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Tag: cocoapods

Cocoapods – Generated duplicate UUIDs

I recently added another target to my Podfile to support tvOS. Here is an example of what the Podfile looks like:

source ‘’

target ‘AppiOS’ do
platform :ios, ‘9.0’
pod ‘AFNetworking’, ‘3.0.0-beta.1’

target ‘AppTV’ do
platform :tvos, ‘9.0’
pod ‘AFNetworking’, ‘3.0.0-beta.1’

I got this really long error complaining of duplicate UUIDS. Here is a shortened version:

[!] [Xcodeproj] Generated duplicate UUIDs:

PBXFileReference —
…. /Products/AFNetworking.framework

From what I understand, this deterministic UUIDs is a harmless warning and can be disabled by running the following command in the terminal. Then run pod install again.

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Downgrading Cocoapods

I recently had some issues with a pre-release version of Cocoapods. To fix it, the suggestion was to downgrade Cocoapods to a previous version. It wasn’t obvious how to do that, but this is what I learned.

First you can figure out which version of Cocoapods you are on with the command:

pod –version

You can also see all the version of Cocoapods you have installed with this command:

sudo gem list cocoapods

Next uninstall Cocoapods. If you have multiple version, you will have the choice of uninstalling all or a specific version.

sudo gem uninstall cocoapods

Finally you can install the specific version with this command:

sudo gem install cocoapods -v 0.39.0.beta.3
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ld: library not found for -lPods

I’ve had this error a few times, so I figured I’d document the solution for the next time it occurred.

When doing a build in Xcode, I got the following error:

ld: library not found for -lPods

My project is setup to use cocoapods.

First make sure you are using MyProject.xcworkspace and not MyProject.xcodeproj

For me this was the case.  But I realized that I just created a new configuration for “Ad Hoc” builds.  To fix the problem I had to install the Podfile again with the command:

pod install

After running pod infall, open the project: MyProject.xcworkspace, clean your project and build.  The error should go away.

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