ios - 使用核心 Action 确定iOS学位程度的读数

Question

我想使用我相信的Core Motion计算液位读数，如此处显示的本机iOS应用程序中所示：http://www.slate.com/blogs/future_tense/2013/09/21/ios7_tips_compass_app_secretly_has_a_level_and_it_s_addictive.html

我该如何实现？

Answer 1

我发现您可以从deviceMotion.gravity实例的CMMotionManager获取角度。

self.motionManager = [[CMMotionManager alloc] init];
[self.motionManager startDeviceMotionUpdates];

CMDeviceMotion *deviceMotion = self.motionManager.deviceMotion;
const CGFloat currentXDegrees = radiansToDegrees(deviceMotion.attitude.roll);
const CGFloat currentYDegrees = radiansToDegrees(deviceMotion.attitude.pitch);