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<head>
<title>NSInvocation class reference</title>
</head>
<body>
<font face="serif">
<a href="Base.html">Up</a>
<br />
<h1><a name="title$NSInvocation">NSInvocation class reference</a></h1>
<h3>Authors</h3>
<dl>
<dt>Richard Frith-Macdonald (<a href="mailto:richard@brainstorm.co.uk"><code>richard@brainstorm.co.uk</code></a>)</dt>
<dd>
</dd>
<dt>Andrew Kachites McCallum (<a href="mailto:mccallum@gnu.ai.mit.edu"><code>mccallum@gnu.ai.mit.edu</code></a>)</dt>
<dd>
</dd>
</dl>
<p><b>Copyright:</b> (C) 1998,2003 Free Software Foundation, Inc.</p>
<div>
<hr width="50%" align="left" />
<h3>Contents -</h3>
<ol>
<li>
<a href="#001000000000">Software documentation for the NSInvocation class</a>
</li>
<li>
<a href="#002000000000">Software documentation for the NSInvocation(GNUstep)
category</a>
</li>
<li>
<a href="#003000000000">Software documentation for the
NSInvocation(MacroSetup) category</a>
</li>
</ol>
<hr width="50%" align="left" />
</div>
<h1><a name="001000000000">
Software documentation for the NSInvocation class
</a></h1>
<h2><a name="class$NSInvocation">NSInvocation</a> : <a rel="gsdoc" href="NSObject.html#class$NSObject">NSObject</a></h2>
<blockquote class="declared">
<dl>
<dt><b>Declared in:</b></dt>
<dd>Foundation/NSInvocation.h</dd>
</dl>
</blockquote>
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
</p>
<p>
The <code>NSInvocation</code> class implements a
mechanism of constructing messages (as
<code>NSInvocation</code> instances), sending these
to other objects, and handling the returned values.
</p>
<p>
</p>
<p>
An <code>NSInvocation</code> object may contain a target
object to which a message can be sent, or may send
the message to an arbitrary object. <br /> Each message
consists of a selector for that method and an
argument list. Once the message has been sent, the
invocation will contain a return value whose
contents may be copied out of it.
</p>
<p>
</p>
<p>
The target, selector, and arguments of an instance be
constructed dynamically, providing a great deal
of power/flexibility.
</p>
<p>
</p>
<p>
The sending of the message to the target object (using
the <a rel="gsdoc" href="#method$NSInvocation-invoke">-invoke</a>
or
<a rel="gsdoc" href="#method$NSInvocation-invokeWithTarget$">
-invokeWithTarget:
</a>
method) can be done at any time, but a standard use
of this is by the
<a rel="gsdoc" href="NSObject.html#method$NSObject-forwardInvocation$">[NSObject -forwardInvocation:]</a>
method which is called whenever a method is not implemented by the class of the object to which it was sent.
</p>
<p>
</p>
<p>
Related to the class are two convenience macros...
<a rel="gsdoc" href="Functions.html#macro$NS_MESSAGE">
NS_MESSAGE()
</a>
and
<a rel="gsdoc" href="Functions.html#macro$NS_INVOCATION">
NS_INVOCATION()
</a>
... to allow easy construction of invocations with all
the arguments set up.
</p>
<p>
</div>
<hr width="50%" align="left" />
<a href="#_NSInvocation_ivars">Instance Variables</a>
<br/><br/>
<b>Method summary</b>
<ul>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation(GNUstep)-sendsToSuper">-sendsToSuper</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation(GNUstep)-setSendsToSuper$">-setSendsToSuper:</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation(MacroSetup)+_newProxyForInvocation$">+_newProxyForInvocation:</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation(MacroSetup)+_newProxyForMessage$">+_newProxyForMessage:</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation(MacroSetup)+_returnInvocationAndDestroyProxy$">+_returnInvocationAndDestroyProxy:</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation(MacroSetup)-initWithMethodSignature$">-initWithMethodSignature:</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation+invocationWithMethodSignature$">+invocationWithMethodSignature:</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation-argumentsRetained">-argumentsRetained</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation-getArgument$atIndex$">-getArgument:atIndex:</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation-getReturnValue$">-getReturnValue:</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation-invoke">-invoke</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation-invokeWithTarget$">-invokeWithTarget:</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation-methodSignature">-methodSignature</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation-retainArguments">-retainArguments</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation-retainArgumentsIncludingTarget$">-retainArgumentsIncludingTarget:</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation-selector">-selector</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation-setArgument$atIndex$">-setArgument:atIndex:</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation-setReturnValue$">-setReturnValue:</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation-setSelector$">-setSelector:</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation-setTarget$">-setTarget:</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation-target">-target</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation-targetRetained">-targetRetained</a></li>
</ul>
<hr width="50%" align="left" />
<div class="method">
<h3><a name="method$NSInvocation+invocationWithMethodSignature$">invocationWithMethodSignature: </a></h3>
+ (<a rel="gsdoc" href="#class$NSInvocation">NSInvocation</a>*) <b>invocationWithMethodSignature:</b> (<a rel="gsdoc" href="NSMethodSignature.html#class$NSMethodSignature">NSMethodSignature</a>*)_signature;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
Returns an invocation instance which can be used to
send messages to a target object using the described
signature. <br /> You must set the target and
selector (using
<a rel="gsdoc" href="#method$NSInvocation-setTarget$">
-setTarget:
</a>
and -setSelector:) before you attempt to use the
invocation. <br /> Raises an
NSInvalidArgumentException if
the signature is <code>nil</code>.
</div>
<hr width="25%" align="left" />
</div>
<div class="method">
<h3><a name="method$NSInvocation-argumentsRetained">argumentsRetained </a></h3>
- (BOOL) <b>argumentsRetained</b>;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
Returns a flag to indicate whether object arguments
of the invocation (including its target) are retained by
the invocation.
</div>
<hr width="25%" align="left" />
</div>
<div class="method">
<h3><a name="method$NSInvocation-getArgument$atIndex$">getArgument: atIndex: </a></h3>
- (void) <b>getArgument:</b> (void*)buffer<b> atIndex:</b> (<a rel="gsdoc" href="TypesAndConstants.html#type$NSInteger">NSInteger</a>)index;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
Copies the argument identified by <var>index</var>
into the memory location specified by the
<var>buffer</var> argument. <br /> An
<var>index</var> of zero is the target object, an
<var>index</var> of one is the selector, so the
actual method arguments start at <var>index</var> 2.
</div>
<hr width="25%" align="left" />
</div>
<div class="method">
<h3><a name="method$NSInvocation-getReturnValue$">getReturnValue: </a></h3>
- (void) <b>getReturnValue:</b> (void*)buffer;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
Copies the invocations return value to the location
pointed to by <var>buffer</var> if a return value
has been set (see the
<a rel="gsdoc" href="#method$NSInvocation-setReturnValue$">
-setReturnValue:
</a>
method). <br /> If there isn't a return value then
this method raises an exception.
</div>
<hr width="25%" align="left" />
</div>
<div class="method">
<h3><a name="method$NSInvocation-invoke">invoke </a></h3>
- (void) <b>invoke</b>;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
Sends the message encapsulated in the invocation to
its target.
</div>
<hr width="25%" align="left" />
</div>
<div class="method">
<h3><a name="method$NSInvocation-invokeWithTarget$">invokeWithTarget: </a></h3>
- (void) <b>invokeWithTarget:</b> (id)anObject;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
Sends the message encapsulated in the invocation to
<var>anObject</var>.
</div>
<hr width="25%" align="left" />
</div>
<div class="method">
<h3><a name="method$NSInvocation-methodSignature">methodSignature </a></h3>
- (<a rel="gsdoc" href="NSMethodSignature.html#class$NSMethodSignature">NSMethodSignature</a>*) <b>methodSignature</b>;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
Returns the method signature of the invocation.
</div>
<hr width="25%" align="left" />
</div>
<div class="method">
<h3><a name="method$NSInvocation-retainArguments">retainArguments </a></h3>
- (void) <b>retainArguments</b>;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
Instructs the invocation to retain its object
arguments (including the target). The default is
not to retain them.
</div>
<hr width="25%" align="left" />
</div>
<div class="method">
<h3><a name="method$NSInvocation-retainArgumentsIncludingTarget$">retainArgumentsIncludingTarget: </a></h3>
- (void) <b>retainArgumentsIncludingTarget:</b> (BOOL)retainTargetFlag;<br />
<div class="availability">
<b>Availability:</b> Not in OpenStep/MacOS-X, Base 1.11.1</div>
<br />
<div class="desc">
Similar to -[NSInvocation retainArguments], but
allows the sender to explicitly control whether the
target is retained as well. Retaining the target is
sometimes not desirable (such as in
NSUndoManager), as retain loops could
result.
</div>
<hr width="25%" align="left" />
</div>
<div class="method">
<h3><a name="method$NSInvocation-selector">selector </a></h3>
- (SEL) <b>selector</b>;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
Returns the selector of the invocation (the
argument at index 1)
</div>
<hr width="25%" align="left" />
</div>
<div class="method">
<h3><a name="method$NSInvocation-setArgument$atIndex$">setArgument: atIndex: </a></h3>
- (void) <b>setArgument:</b> (void*)buffer<b> atIndex:</b> (<a rel="gsdoc" href="TypesAndConstants.html#type$NSInteger">NSInteger</a>)index;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
Sets the argument identified by <var>index</var> from
the memory location specified by the <var>buffer</var>
argument. <br /> Using an <var>index</var> of 0
is equivalent to calling
<a rel="gsdoc" href="#method$NSInvocation-setTarget$">
-setTarget:
</a>
and using an argument of 1 is equivalent to
<a rel="gsdoc" href="#method$NSInvocation-setSelector$">
-setSelector:
</a>
<br /> Proper arguments start at <var>index</var> 2.
<br /> NB. Unlike
<a rel="gsdoc" href="#method$NSInvocation-setTarget$">
-setTarget:
</a>
and
<a rel="gsdoc" href="#method$NSInvocation-setSelector$">
-setSelector:
</a>
the value of <var>buffer</var> must be
<em>a pointer to</em> the argument to be set in the
invocation. <br /> If
<a rel="gsdoc" href="#method$NSInvocation-retainArguments">
-retainArguments
</a>
was called, then any object argument set in the
receiver is retained by it.
</div>
<hr width="25%" align="left" />
</div>
<div class="method">
<h3><a name="method$NSInvocation-setReturnValue$">setReturnValue: </a></h3>
- (void) <b>setReturnValue:</b> (void*)buffer;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
Sets the return value of the invocation to the item
that <var>buffer</var> points to.
</div>
<hr width="25%" align="left" />
</div>
<div class="method">
<h3><a name="method$NSInvocation-setSelector$">setSelector: </a></h3>
- (void) <b>setSelector:</b> (SEL)aSelector;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
Sets the selector for the invocation.
</div>
<hr width="25%" align="left" />
</div>
<div class="method">
<h3><a name="method$NSInvocation-setTarget$">setTarget: </a></h3>
- (void) <b>setTarget:</b> (id)anObject;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
Sets the target object for the invocation. <br /> If
<a rel="gsdoc" href="#method$NSInvocation-retainArguments">
-retainArguments
</a>
was called, then the target is retained.
</div>
<hr width="25%" align="left" />
</div>
<div class="method">
<h3><a name="method$NSInvocation-target">target </a></h3>
- (id) <b>target</b>;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
Returns the target object of the invocation.
</div>
<hr width="25%" align="left" />
</div>
<div class="method">
<h3><a name="method$NSInvocation-targetRetained">targetRetained </a></h3>
- (BOOL) <b>targetRetained</b>;<br />
<div class="availability">
<b>Availability:</b> Not in OpenStep/MacOS-X, Base 1.11.1</div>
<br />
<div class="desc">
Returns <code>YES</code> if target has been
retained yet, <code>NO</code> otherwise.
</div>
<hr width="25%" align="left" />
</div>
<a name="_NSInvocation_ivars"/> <br/><hr width="50%" align="left" />
<h2>Instance Variables for NSInvocation Class</h2>
<h3><a name="ivariable$NSInvocation*_argsRetained">_argsRetained</a></h3>
@public BOOL <b>_argsRetained</b>;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
<em>Warning</em> the underscore at the start of the
name of this instance variable indicates that, even
though it is not technically <em>private</em>, it is
intended for internal use within the package, and
you should not use the variable in other code.
</div>
<hr width="25%" align="left" />
<h3><a name="ivariable$NSInvocation*_cframe">_cframe</a></h3>
@public void* <b>_cframe</b>;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
<em>Warning</em> the underscore at the start of the
name of this instance variable indicates that, even
though it is not technically <em>private</em>, it is
intended for internal use within the package, and
you should not use the variable in other code.
</div>
<hr width="25%" align="left" />
<h3><a name="ivariable$NSInvocation*_info">_info</a></h3>
@public void* <b>_info</b>;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
<em>Warning</em> the underscore at the start of the
name of this instance variable indicates that, even
though it is not technically <em>private</em>, it is
intended for internal use within the package, and
you should not use the variable in other code.
</div>
<hr width="25%" align="left" />
<h3><a name="ivariable$NSInvocation*_numArgs">_numArgs</a></h3>
@public unsigned int <b>_numArgs</b>;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
<em>Warning</em> the underscore at the start of the
name of this instance variable indicates that, even
though it is not technically <em>private</em>, it is
intended for internal use within the package, and
you should not use the variable in other code.
</div>
<hr width="25%" align="left" />
<h3><a name="ivariable$NSInvocation*_retptr">_retptr</a></h3>
@public void* <b>_retptr</b>;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
<em>Warning</em> the underscore at the start of the
name of this instance variable indicates that, even
though it is not technically <em>private</em>, it is
intended for internal use within the package, and
you should not use the variable in other code.
</div>
<hr width="25%" align="left" />
<h3><a name="ivariable$NSInvocation*_retval">_retval</a></h3>
@public void* <b>_retval</b>;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
<em>Warning</em> the underscore at the start of the
name of this instance variable indicates that, even
though it is not technically <em>private</em>, it is
intended for internal use within the package, and
you should not use the variable in other code.
</div>
<hr width="25%" align="left" />
<h3><a name="ivariable$NSInvocation*_selector">_selector</a></h3>
@public SEL <b>_selector</b>;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
<em>Warning</em> the underscore at the start of the
name of this instance variable indicates that, even
though it is not technically <em>private</em>, it is
intended for internal use within the package, and
you should not use the variable in other code.
</div>
<hr width="25%" align="left" />
<h3><a name="ivariable$NSInvocation*_sendToSuper">_sendToSuper</a></h3>
@public BOOL <b>_sendToSuper</b>;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
<em>Warning</em> the underscore at the start of the
name of this instance variable indicates that, even
though it is not technically <em>private</em>, it is
intended for internal use within the package, and
you should not use the variable in other code.
</div>
<hr width="25%" align="left" />
<h3><a name="ivariable$NSInvocation*_sig">_sig</a></h3>
@public NSMethodSignature* <b>_sig</b>;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
<em>Warning</em> the underscore at the start of the
name of this instance variable indicates that, even
though it is not technically <em>private</em>, it is
intended for internal use within the package, and
you should not use the variable in other code.
</div>
<hr width="25%" align="left" />
<h3><a name="ivariable$NSInvocation*_target">_target</a></h3>
@public id <b>_target</b>;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
<em>Warning</em> the underscore at the start of the
name of this instance variable indicates that, even
though it is not technically <em>private</em>, it is
intended for internal use within the package, and
you should not use the variable in other code.
</div>
<hr width="25%" align="left" />
<h3><a name="ivariable$NSInvocation*_targetRetained">_targetRetained</a></h3>
@public BOOL <b>_targetRetained</b>;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
<em>Warning</em> the underscore at the start of the
name of this instance variable indicates that, even
though it is not technically <em>private</em>, it is
intended for internal use within the package, and
you should not use the variable in other code.
</div>
<hr width="25%" align="left" />
<h3><a name="ivariable$NSInvocation*_validReturn">_validReturn</a></h3>
@public BOOL <b>_validReturn</b>;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
<em>Warning</em> the underscore at the start of the
name of this instance variable indicates that, even
though it is not technically <em>private</em>, it is
intended for internal use within the package, and
you should not use the variable in other code.
</div>
<hr width="25%" align="left" />
<br/><hr width="50%" align="left" /><br/>
<h1><a name="002000000000">
Software documentation for the NSInvocation(GNUstep)
category
</a></h1>
<h2><a rel="gsdoc" href="#class$NSInvocation">NSInvocation</a>(<a name="category$NSInvocation(GNUstep)">GNUstep</a>)</h2>
<blockquote class="declared">
<dl>
<dt><b>Declared in:</b></dt>
<dd>Foundation/NSInvocation.h</dd>
</dl>
</blockquote>
<div class="availability">
<b>Availability:</b> Base<br />
Likely to be changed/moved/removed at 1.17.0</div>
<br />
<div class="desc">
Provides some minor extensions and some utility
methods to aid integration of
<code>NSInvocation</code> with the Objective-C
runtime.
</div>
<b>Method summary</b>
<ul>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation(GNUstep)-sendsToSuper">-sendsToSuper</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation(GNUstep)-setSendsToSuper$">-setSendsToSuper:</a></li>
</ul>
<hr width="50%" align="left" />
<div class="method">
<h3><a name="method$NSInvocation(GNUstep)-sendsToSuper">sendsToSuper </a></h3>
- (BOOL) <b>sendsToSuper</b>;<br />
<div class="availability">
<b>Availability:</b> Base<br />
Likely to be changed/moved/removed at 1.17.0</div>
<br />
<div class="desc">
Returns the status of the flag set by
<a rel="gsdoc" href="#method$NSInvocation(GNUstep)-setSendsToSuper$">
-setSendsToSuper:
</a>
</div>
<hr width="25%" align="left" />
</div>
<div class="method">
<h3><a name="method$NSInvocation(GNUstep)-setSendsToSuper$">setSendsToSuper: </a></h3>
- (void) <b>setSendsToSuper:</b> (BOOL)flag;<br />
<div class="availability">
<b>Availability:</b> Base<br />
Likely to be changed/moved/removed at 1.17.0</div>
<br />
<div class="desc">
Sets the <var>flag</var> to tell the invocation that
it should actually invoke a method in the superclass of
the target rather than the method of the target itself.
<br /> This extension permits an invocation to act
like a regular method call sent to <em>super</em> in
the method of a class.
</div>
<hr width="25%" align="left" />
</div>
<h1><a name="003000000000">
Software documentation for the
NSInvocation(MacroSetup) category
</a></h1>
<h2><a rel="gsdoc" href="#class$NSInvocation">NSInvocation</a>(<a name="category$NSInvocation(MacroSetup)">MacroSetup</a>)</h2>
<blockquote class="declared">
<dl>
<dt><b>Declared in:</b></dt>
<dd>Foundation/NSInvocation.h</dd>
</dl>
</blockquote>
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
For use by macros only. <br /> These methods are for
internal use only... not public API <br /> They are
used by the
<a rel="gsdoc" href="Functions.html#macro$NS_INVOCATION">
NS_INVOCATION()
</a>
and
<a rel="gsdoc" href="Functions.html#macro$NS_MESSAGE">
NS_MESSAGE()
</a>
macros to help create invocations.
</div>
<b>Method summary</b>
<ul>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation(MacroSetup)+_newProxyForInvocation$">+_newProxyForInvocation:</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation(MacroSetup)+_newProxyForMessage$">+_newProxyForMessage:</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation(MacroSetup)+_returnInvocationAndDestroyProxy$">+_returnInvocationAndDestroyProxy:</a></li>
<li><a rel="gsdoc" href="NSInvocation.html#method$NSInvocation(MacroSetup)-initWithMethodSignature$">-initWithMethodSignature:</a></li>
</ul>
<hr width="50%" align="left" />
<div class="method">
<h3><a name="method$NSInvocation(MacroSetup)+_newProxyForInvocation$">_newProxyForInvocation: </a></h3>
+ (id) <b>_newProxyForInvocation:</b> (id)target;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
<em>Warning</em> the underscore at the start of the
name of this method indicates that it is private, for
internal use only, and you should not use the
method in your code. <br /> Internal use.
</div>
<hr width="25%" align="left" />
</div>
<div class="method">
<h3><a name="method$NSInvocation(MacroSetup)+_newProxyForMessage$">_newProxyForMessage: </a></h3>
+ (id) <b>_newProxyForMessage:</b> (id)target;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
<em>Warning</em> the underscore at the start of the
name of this method indicates that it is private, for
internal use only, and you should not use the
method in your code.
</div>
<hr width="25%" align="left" />
</div>
<div class="method">
<h3><a name="method$NSInvocation(MacroSetup)+_returnInvocationAndDestroyProxy$">_returnInvocationAndDestroyProxy: </a></h3>
+ (<a rel="gsdoc" href="#class$NSInvocation">NSInvocation</a>*) <b>_returnInvocationAndDestroyProxy:</b> (id)proxy;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
<div class="desc">
<em>Warning</em> the underscore at the start of the
name of this method indicates that it is private, for
internal use only, and you should not use the
method in your code.
</div>
<hr width="25%" align="left" />
</div>
<div class="method">
<h3><a name="method$NSInvocation(MacroSetup)-initWithMethodSignature$">initWithMethodSignature: </a></h3>
- (id) <b>initWithMethodSignature:</b> (<a rel="gsdoc" href="NSMethodSignature.html#class$NSMethodSignature">NSMethodSignature</a>*)aSignature;<br />
<div class="availability">
<b>Availability:</b> OpenStep</div>
<br />
This is a designated initialiser for the class.<br />
Subclasses <strong>must</strong> override this method.<br />
<div class="desc">
Initialised an invocation instance which can be
used to send messages to a target object using
<var>aSignature</var>. <br /> You must set the target
and selector (using
<a rel="gsdoc" href="#method$NSInvocation-setTarget$">
-setTarget:
</a>
and -setSelector:) before you attempt to use the
invocation. <br /> Raises an
NSInvalidArgumentException if
<var>aSignature</var> is <code>nil</code>.
</div>
<hr width="25%" align="left" />
</div>
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