红宝石安装yob pdf阅读器 [英] ruby install yob pdf reader

问题描述

我正在尝试安装yob pdf阅读器: https://github.com/yob /pdf-reader#readme

I'm trying to install the yob pdf reader: https://github.com/yob/pdf-reader#readme

我正在按照指示去做:

gem install pdf-reader

报告成功.

我在目录中放置了一个pdf文件，并将其命名为1.pdf.

I place a pdf in my directory, name it 1.pdf.

然后，我创建一个包含以下代码的脚本:

Then I create a script that has the following code:

reader = PDF::Reader.new("1.pdf")

当我运行该脚本时，出现以下错误:

when I run that script I get the following error:

uninitialized constant PDF (NameError)

谷歌搜索到目前为止还不是很成功.

Googling it hasn't been very successful so far.

我该如何解决?

推荐答案

如果它是纯红宝石脚本，则一开始可能会缺少以下内容:

If it's a pure ruby script, you may be missing the following at the beginning:

require 'rubygems'
require 'pdf-reader'

如果安装了多个版本，还可以指定所需的gem版本:

You can also specify the version of the gem that you want to require, in case you have multiple versions installed:

require 'rubygems'
gem 'pdf-reader', "~> 0.10.0"
require 'pdf-reader'

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