了解class方法的method_added

我想在瞬间做一些魔术，并将类方法添加到某个类中。 因此我尝试了以下方法：

module Magic def self.included(base) base.extend ClassMethods end module ClassMethods def method_added(name) puts "class method '#{name}' added" end def some_class_method puts "some class method" end end end class Foo include Magic def self.method_added(name) puts "instance method #{name} added" end end 

这种方法适用于实例方法，类方法失败。 我怎么解决这个问题？ 有什么建议？

Answer 1

您正在寻找singleton_method_added：

 module Magic def self.included(base) base.extend ClassMethods end module ClassMethods def method_added(name) puts "instance method '#{name}' added" end def singleton_method_added(name) puts "class method '#{name}' added" end end end class Foo include Magic def bla end def blubb end def self.foobar end end 

输出：

 instance method 'bla' added instance method 'blubb' added class method 'foobar' added 

请享用！