iphone - What do they mean by "the timespace of the animation's layer" and "in the local active time"? -

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They say:

Time Protocol animation has a fixed number second duration of two properties Using: beginTime and timeoffset beginning time animation indicates the number of seconds in the starting period, and the animation layer grays on the timepace. The time offset specifies an additional offset, but is said in the local active time. Both prices are mixed to determine the final values ​​offset.

I know about time and place but I find it difficult to sweat their words here.

"The animation layer is scaled at the timepace."

Animated visual speed = 2.0

  • Superlar Speed ​​= 2.0
  • Beginners = 1.0

    • So this is real Will start after 0.25 seconds in time? (Double superlair speed, which is twice as superlevel speed, so we have a traffic speed and local speed of Animator 1. Still is quad speed.)

    More time offset "local active time" Does he mean distorted time in motion? That is, if the motion of the Animator object is property 1.0, then is it the local active time here?

    Local active time can really mean a lot of different things for me, for example time or time of the clock during the time-time hierarchy, how would it be great to affect the time of the down Someone can tell details here.

    See the header for core animation; Specifically CAMediaTiming.h: 

      / * CmdTiming protocol is implemented by layers and animation; * Local time mapping to the time values ​​in the origin of the object with each object. * * Absolute time is defined as mach time which changes in seconds. * The CACurrentMediaTime function is provided as a convenience for the query of * current absolute time. * * There are two steps of conversion from local time to local time: * * 1. Conversion to "Active Local Time". It contains * at that point which shows the object in the parent's timeline, and how fast it plays against parents. * * 2. Replaces active "basic local time" timing model * objects with the conversion many times over their original period, * and optionally allows to play back before being repetitive. * /

    Additionally (from comments on properties) 

      / * layer rate. The original time is used for local time, e.g. * If rate is 2, then local time progresses rapidly twice as parents * speed of 1. * / @ property float by default; / * Additional offset in active local time. I.e., the parents * to change the time from TP to active local time: T = (TP - start) * speed + offset * One usage of one 'level' to 'speed' to 'zero' and 'offset' Set "appropriate" as the appropriate price and "stop". 0 to the default. * / @property CFTimeInterval time offset;

    So, it seems that your interpretation is correct.


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