Question

我在initialize中调用了一个私有方法，并且引发了no方法错误。如果我注释掉私有方法，它可以正常工作。我想我使用私有方法有错误的概念，对吧？

in `initialize': private method `start' called for #<RemoteFocusAutomation::Autofocus:0x007fcfed00a3d8> (NoMethodError)

要点代码在https://gist.github.com/poc7667/7299274

Answer 1

从self方法定义中的self.start(args)移除Autofocus#initialize。你不应该在ruby中使用显式接收器调用私有方法。它必须是隐式调用。

以下是一个例子：

# I tried to call the private method with explicit receiver,which I supposed no to do,
# as Ruby wouldn't allow me,and will give me back error.
class Foo
    def initialize
        self.foo
    end
    private
    def foo;1;end
end

Foo.new
# `initialize': private method `foo' called for # (NoMethodError)

现在我正在做Ruby允许我做的事情：

class Foo
    def initialize
        foo
    end
    private
    def foo;p 1;end
end
Foo.new # => 1 # works!!

在同一个类中调用私有方法会在Ruby 1.9上引发错误

1 个答案: