iOS sdk 运行时函数

FOUNDATION_EXPORT NSString *NSStringFromSelector(SEL aSelector);

FOUNDATION_EXPORT SEL NSSelectorFromString(NSString *aSelectorName);

 

FOUNDATION_EXPORT NSString *NSStringFromClass(Class aClass);

FOUNDATION_EXPORT Class NSClassFromString(NSString *aClassName);

 

FOUNDATION_EXPORT NSString *NSStringFromProtocol(Protocol *proto) NS_AVAILABLE(10_5, 2_0);

FOUNDATION_EXPORT Protocol *NSProtocolFromString(NSString *namestr) NS_AVAILABLE(10_5, 2_0);