There shouldn't be any warning



I have the same issue and it has to do with the latest version of Xcode (9.3).
I have the same issue. Also please fix typo "tranistionAnimationView_" :)
Lottie has been completely rewritten in Swift as of 3.0 (https://github.com/airbnb/lottie-ios/pull/777)
I am closing all issues prior to this release to reduce the noise. If you continue to run into this issues or any issue with Lottie 3.0 please open a new ticket
For continued support of Lottie Objective-c please point to this branch: https://github.com/airbnb/lottie-ios/tree/lottie/objectiveC
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I have the same issue and it has to do with the latest version of Xcode (9.3).