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UIImage-RemoteSize 0.2

You want to add pod 'UIImage-RemoteSize', '~> 0.2' similar to the following to your Podfile:

target 'MyApp' do
  pod 'UIImage-RemoteSize', '~> 0.2'
end

Then run a pod install inside your terminal, or from CocoaPods.app.

Alternatively to give it a test run, run the command:

pod try UIImage-RemoteSize

UIImage Category for getting remote image size (CGSize) without downloading a whole image.

Based on this SO answer

Uses NSURLSession

iOS 7 +