Cocoapods Error: The dependency "isn't used in any concrete target

Content Summary:

Podfile after upgrading to the latest version, the contents of the pod must clearly indicate the target of the third-party library used, otherwise the dependency "is not used in any concrete target such errors.

The following are stated from three steps:

1. Podfile Upgrade

To view the pod version:

Pod--version

Pod Upgrade (This is the upgrade to the 1.0.0.beta.2 version):

sudo Install cocoapods--pre

2. Error content:

The content of my podfile is:

Platform:ios,'7.0'pod'Reactivecocoa','2.1.8'pod'Objectiveflickr','2.0.4'pod'Linqtoobjectivec','2.0.0'pod'Sdwebimage','3.6'

An error occurred after Pod install the dependency ' is not used in any concrete target

PodInstall/system/library/frameworks/ruby.framework/versions/2.0/usr/lib/ruby/2.0.0/UNIVERSAL-DARWIN14/RBCONFIG.RB:213: Warning:insecure World Writabledir/applications/cocos/tools/ant/bininchPATH, Mode040777Re-creating CocoaPods due to major version update. Updating Local Specs repositoriesanalyzing dependencies[ !] The dependency ' Reactivecocoa (= 2.1.8) ' is not used on any concrete target. The dependency ' objectiveflickr (= 2.0.4) ' is not used on any concrete target. The dependency ' linqtoobjectivec (= 2.0.0) ' is not used on any concrete target. The dependency ' sdwebimage (= 3.6) ' is not used on any concrete target.

3. Modification Method:

Podfile Content Changes:

Platform:ios,'7.0'Target"Rwtflickrsearch"  Dopod'Reactivecocoa','2.1.8'pod'Objectiveflickr','2.0.4'pod'Linqtoobjectivec','2.0.0'pod'Sdwebimage','3.6'End

If you run the pod install again, it will succeed.

Cocoapods Error: The dependency "isn't used in any concrete target