(XYZ coordinates of the acceleration vector in units of g. As viewed from the front of the phone, positive X is toward the left side, positive Y is toward the bottom, and positive Z points into the face of the phone)
This PLIST-format information contains the elements of a CMTime structure representing the amount of time the phone has been running since the last boot, not including standby time.
Tag ID
Tag Name
Writable
Values / Notes
'epoch'
RunTimeEpoch
no
'flags'
RunTimeFlags
no
Bit 0 = Valid Bit 1 = Has been rounded Bit 2 = Positive infinity Bit 3 = Negative infinity Bit 4 = Indefinite
本文详细介绍了iPhone图像中包含的各种元数据标签及其含义，包括加速度矢量、HDR图像类型等，并深入探讨了运行时间标签的具体结构。
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