ios - Gradient with TableView -


i made gradient tableview , works normally, when scroll upwards, black space appears, how can fix it, i know because made transparent tableview. it possible , on objective-c

let gradient = cagradientlayer() var gradientset = [[cgcolor]]() var currentgradient: int = 0  override func viewdidappear(_ animated: bool) {     super.viewdidappear(animated)      gradientset.append([gradientone, gradienttwo])     gradientset.append([gradienttwo, gradientthree])     gradientset.append([gradientthree, gradientone])        gradient.frame = self.tableview.bounds     gradient.colors = gradientset[currentgradient]     gradient.startpoint = cgpoint(x:0, y:0)     gradient.endpoint = cgpoint(x:1, y:1)     gradient.drawsasynchronously = true     tableview.layer.insertsublayer(gradient, at: 0)      animategradient()  }  func animategradient() {     if currentgradient < gradientset.count - 1 {         currentgradient += 1     } else {         currentgradient = 0     }      let gradientchangeanimation = cabasicanimation(keypath: "colors")     gradientchangeanimation.delegate = self     gradientchangeanimation.duration = 5.0     gradientchangeanimation.tovalue = gradientset[currentgradient]     gradientchangeanimation.fillmode = kcafillmodeforwards     gradientchangeanimation.isremovedoncompletion = false     gradient.add(gradientchangeanimation, forkey: "colorchange") }     func animationdidstop(_ anim: caanimation, finished flag: bool) {    if flag {       gradient.colors = gradientset[currentgradient]       animategradient()    } }

i recommend applying gradient uiview sits behind tableview. viewcontrollers view, or new uiview. need make sure size uiview match table.


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