使用CocoaPods保留旧版本的Firebase

Question

Firebase已更新至4.0，破解了大量代码，因此我需要将我的安装保留在3.x-ish。我从来没有这样做过，所以我，但我得到的错误是这样的：

[!] Unable to satisfy the following requirements: 

- `Firebase/RemoteConfig (= 1.3.4)` required by `Podfile` 
- `Firebase/RemoteConfig (= 1.3.4)` required by `Podfile` 

None of your spec sources contain a spec satisfying the dependency: `Firebase/RemoteConfig (= 1.3.4)`. 

You have either: 
* out-of-date source repos which you can update with `pod repo update` or with `pod install --repo-update`. 
* mistyped the name or version. 
* not added the source repo that hosts the Podspec to your Podfile. 

Note: as of CocoaPods 1.0, `pod repo update` does not happen on `pod install` by default. 

这是我想在我的podfile冻结方式：

pod 'Firebase/Database', '3.1.2' 
pod 'Firebase/Auth', '3.1.1' 
pod 'Firebase/RemoteConfig', '1.3.4' 
pod 'Firebase/Messaging', '1.2.3' 

顺便说一句我试图pod repo update到徒劳无功。

Answer 1

这个固定：

pod 'Firebase/Database', '<4' 
pod 'Firebase/Auth', '<4' 
pod 'Firebase/RemoteConfig', '<4' 
pod 'Firebase/Messaging', '<4'