在UIView上围绕一个圆圈获取N个CGPoints

Question

我得到了一个中心CGPoint和半径Float,我需要在圆圈周围得到N个点,例如在下面的图像中如何得到12个点对应的红点.

这是我不完整的功能:

func getCirclePoints(centerPoint point: CGPoint, and radius: CGFloat, n: Int) [CGPoint] {
    let result: [CGPoint] = stride(from: 0.0, to: 360.0, by: CGFloat(360 / n)).map {
        let bearing = $0 * .pi / 180
        // NO IDEA WHERE TO MOVE FURTHER
    }
    return result
}

getCirclePoints(centerPoint: CGPoint(x: 160, y: 240), radius: 120.0, n: 12)

Answer 1

你快到了!

func getCirclePoints(centerPoint point: CGPoint, radius: CGFloat, n: Int)->[CGPoint] {
    let result: [CGPoint] = stride(from: 0.0, to: 360.0, by: Double(360 / n)).map {
        let bearing = CGFloat($0) * .pi / 180
        let x = point.x + radius * cos(bearing)
        let y = point.y + radius * sin(bearing)
        return CGPoint(x: x, y: y)
    }
    return result
}
let points = getCirclePoints(centerPoint: CGPoint(x: 160, y: 240), radius: 120.0, n: 12)

我不认为and作为一个参数名称非常清楚所以我删除了这个.