函数与字符串的相互转化，@selecte函数转化为字符串传递，字符串转化为@select接收

@selecte函数转化为字符串传递

-(void)passFun

{

     [Class  recieveFun:NSStringFromSelector(@selector(fun))];

}

字符串转化为@select接收

-(void)recieveFun:(NSString)funString

{

  SEL selector = NSSelectorFromString(funString);

    

  [self.performFunTarget performSelector:selector withObject:sender];

}