AnimationState.normalizedTime
官方文档的描述
The normalized time of the animation.
A value of 1 is the end of the animation. A value of 0.5 is the middle of the animation.
1 // Fast forward to the middle of the animation 2 animation["Walk"].normalizedTime = 0.5;
原文：http://www.cnblogs.com/gabo/p/4605868.html