讓NSLocalizedString自動讀Base.lproj

	#ifndef L
	#define L(key) [NSBundle.mainBundle localizedStringForKey:(key)]
	#endif
	@interface NSBundle (NSLocalizedString_Base)
	- (NSString *)localizedStringForKey:(NSString *)key;
	@end
	@implementation NSBundle (NSLocalizedString_Base)
	- (NSString *)localizedStringForKey:(NSString *)key {
	NSString * s = [self localizedStringForKey:key value:@"" table:nil];
	if ([s isEqualToString:key]) {
	NSString * path = [[NSBundle mainBundle] pathForResource:@"Base" ofType:@"lproj"];
	NSBundle * languageBundle = [NSBundle bundleWithPath:path];
	s = [languageBundle localizedStringForKey:key value:@"" table:nil];
	}
	if (s == nil) {
	s = key;
	}
	return s;
	}
	@end

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讓obj-c也可以跟swift一樣，enum支援字串

	#define LIST_OF_ServerAPI \
	/*會員*/ \
	api(登入, member/login) \
	api(FB登入, member/fbLogin)
	typedef NS_ENUM(NSInteger, ServerAPI) {
	#define api(key, name) key,
	LIST_OF_ServerAPI
	#undef api
	};
	- (void)call {
	NSString *apiKey;
	NSString *apiName;
	switch (api) {
	#define api(key, name) \
	case key: \
	apiKey = @#key; \
	apiName = @#name; \
	break;
	LIST_OF_ServerAPI
	#undef api
	default:
	NSAssert1(false, @"%@：ServerAPI未實作", NSStringFromSelector(_cmd));
	return;
	}
	}

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