在iPad Retina或真实设备上运行时出现Pod错误

Question

这是我的Pod文件

platform :ios, '8.0'
target "Earcrush" do
pod 'PureLayout'
pod 'ECSlidingViewController'
pod 'KGModal'
pod 'AMPopTip'
pod 'WYPopoverController'
pod 'UITextView+Placeholder'
pod 'SVPullToRefresh'
pod 'XCDYouTubeKit'
pod 'youtube-ios-player-helper'
pod 'M13ProgressSuite'
pod 'PINRemoteImage'
pod 'BLKFlexibleHeightBar'
pod 'Firebase/Core'
pod 'Firebase/Database'
pod 'GoogleAPIClient'
pod 'GoogleAPIClient/YouTube'
pod 'GTMOAuth2'
end

当我在任何iPhone模拟器上运行我的项目时，它将成功运行 但是，当我尝试在iPad Retina（iOS8或iOS9）上运行时，我收到以下错误。我试过干净的项目，重新打开Xcode但没有运气

Undefined symbols for architecture arm64:
  "_OBJC_CLASS_$_M13ProgressViewPie", referenced from:
      objc-class-ref in IPProgressViewPie.o
  "_OBJC_METACLASS_$_FacebookStyleBarBehaviorDefiner", referenced from:
      _OBJC_METACLASS_$_ECSearchStyleBarBehaviorDefiner in ECSearchStyleBarBehaviorDefiner.o
  "_OBJC_CLASS_$_WYPopoverTheme", referenced from:
      objc-class-ref in ECBaseMenuViewController.o
  "_OBJC_CLASS_$_GTLServiceYouTube", referenced from:
      objc-class-ref in SimpleYoutube.o
  "_OBJC_CLASS_$_GTLQueryYouTube", referenced from:
      objc-class-ref in SimpleYoutube+Upload.o
  "_OBJC_CLASS_$_PINRemoteImageManager", referenced from:
      objc-class-ref in AppDelegate.o
      objc-class-ref in ECDataManager.o
  "_OBJC_CLASS_$_GTLYouTubeVideo", referenced from:
  ... 
  ld: symbol(s) not found for architecture arm64

我的Pod有什么问题？任何帮助或建议都将非常感激。