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我在寫一個接受函數作爲其參數的函數。目前,該函數爲參數的返回元組的未解析標識符提供了一個錯誤。代碼我目前有:未解析的函數作爲參數的標識符
func getMidPoints() -> (CGPoint, CGPoint) {
// code that calculates midpoint
return (mid1, mid2)
}
func createSubPath(mid1: CGPoint, mid2: CGPoint) -> CGMutablePathRef {
let subpath : CGMutablePathRef = CGPathCreateMutable()
CGPathMoveToPoint(subpath, nil, mid1.x, mid1.y)
CGPathAddQuadCurveToPoint(subpath, nil, previousPoint.x, previousPoint.y, mid2.x, mid2.y)
return subpath
}
createSubPath(getMidPoints())
// Missing argument for parameter 'mid2' in call
我不知道我是否正確使用函數作爲參數。任何幫助,將不勝感激!
嘗試'FUNC createSubPath(MID1:CGPoint,MID2:CGPoint) - > CGMutablePathRef {' –
這就是我最初的,但我得到一個缺少的參數錯誤。我已更新代碼 –
'createSubPath(getMidPoints()。0,getMidPoints()。1)'或更改您的聲明以傳遞元組'func createSubPath(midPoints:(mid1:CGPoint,mid2:CGPoint)) - > CGMutablePathRef { ' –