他们说:
我知道时空。但是我在这里很难理解他们的话。
“缩放到动画层的时间空间。”
可以说我有这个:
那么它会在 0.25 秒后实时开始吗？ (双超层速度，使子层速度加倍，所以我们有四倍速度。动画师的本地速度为1。所以仍然是四倍速度。)。
并且 timeOffset 表示“在本地事件时间”。他们的意思是被速度扭曲的时间？即如果动画对象的速度属性是 1.0，那么这里是本地事件时间？
本地的活跃时间对我来说真的意味着很多不同的事情。例如时钟时间，或整个时间空间层次结构中的时间如何影响底部的时间。如果有人能在这里指出细节，那就太好了。
最佳答案
查看 Core Animation 的标题；特别是 CAMediaTiming.h:
/* The CAMediaTiming protocol is implemented by layers and animations, it
* models a hierarchical timing system, with each object describing the
* mapping from time values in the object's parent to local time.
*
* Absolute time is defined as mach time converted to seconds. The
* CACurrentMediaTime function is provided as a convenience for querying the
* current absolute time.
*
* The conversion from parent time to local time has two stages:
*
* 1. conversion to "active local time". This includes the point at
* which the object appears in the parent's timeline, and how fast it
* plays relative to the parent.
*
* 2. conversion from active to "basic local time". The timing model
* allows for objects to repeat their basic duration multiple times,
* and optionally to play backwards before repeating. */
另外(来自对属性的评论)
/* The rate of the layer. Used to scale parent time to local time, e.g.
* if rate is 2, local time progresses twice as fast as parent time.
* Defaults to 1. */
@property float speed;
/* Additional offset in active local time. i.e. to convert from parent
* time tp to active local time t: t = (tp - begin) * speed + offset.
* One use of this is to "pause" a layer by setting `speed' to zero and
* `offset' to a suitable value. Defaults to 0. */
@property CFTimeInterval timeOffset;
所以，看来你的解释是正确的。
关于iphone - "the timespace of the animation' s layer"和 "in the local active time"是什么意思？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/1168979/