计算MKPolyline路径的距离？ [英] Calculate distance of MKPolyline path?

问题描述

我想得到MKPolyline路径的米，这样我就可以告诉用户完成路径的剩余米数。

I would like to get the meters of a MKPolyline path so I can tell the user what are the meters left to finish the path.

我一直在寻找为了做某事，但我得不到任何东西。

I've been searching for something to do it but I couldn't get anything.

谢谢。

推荐答案

听起来很乏味，除非你想自己做数学，否则你可能需要迭代思考该行的点，将每个转换为a CLLocation 并在每个之间使用 -distanceFromLocation：，总计相应的总数。

As tedious as it sounds, unless you want to do the maths yourself you're probably going to have to iterate thought the line's points, convert each to a CLLocation and use its -distanceFromLocation: between each, summing up to the appropriate total.

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