iPhone ObjC函数中的变量args

#import <SenTestingKit/SenTestingKit.h>

@interface VAArgsTest : SenTestCase
{

}

@end

NSString* vaArgsAppend(NSString *first, ...)
{
  NSMutableString *list = [[NSMutableString alloc] initWithString:first];
  id eachArg;
  va_list argumentList;
  va_start(argumentList, first);
  while(eachArg = va_arg(argumentList, id)) {
    if(eachArg)[list appendString:(NSString*)eachArg];
  }
  va_end(argumentList);
  return [list autorelease];
}

@implementation VAArgsTest

-(void) testCallVaArgsAppend
{
  NSString *result = vaArgsAppend(@"one ", "two ", @"three");
  STAssertEqualObjects(result, @"one two three", @"Expected appended string.");
}

@end