ios - 在 UIView 上围绕一个圆圈获取 N 个 CGPoints

Question

我有一个圆心 CGPoint 和半径 Float，我需要得到围绕圆的 N 个点，例如下图中如何得到对应的 12 个点红点。

这是我的不完整函数:

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)

我认为 and 作为参数名称不是很清楚，所以我删除了它。