iOS addLayer: how to layout right?












0












$begingroup$


When adding some dash line to the view of a viewController, by add sublayer.



Here is the code:




class ViewController: UIViewController {
@IBOutlet weak var tmpLabel: UILabel!

override func viewDidLoad() {
super.viewDidLoad()
tmpLabel.layer.borderColor = UIColor.red.cgColor;
tmpLabel.layer.borderWidth = 2
tmpLabel.addDashedBorders(padding: 50, y: tmpLabel.bounds.size.height * 0.5)
// ......
}}


extension UIView {


func addDashedBorders( padding x: CGFloat, y : CGFloat) {
//Create a CAShapeLayer
let shapeLayer = CAShapeLayer()
shapeLayer.strokeColor = UIColor.red.cgColor
shapeLayer.lineWidth = 2
shapeLayer.lineDashPattern = [2,3]

let path = CGMutablePath()
path.addLines(between: [CGPoint(x: x, y: y),
CGPoint(x: bounds.size.width * 0.5 - 50, y: y)])
path.addLines(between: [CGPoint(x: bounds.size.width * 0.5 + 50, y: y),
CGPoint(x: bounds.size.width - x, y: y)])
shapeLayer.path = path
layer.addSublayer(shapeLayer)
}
}



The following image is in iPhoneX



000



The code is hard-coded, and not good.



111



I want to add the sub shape layer to the view , right beneath the label.



there is the code




class ViewController: UIViewController {
@IBOutlet weak var tmpLabel: UILabel!

override func viewDidLoad() {
super.viewDidLoad()
tmpLabel.layer.borderColor = UIColor.red.cgColor;
tmpLabel.layer.borderWidth = 2
view.addDashedBorder(padding: 50, y: tmpLabel.frame.origin.y)
//...
}}


extension UIView {
func addDashedBorder( padding x: CGFloat, y : CGFloat) {

let shapeLayer = CAShapeLayer()
shapeLayer.strokeColor = UIColor.red.cgColor
shapeLayer.lineWidth = 2
shapeLayer.lineDashPattern = [2,3]

let path = CGMutablePath()
path.addLines(between: [CGPoint(x: x, y: y),
CGPoint(x: bounds.size.width - x, y: y)])
shapeLayer.path = path
layer.addSublayer(shapeLayer)
}
}





I tested in iPhoneX, there is a distance.



I tried view.safeAreaInsets, it is all zero.



What do I miss?









share









$endgroup$

















    0












    $begingroup$


    When adding some dash line to the view of a viewController, by add sublayer.



    Here is the code:




    class ViewController: UIViewController {
    @IBOutlet weak var tmpLabel: UILabel!

    override func viewDidLoad() {
    super.viewDidLoad()
    tmpLabel.layer.borderColor = UIColor.red.cgColor;
    tmpLabel.layer.borderWidth = 2
    tmpLabel.addDashedBorders(padding: 50, y: tmpLabel.bounds.size.height * 0.5)
    // ......
    }}


    extension UIView {


    func addDashedBorders( padding x: CGFloat, y : CGFloat) {
    //Create a CAShapeLayer
    let shapeLayer = CAShapeLayer()
    shapeLayer.strokeColor = UIColor.red.cgColor
    shapeLayer.lineWidth = 2
    shapeLayer.lineDashPattern = [2,3]

    let path = CGMutablePath()
    path.addLines(between: [CGPoint(x: x, y: y),
    CGPoint(x: bounds.size.width * 0.5 - 50, y: y)])
    path.addLines(between: [CGPoint(x: bounds.size.width * 0.5 + 50, y: y),
    CGPoint(x: bounds.size.width - x, y: y)])
    shapeLayer.path = path
    layer.addSublayer(shapeLayer)
    }
    }



    The following image is in iPhoneX



    000



    The code is hard-coded, and not good.



    111



    I want to add the sub shape layer to the view , right beneath the label.



    there is the code




    class ViewController: UIViewController {
    @IBOutlet weak var tmpLabel: UILabel!

    override func viewDidLoad() {
    super.viewDidLoad()
    tmpLabel.layer.borderColor = UIColor.red.cgColor;
    tmpLabel.layer.borderWidth = 2
    view.addDashedBorder(padding: 50, y: tmpLabel.frame.origin.y)
    //...
    }}


    extension UIView {
    func addDashedBorder( padding x: CGFloat, y : CGFloat) {

    let shapeLayer = CAShapeLayer()
    shapeLayer.strokeColor = UIColor.red.cgColor
    shapeLayer.lineWidth = 2
    shapeLayer.lineDashPattern = [2,3]

    let path = CGMutablePath()
    path.addLines(between: [CGPoint(x: x, y: y),
    CGPoint(x: bounds.size.width - x, y: y)])
    shapeLayer.path = path
    layer.addSublayer(shapeLayer)
    }
    }





    I tested in iPhoneX, there is a distance.



    I tried view.safeAreaInsets, it is all zero.



    What do I miss?









    share









    $endgroup$















      0












      0








      0





      $begingroup$


      When adding some dash line to the view of a viewController, by add sublayer.



      Here is the code:




      class ViewController: UIViewController {
      @IBOutlet weak var tmpLabel: UILabel!

      override func viewDidLoad() {
      super.viewDidLoad()
      tmpLabel.layer.borderColor = UIColor.red.cgColor;
      tmpLabel.layer.borderWidth = 2
      tmpLabel.addDashedBorders(padding: 50, y: tmpLabel.bounds.size.height * 0.5)
      // ......
      }}


      extension UIView {


      func addDashedBorders( padding x: CGFloat, y : CGFloat) {
      //Create a CAShapeLayer
      let shapeLayer = CAShapeLayer()
      shapeLayer.strokeColor = UIColor.red.cgColor
      shapeLayer.lineWidth = 2
      shapeLayer.lineDashPattern = [2,3]

      let path = CGMutablePath()
      path.addLines(between: [CGPoint(x: x, y: y),
      CGPoint(x: bounds.size.width * 0.5 - 50, y: y)])
      path.addLines(between: [CGPoint(x: bounds.size.width * 0.5 + 50, y: y),
      CGPoint(x: bounds.size.width - x, y: y)])
      shapeLayer.path = path
      layer.addSublayer(shapeLayer)
      }
      }



      The following image is in iPhoneX



      000



      The code is hard-coded, and not good.



      111



      I want to add the sub shape layer to the view , right beneath the label.



      there is the code




      class ViewController: UIViewController {
      @IBOutlet weak var tmpLabel: UILabel!

      override func viewDidLoad() {
      super.viewDidLoad()
      tmpLabel.layer.borderColor = UIColor.red.cgColor;
      tmpLabel.layer.borderWidth = 2
      view.addDashedBorder(padding: 50, y: tmpLabel.frame.origin.y)
      //...
      }}


      extension UIView {
      func addDashedBorder( padding x: CGFloat, y : CGFloat) {

      let shapeLayer = CAShapeLayer()
      shapeLayer.strokeColor = UIColor.red.cgColor
      shapeLayer.lineWidth = 2
      shapeLayer.lineDashPattern = [2,3]

      let path = CGMutablePath()
      path.addLines(between: [CGPoint(x: x, y: y),
      CGPoint(x: bounds.size.width - x, y: y)])
      shapeLayer.path = path
      layer.addSublayer(shapeLayer)
      }
      }





      I tested in iPhoneX, there is a distance.



      I tried view.safeAreaInsets, it is all zero.



      What do I miss?









      share









      $endgroup$




      When adding some dash line to the view of a viewController, by add sublayer.



      Here is the code:




      class ViewController: UIViewController {
      @IBOutlet weak var tmpLabel: UILabel!

      override func viewDidLoad() {
      super.viewDidLoad()
      tmpLabel.layer.borderColor = UIColor.red.cgColor;
      tmpLabel.layer.borderWidth = 2
      tmpLabel.addDashedBorders(padding: 50, y: tmpLabel.bounds.size.height * 0.5)
      // ......
      }}


      extension UIView {


      func addDashedBorders( padding x: CGFloat, y : CGFloat) {
      //Create a CAShapeLayer
      let shapeLayer = CAShapeLayer()
      shapeLayer.strokeColor = UIColor.red.cgColor
      shapeLayer.lineWidth = 2
      shapeLayer.lineDashPattern = [2,3]

      let path = CGMutablePath()
      path.addLines(between: [CGPoint(x: x, y: y),
      CGPoint(x: bounds.size.width * 0.5 - 50, y: y)])
      path.addLines(between: [CGPoint(x: bounds.size.width * 0.5 + 50, y: y),
      CGPoint(x: bounds.size.width - x, y: y)])
      shapeLayer.path = path
      layer.addSublayer(shapeLayer)
      }
      }



      The following image is in iPhoneX



      000



      The code is hard-coded, and not good.



      111



      I want to add the sub shape layer to the view , right beneath the label.



      there is the code




      class ViewController: UIViewController {
      @IBOutlet weak var tmpLabel: UILabel!

      override func viewDidLoad() {
      super.viewDidLoad()
      tmpLabel.layer.borderColor = UIColor.red.cgColor;
      tmpLabel.layer.borderWidth = 2
      view.addDashedBorder(padding: 50, y: tmpLabel.frame.origin.y)
      //...
      }}


      extension UIView {
      func addDashedBorder( padding x: CGFloat, y : CGFloat) {

      let shapeLayer = CAShapeLayer()
      shapeLayer.strokeColor = UIColor.red.cgColor
      shapeLayer.lineWidth = 2
      shapeLayer.lineDashPattern = [2,3]

      let path = CGMutablePath()
      path.addLines(between: [CGPoint(x: x, y: y),
      CGPoint(x: bounds.size.width - x, y: y)])
      shapeLayer.path = path
      layer.addSublayer(shapeLayer)
      }
      }





      I tested in iPhoneX, there is a distance.



      I tried view.safeAreaInsets, it is all zero.



      What do I miss?







      swift ios layout





      share












      share










      share



      share










      asked 3 mins ago









      black_pearlblack_pearl

      1187




      1187






















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