UIRotationGestureRecognizer 作为音量旋钮
我为 iPhone 制作了一个远程应用程序，现在想为其添加一些手势。我想要的手势之一是改变音量的旋转手势。
我的问题是：如何将 UIRotationGestureRecognizer 提供的旋转和速度“转换”为百分比音量？
我需要将绝对值传递给我远程控制的系统（例如 1% 或 50% 或 100%），并且我知道手势开始时设置的值。但我该如何决定旋转何时足以增加或减少 1% 的音量呢？
这让我很头疼，所以任何帮助将不胜感激。谢谢！
I made a remote app for iPhone and now want to add some gestures to it. One of the gestures I would like is a rotation gesture to change volume.
My problem is: How can I "translate" rotation and velocity that are delivered by the UIRotationGestureRecognizer to percent volume?
I need to pass an absolute value to the system I remote control (like 1% or 50% or 100%) and I know the value set when the gesture starts. But how would I decide when rotation was far enough to increase or decrease the volume by 1%?
This makes a big knot in my head, so any help would be greatly appreciated. Thanks!
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通常用户可以旋转手的最大角度是 180°，所以我认为 1% 是
180° / 100 = 1.8°Usually the most a user can rotate his hand is 180˚, so i think it would make sense that 1% would be
180˚ / 100 = 1.8˚