Altsys Virtuoso 2.0K/virtuoso_20k.iso/NeXTanswers/OpenStepSpec_rtf/FoundationKit/Classes/NSMethodSignature.rtf

Text File | 1994-07-01 | 3.5 KB | 63 lines

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{\s1 \li100 \fi0 \ri1007 \ql   ClassName;}
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{\s4 \li7029 \fi-6552 \ri1007 \ql \tx6652 \tx7030   Description;}
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(Preliminary Documentation) Copyright \f3 \'e3\f1 1994 by NeXT Computer, Inc.  All Rights Reserved.\
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\fs36 NSMethodSignature \
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\fs28 \f0 \b \fs28 Inherits From:    \b0 \fs28 \f1 NSObject \
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\fs28 \s2 \fs16 \fs28 \f0 \b \fs28 Conforms To:    \b0 \fs28 \f1 NSCoding\
\fi0 NSObject  \
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\fs28 \s3 \fi-2771 \fs16 \fs28 \f0 \b \fs28 Declared In:    \b0 \fs28 \f1 foundation/NSMethodSignature.h \
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\fs28 Creating a Method Signature\
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\fs28 \pard \s4 \li7029 \fi-6552 \ri1007 \ql \tx6652 \tx7030 \f1 \b0 \fi-6552 + (NSMethodSignature *)\b signatureWithObjCTypes:\b0 (const char *)\i types\
\fi-6552 \s5 \li7030 \fi-6553 \fi-5796 \i0     Creates a method signature object given \i types\i0 , a string encoding the method return and argument types.  The characters of the encoding are accessible through the root class\'27s \b descriptionForInstanceMethod:\b0  or similar methods. \
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\fs28 Querying a Method Signature\
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\fs28 \pard \s4 \li7029 \fi-6552 \ri1007 \ql \tx6652 \tx7030 \f1 \b0 \fi-6552 {\f3 -} (NSArgumentInfo)\b argumentInfoAtIndex:\b0 (unsigned)\i index\
\fi-6552 \s5 \li7030 \fi-6553 \fi-5796 \i0     Returns information about the argument at \i index\i0 .  Indices begin with 0.  The \'aahidden\'ba arguments \b self\b0  and \b _cmd\b0  are indexed at 0 and 1; method-specific arguments begin at index 2.  If \i index\i0  is too large for the actual number of arguments, a NSInvalidArgumentException exception is raised.\
\s4 \li7029 \fi-5794 \fi-6552 \fi-6552 {\f3 -} (unsigned)\b frameLength\b0     Returns the number of bytes that the arguments, taken together, would occupy on the stack. \
\fi-6552 \fi-6552 \fi-6552 {\f3 -} (BOOL)\b isOneway\b0     Returns YES if the method is asynchronous (that is, it returns without waiting for the receiver to finish processing it), and NO otherwise.\
\fi-6552 \fi-6552 \fi-6552 {\f3 -} (unsigned)\b methodReturnLength\b0     Returns the number of bytes required by the return value.\
\fi-6552 \fi-6552 \fi-6552 {\f3 -} (char *)\b methodReturnType\b0     Returns a string encoding the return type of the method.   (What the characters in the string represent is usually defined by some implementation-dependent runtime types.)\
\fi-6552 \fi-6552 \fi-6552 {\f3 -} (unsigned)\b numberOfArguments\b0     Returns the number of arguments recorded  in the receiver.  This will be at least two, since it includes the \'aahidden\'ba arguments, \b self\b0  and \b _cmd\b0 , which are the first two arguments passed to every method implementation.\
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