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paperh18648 margl-907 margr0 margt0 margb0 fi0 ri0 ql sb0 f1 fs24 Copyright f3 'e3f1 1994 by NeXT Computer, Inc. All Rights Reserved.
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fs36 NSProxy
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fs28 f0 b fs24 Inherits From:tab b0 fs28 f1 none (i NXProxy is a root classi0 )
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fs28 s6 f0 b fs24 Conforms To:tab b0 fs28 f1 NSObject
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fs28 s7 f0 b fs24 Declared In:tab b0 fs28 f1 Foundation/NSProxy
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fs28 Class Description
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fs28 The NSProxy class declares the programmatic interface to i proxiesi0 'd0objects that stand in for real objects (usually descendants of the NSObject class), where the real objects may exist within the same or another process, perhaps even in a system of a different architecture across a network. To the application, the proxy behaves like the real object, though the real object may not be directly accessible, and in general, instance variables of remote objects are not accessible.
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fs28 NSProxy class defines few methods, because proxies respond to few messages directly. Instead, when a proxy receives a message it doesn'27t respond to, it encodes the message, including the arguments, in an invocation, and invokes b forwardInvocation:b0 . Specialized subclasses then direct further processing, such as forwarding the message to a real object in the same or another process.
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fs28 Methods defined in this class are methods that the NSProxy class responds to directly. Unless otherwise noted, none of these methods are forwarded to the proxy'27s correspondent.
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fs28 Your application in general doesn'27t instantiate NSProxy objects'd0they'27re created as instances of specialized subclasses. Proxies are reference-counted so that only a single NSProxy per connection is instantiated for any real object.
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fs28 Creating and Destroying Instancestab
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fs28 fi-6552 + (id)b allocb0 tab Returns a new, uninitialized instance of the receiving class.
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fs28 fi-6552 + (id)b allocWithZone:b0 (NSZone *)i zonei0 tab Returns a new, uninitialized instance of the receiving class in i zonei0 .
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fs28 fi-6552 {f3 -} (void)b deallocb0 tab Deallocates the memory occupied by the receiver.
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fs28 Identifying Classestab
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fs28 fi-6552 + (Class)b classb0 tab Returns b selfb0 . Since this is a class method, it returns the class object.
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fs28 Obtaining Method Information
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fs28 fi-6552 {f3 -} (NSMethodSignature *)b methodSignatureForSelector:b0 (SEL)i aSelector
s9 li7030 fi-6553 fi-5796 i0 tab Implemented by subclasses to return an object that contains a description of the i aSelectori0 method, or b nilb0 if the i aSelectori0 method can'27t be found. The NSProxy implementation of this method raises an NSInvalidArgumentException exception.
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fs28 Describing Objects
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fs28 fi-6552 {f3 -} (NSString *)b descriptionb0 tab Prints the name of receiver'27s class and the hexadecimal value of the its b idb0 .
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fs28 Forwarding Messages
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fs28 fi-6552 {f3 -} (void)b forwardInvocation:b0 (NSInvocation *)i invocation
s9 li7030 fi-6553 fi-5796 i0 tab Implemented by subclasses to forward messages to other objects. The NSProxy implementation of this method raises an NSInvalidArgumentException exception.
}These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.