How to curve the top of a UIViewController in Swift? [closed]

Answer 1

To have rounded cornered edges of View:

In case of UIViewController's default view:

override func viewWillAppear(animated: Bool) {

    self.navigationController?.navigationBarHidden =  true

    //UIView Corner Radius
    self.view.layer.cornerRadius = 20.0;
    self.view.layer.masksToBounds = true

    //UIView Set up border
    self.view.layer.borderColor = UIColor.yellowColor().CGColor;
    self.view.layer.borderWidth = 3.0;        
}

In case of the top status bar:

Make a custom View as the top status bar.

func addStatusBar()
{
    let statusBarView = UIView(frame: CGRect(x: 0.0, y: 0.0, width: UIScreen.mainScreen().bounds.size.width, height: 20.0))

    statusBarView.backgroundColor = UIColor.greenColor()

    //UIView Corner Radius
    statusBarView.layer.cornerRadius = 5.0;
    statusBarView.layer.masksToBounds = true

    //UIView Set up border
    statusBarView.layer.borderColor = UIColor.yellowColor().CGColor;
    statusBarView.layer.borderWidth = 3.0;

    self.navigationController?.navigationBarHidden =  true
    self.view.addSubview(statusBarView)
}

Adding the custom status bar to view:

override func viewWillAppear(animated: Bool) {
    self.addStatusBar()
}

To make a view having rounded top:

extension UIView {

    func addTopRoundedCornerToView(targetView:UIView?, desiredCurve:CGFloat?)
    {
        let offset:CGFloat =  targetView!.frame.width/desiredCurve!
        let bounds: CGRect = targetView!.bounds

        let rectBounds: CGRect = CGRectMake(bounds.origin.x, bounds.origin.y+bounds.size.height / 2, bounds.size.width, bounds.size.height / 2)

        let rectPath: UIBezierPath = UIBezierPath(rect: rectBounds)
        let ovalBounds: CGRect = CGRectMake(bounds.origin.x - offset / 2, bounds.origin.y, bounds.size.width + offset, bounds.size.height)
        let ovalPath: UIBezierPath = UIBezierPath(ovalInRect: ovalBounds)
        rectPath.appendPath(ovalPath)

        // Create the shape layer and set its path
        let maskLayer: CAShapeLayer = CAShapeLayer()
        maskLayer.frame = bounds
        maskLayer.path = rectPath.CGPath

        // Set the newly created shape layer as the mask for the view's layer
        targetView!.layer.mask = maskLayer
    }
}

Usage:

override func viewWillAppear(animated: Bool) {
    self.navigationController?.navigationBarHidden =  true
    self.view.addTopRoundedCornerToView(self.view, desiredCurve: 0.6)
}