1.获取sel名称
const char *sel_name = sel_getName(@selector(run));
NSLog(@"sel_name:%s",sel_name);
2.获取sel
SEL sel_register_run = sel_registerName("run");
NSLog(@"sel_register_run:%@",NSStringFromSelector(sel_register_run));
3.判断两个sel是否是同一个sel
BOOL is_equal = sel_isEqual(@selector(run), sel_registerName("run"));
NSLog(@"is_equal:%d",is_equal);
