certain type.
From the NEWS.txt:
- It is now conveniently possible to create instance variables with
a specific type (e.g. without manually making up a encoded type
string)::
class MyObject (NSObject):
bounds = objc.ivar.NSRect()
done = objc.ivar.bool()
From simple-kvo.py:
class MyClass(NSObject):
base = objc.ivar("base", objc._C_INT)
power = objc.ivar("power", objc._C_INT)
I'm looking to implement an instance variable of type NSString, but
objc.ivar.NSString and objc._NSString do not exist for either approach.
objc.ivar.NSRect and objc._C_INT appear as utilized above, but
NSString seems to be missing.
If you only import objc, you get just the basic types:
In [1]: import objc
In [2]: objc.ivar. #hit tab
objc.ivar.__base__ objc.ivar.__bases__
objc.ivar.__basicsize__ objc.ivar.__call__
objc.ivar.__class__ objc.ivar.__class__
objc.ivar.__class__ objc.ivar.__class__
objc.ivar.__cmp__ objc.ivar.__delattr__
objc.ivar.__delattr__ objc.ivar.__delattr__
objc.ivar.__delete__ objc.ivar.__dict__
objc.ivar.__dictoffset__ objc.ivar.__doc__
objc.ivar.__doc__ objc.ivar.__doc__
objc.ivar.__flags__ objc.ivar.__get__
objc.ivar.__getattribute__ objc.ivar.__getattribute__
objc.ivar.__getattribute__ objc.ivar.__hash__
objc.ivar.__hash__ objc.ivar.__hash__
objc.ivar.__init__ objc.ivar.__init__
objc.ivar.__init__ objc.ivar.__itemsize__
objc.ivar.__module__ objc.ivar.__mro__
objc.ivar.__name__ objc.ivar.__new__
objc.ivar.__new__ objc.ivar.__new__
objc.ivar.__reduce__ objc.ivar.__reduce__
objc.ivar.__reduce__ objc.ivar.__reduce_ex__
objc.ivar.__reduce_ex__ objc.ivar.__reduce_ex__
objc.ivar.__repr__ objc.ivar.__repr__
objc.ivar.__repr__ objc.ivar.__set__
objc.ivar.__setattr__ objc.ivar.__setattr__
objc.ivar.__setattr__ objc.ivar.__str__
objc.ivar.__str__ objc.ivar.__subclasses__
objc.ivar.__weakrefoffset__ objc.ivar.bool
objc.ivar.char objc.ivar.double
objc.ivar.float objc.ivar.int
objc.ivar.long objc.ivar.long_long
objc.ivar.mro objc.ivar.short
objc.ivar.unsigned_char objc.ivar.unsigned_int
objc.ivar.unsigned_long objc.ivar.unsigned_long_long
objc.ivar.unsigned_short objc.ivar.__str__
Import Foundation and you get some more... but no NSString! Is there
something else I need to import?
In [2]: import Foundation
In [3]: objc.ivar. #hit tab
Display all 121 possibilities? (y or n)
objc.ivar.__base__
objc.ivar.__bases__
objc.ivar.__basicsize__ objc.ivar.__call__
objc.ivar.__class__
objc.ivar.__class__
objc.ivar.__class__ objc.ivar.__class__
objc.ivar.__cmp__
objc.ivar.__delattr__
objc.ivar.__delattr__ objc.ivar.__delattr__
objc.ivar.__delete__
objc.ivar.__dict__
objc.ivar.__dictoffset__ objc.ivar.__doc__
objc.ivar.__doc__
objc.ivar.__doc__
objc.ivar.__flags__ objc.ivar.__get__
objc.ivar.__getattribute__
objc.ivar.__getattribute__
objc.ivar.__getattribute__ objc.ivar.__hash__
objc.ivar.__hash__
objc.ivar.__hash__
objc.ivar.__init__ objc.ivar.__init__
objc.ivar.__init__
objc.ivar.__itemsize__
objc.ivar.__module__ objc.ivar.__mro__
objc.ivar.__name__
objc.ivar.__new__
objc.ivar.__new__ objc.ivar.__new__
objc.ivar.__reduce__
objc.ivar.__reduce__
objc.ivar.__reduce__ objc.ivar.__reduce_ex__
objc.ivar.__reduce_ex__
objc.ivar.__reduce_ex__
objc.ivar.__repr__ objc.ivar.__repr__
objc.ivar.__repr__
objc.ivar.__set__
objc.ivar.__setattr__ objc.ivar.__setattr__
objc.ivar.__setattr__
objc.ivar.__str__
objc.ivar.__str__ objc.ivar.__subclasses__
objc.ivar.__weakrefoffset__
objc.ivar.bool
objc.ivar.CFAllocatorContext objc.ivar.CFArrayCallBacks
objc.ivar.CFBagCallBacks
objc.ivar.CFBinaryHeapCallBacks
objc.ivar.CFBinaryHeapCompareContext
objc.ivar.CFDictionaryKeyCallBacks
objc.ivar.CFDictionaryValueCallBacks
objc.ivar.CFFileDescriptorContext
objc.ivar.CFGregorianDate objc.ivar.CFGregorianUnits
objc.ivar.CFMachPortContext
objc.ivar.CFMessagePortContext
objc.ivar.CFRange
objc.ivar.CFRunLoopObserverContext
objc.ivar.CFRunLoopSourceContext
objc.ivar.CFRunLoopTimerContext
objc.ivar.CFSetCallBacks objc.ivar.CFSocketContext
objc.ivar.CFSocketSignature
objc.ivar.CFStreamClientContext
objc.ivar.CFStreamError
objc.ivar.CFStringInlineBuffer
objc.ivar.CFSwappedFloat32
objc.ivar.CFSwappedFloat64
objc.ivar.CFTreeContext objc.ivar.CFUUIDBytes
objc.ivar.CFXMLAttributeDeclarationInfo
objc.ivar.CFXMLAttributeListDeclarationInfo
objc.ivar.CFXMLDocumentInfo
objc.ivar.CFXMLDocumentTypeInfo
objc.ivar.CFXMLElementInfo
objc.ivar.CFXMLElementTypeDeclarationInfo
objc.ivar.CFXMLEntityInfo
objc.ivar.CFXMLEntityReferenceInfo
objc.ivar.CFXMLExternalID
objc.ivar.CFXMLNotationInfo
objc.ivar.CFXMLParserCallBacks
objc.ivar.CFXMLParserContext
objc.ivar.CFXMLProcessingInstructionInfo
objc.ivar.char
objc.ivar.double objc.ivar.float
objc.ivar.int
objc.ivar.long
objc.ivar.long_long objc.ivar.mro
objc.ivar.NSAffineTransformStruct
objc.ivar.NSDecimal
objc.ivar.NSFastEnumerationState objc.ivar.NSHashEnumerator
objc.ivar.NSHashTableCallBacks
objc.ivar.NSMapEnumerator
objc.ivar.NSMapTableKeyCallBacks
objc.ivar.NSMapTableValueCallBacks
objc.ivar.NSPoint
objc.ivar.NSRange
objc.ivar.NSRect objc.ivar.NSSize
objc.ivar.NSSwappedDouble
objc.ivar.NSSwappedFloat
objc.ivar.short objc.ivar.unsigned_char
objc.ivar.unsigned_int
objc.ivar.unsigned_long
objc.ivar.unsigned_long_long objc.ivar.unsigned_short
objc.ivar.__str__
In [4]: objc.ivar.NSString
---------------------------------------------------------------------------
AttributeError Traceback (most recent call
last)
/Volumes/Raid/mcclimans/Src/pyobjc-20x-branch/<ipython console> in
<module>()
AttributeError: type object 'ivar' has no attribute 'NSString'
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