Xcode 10.2.1 (10E1001)
Ionic CLI 5.2.1
Cordova CLI 8.1.2
After building your Ionic project, you open with Xcode then build and got following error:
library not found for -lPods-[your app name]
The error is caused by missing Pod library, most likely your app is using CocoaPods to manage some of dependency libraries.
To solve this issue, in /platforms/ios/ folder, do not open .xcodeproj file with Xcode, instead, open .xcworkspace file and build. The workspace file will include Pods libraries.