The damping ratio for the spring animation as it approaches its quiescent state.
To smoothly decelerate the animation without oscillation, use a value of 1. Employ a damping ratio closer to zero to increase oscillation.
So the damping ration should be a value between 1 and 0. The value set now is what I believe to be the ideal value. If you want to change it in your personal project feel free to tweak it to meet your needs.
According to Apple's documentation:
So the damping ration should be a value between 1 and 0. The value set now is what I believe to be the ideal value. If you want to change it in your personal project feel free to tweak it to meet your needs.