Objective-C&&keyword

标准关键字

break const continue default return 
signed unsigned char short int float double  
struct union
if else for while do goto switch case goto
register static volatile auto extern
sizeof 
typedef
void

拓展关键字

asm typeof inline

Objective-C

self super
@interface @protocol @implementation @class @import @required @optional @end 
@public @protected @private @package
@property
@try @throw @catch @finally
@synthesize @dynamic
@selector
@defs
@encode
nonatomic atomic strong weak (retain realse)

swift