Linear position keyframes are eased about lottie-ios

[buba447]

Finally looked into this! So its not actually the timing information thats causing the error, its the control point on the path. Its a linear path but it has a control point on the end. This is confusing Core Animation for some reason. It seems that core animation doesn't solely depend on timing functions for easing unfortunately. To fix this we will have to write a custom interpolator.

For now a quick fix is to just remove the control point from your path animation

[therealsalih]

Can you send the AE file so we can test it out?

[lawsonshanks]

@therealsalih Here is the AE file. Animation works fine in AE and the bodymovin preview, but seems to have a lag in the first y-axis position transform when run through Lotti.
drop-rotate.aep.zip

[therealsalih]

Hi @nlogioco and @lawsonshanks I can see what the issue is here. it looks like there an issue with linear position keyframes. they look like they are easing even though they are linear. We will look into this ASAP! Thanks!

[catlan]

@buba447 Thx!

We run into this issue with the first animation we created. May I suggest to add this as know issue in the readme.

[buba447]

Finally found a fix for this!
Lottie has been completely rewritten in Swift as of 3.0 (#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