Hi,
I have a method that takes one fixed parameter and then a variable number of
parameters, the method is defined as:
-(void) methodX:(NSString*) theName,…
The variable parameter list in this case can contain values of any type, e.g.
an Object pointers, Integers, Floats etc, as in:
NSString* myString;
NSInteger myIntValue1;
NSUInteger* myUIntValue1;
CGFloat* myFloatValue;
[myObj methodX:@"Name1",myString,myIntValue1,myUIntValue1,myFloatValue];
I've written code to work with variable parameter lists in the past, but
previously, I always knew the expected size of the values at compile time, and
they followed a fixed pattern, e.g.
Obj*,Obj*,NSInteger, etc.
But in this, the parameters can be in any order and any time, I do know the
size of each parameter at *Run-Time*, e.g. I use "theName" parameter which is
used to bring back a string of the types for a given name, for example, in the
call:
[myObj methodX:@"Name1",myString,myIntValue1,myUIntValue1,myFloatValue];
methodX would use "Name1" as a key to a dictionary which brings back the
following in this case:
NSString*,NSInteger,NSInteger,CGFloat,
I can use this to figure out the length of the parameter in the method call,
for example:
NSString* 4
NSInteger 4
CGFloat 8
My problem is I can't figure out how to pass in this raw value to the "va_"
functions/macros. See snippet below:
-(void) methodX:(NSString*) theName,…
{
va_list myArgumentList;
NSInteger myArgumentCount;
myArgumentCount = 0;
va_start(myArgumentList,theMethodName);
while(va_arg(myArgumentList,NSString*) != nil) //********************
myArgumentCount++;
va_end(myArgumentList);
…….
…….
…….
}
This is supposed to count the number of parameters, but will fail because it is
assuming a size of 4 (NSString) in:
va_arg(myArgumentList,NSString*)
What I would like to be able to do is to pass in the raw value, something
like, va_argWithSize(myArgumentList,4);
I'm not sure how to do this or even if it is possible to do this?
Any help or suggestions greatly appreciated.
All the Best
Dave
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