1越锈、本類有機(jī)會(huì)新增一個(gè)方法：
+ (BOOL)resolveClassMethod:(SEL)selOBJC_AVAILABLE(10.5,2.0,9.0,1.0);
+ (BOOL)resolveInstanceMethod:(SEL)selOBJC_AVAILABLE(10.5,2.0,9.0,1.0);
2、備援接受者
- (id)forwardingTargetForSelector:(SEL)aSelectorOBJC_AVAILABLE(10.5,2.0,9.0,1.0);
3砰逻、消息轉(zhuǎn)發(fā)全流程：swift沒法用
- (void)forwardInvocation:(NSInvocation*)anInvocationOBJC_SWIFT_UNAVAILABLE("");
- (NSMethodSignature*)methodSignatureForSelector:(SEL)aSelectorOBJC_SWIFT_UNAVAILABLE("");
+ (NSMethodSignature*)instanceMethodSignatureForSelector:(SEL)aSelectorOBJC_SWIFT_UNAVAILABLE("");
