I tried to add Firebase SDK to my iOS app through CocoaPods.

I followed <https://cocoapods.org/pods/Firebase> and `$pod install`
gave me this error:

> 
> Unable to find a specification for `Firebase`
> 
> 
> 

I followed some other pages people's suggestions like:

```
pod update Firebase --verbose

```

Or changing pod `'Firebase'` to pod `'Firebase', '>= 2.3.2'` in Podfile.

None of them worked. At the end I gave up and followed Manual Alternative <https://www.firebase.com/docs/ios/alternate-setup.html>.

I appreciate for help to resolve CocoaPods Method.