title: Adding Google Sheets to iOS using CocoaPods
body: <p>I tried to add Google Sheets to a project, using CocoaPods, but receive an error.</p>
  
  <p>Podfile:</p>
  
  <pre><code>source 'https://github.com/CocoaPods/Specs.git'
  # Uncomment the next line to define a global platform for your project
  # platform :ios, '9.0'
  
  target 'ict' do
  
  pod 'Google/SignIn'
  pod 'GoogleAPIClientForREST/Sheets'
  pod 'GTMAppAuth'
  
  
  
  end
  </code></pre>
  
  <p>Error after installing Pod:</p>
  
  <pre><code>Analyzing dependencies
  Downloading dependencies
  Installing AppAuth (0.7.1)
  Installing FirebaseAnalytics (3.9.0)
  
  [!] Error installing FirebaseAnalytics
  [!] /usr/bin/tar xfz /var/folders/_p/k47cs36s3r585kmsg84x7v580000gp/T/d20170514-96989-lvaiwn/file.tgz -C /var/folders/_p/k47cs36s3r585kmsg84x7v580000gp/T/d20170514-96989-lvaiwn
  
  tar: Unrecognized archive format
  tar: Error exit delayed from previous errors.
  </code></pre>