旋转角色 Swift Playgrounds

Question

我不知道我在这段代码中做错了什么：

func findDegree() -> Double {
    let xValue = directionstick.center.x - 35
    let yValue = directionstick.center.y + 20
    let newX = xValue*xValue
    let newY = yValue*yValue
    let hypo = (newX+newY).squareRoot()
    return (xValue/hypo)

}

此代码用于查找旋转量。

Answer 1

我想通了：

func findDegree() -> Double {
    let xValue = directionstick.center.x - 35
    let yValue = directionstick.center.y + 20
    let angle = atan2(xValue, yValue)
    Return angle
}