Chains is edit actions on InterfaceBuilder library
- edit chain action on InterfaceBuilder.
- nested actions.
- do sync and async actions .
pod 'Chains'
- add CANAnimation class in viewController view
- connection to target property the View you want to animate
- We will continue to nest the class if you want to connect the animation
execute animation when did view appear
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please set delegate and completion property if want to execute end process
more see also Qiita