iOS 多参数 ...NS_REQUIRES_NIL_TERMINATION 的写法
1.很早就看到项目里面有下面这样的写法
#import <Cocoa/Cocoa.h>@interface NSMutableArray (variadicMethodExample)- (void) appendObjects:(id) firstObject, ...; // This method takes a nil-terminated list of objects.@end@implementation NSMutableArray (variadicMethodExample)- (void) appendObjects:(id) firstObject, ...{id eachObject;va_list argumentList;if (firstObject) // The first argument isn't part of the varargs list, { // so we'll handle it separately. [self addObject: firstObject]; va_start(argumentList, firstObject); // Start scanning for arguments after firstObject. while (eachObject = va_arg(argumentList, id)) // As many times as we can get an argument of type "id" [self addObject: eachObject]; // that isn't nil, add it to self's contents. va_end(argumentList); }}@end