Ios 无效的`VideoRow.podspec`文件：“TLPhotoPicker”的未定义方法`join'：字符串

当我试图创建自己的播客文件时，我不明白为什么会发生这个错误

我在这里学习这个教程

然而，当我在最后一步尝试运行pod安装时，它会给我这个错误

VideoRow.podspec文件无效：TLPhotoPicker的未定义方法“join”：字符串

这两种方法似乎都是正确的，但每次尝试运行pod安装时都会出现错误。

依赖项序列中没有=项

执行s.dependency“TLPhotoPicker”。文档。

依赖项序列中没有=项

执行s.dependency“TLPhotoPicker”。医生

    Pod::Spec.new do |s|
  s.name             = 'VideoRow'
  s.version          = '0.1.0'
  s.summary          = 'Eureka row that allows us to take or select a video.'
  s.description      = <<-DESC
This is an add-on to the many rows that are in the Eureka Community. This row will allow users to select a video from there library to export to a backend service of there choosing.
                       DESC
  s.homepage         = 'https://github.com/EurekaCommunity/VideoRow'
  s.license          = { :type => 'MIT', :file => 'LICENSE' }
  s.author           = { 'Smiller193' => 'shawn.miller@temple.edu' }
  s.source           = { :git => 'https://github.com/EurekaCommunity/VideoRow.git', :tag => s.version.to_s }
   s.social_media_url = 'https://twitter.com/EurekaCommunity'

  s.ios.deployment_target = '9.1'

  s.source_files = 'VideoRow/Classes/**/*'
  s.platform = :ios, "10.0"
  s.dependency = 'TLPhotoPicker'
  s.dependency = 'Eureka'
  s.swift_version = '4.2'
end

    use_frameworks!

target 'VideoRow_Example' do
  pod 'VideoRow', :path => '../'
  pod 'Eureka'
  pod 'TLPhotoPicker'
  target 'VideoRow_Tests' do
    inherit! :search_paths


  end
end