如何在桌子正面朝上的情况下检测iPhone是否在旋转? [英] How can I detect if an iPhone is rotating while being face up in a table?

问题描述

有没有一种方法可以检测放置在桌子上方的iphone是否正在旋转?我确实意识到加速度计没有报告这种运动，也没有报告给-(BOOL)应该AutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation方法.

Is there a way to detect if an iphone lying down in a table face up is rotating?. I do realize that this kind of movement is not reported by the accelerometer and neither is it reported to the - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation method.

有没有一种方法可以检测以这种方式旋转的手机的角度变化?谢谢.

Is there a way to detect angle variations for the phone rotating this way?. Thank you.

推荐答案

重力向量在平面上旋转时将保持恒定，因此您在加速度计上看不到任何东西.您可以遵循指南针方向更改来检测此旋转，但只能在iPhone 3GS上进行.请参见

The gravity vector will be constant as it rotates on a flat table so you won't see anything on the accelerometers. You could follow compass heading changes to detect this rotation but only on an iPhone 3G S. See the CLLocationManager for details, look at the heading methods.

编辑-使用iPhone 4，您可以使用陀螺仪检测旋转. iOS 4中有一个名为 CMMotionManager 以获得

EDIT - With an iPhone 4 you can detect the rotation using the gyros. There is a new class in iOS 4 called CMMotionManager for getting rotation rate from the gyros.

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