how to set cornerRadius for only bottom-left,bottom-right and top-left corner of a UIView?

Question

Is there a way to set cornerRadius for only bottom-left,bottom-right and top-left corner of a UIView?

I tried the following, but it ended up making the view disappea

Answer 1

You can do it like this:

UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:self.viewOutlet.bounds byRoundingCorners:(UIRectCornerTopLeft | UIRectCornerBottomLeft | UIRectCornerBottomRight) cornerRadii:CGSizeMake(10.0, 10.0)];

CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
maskLayer.frame = self.view.bounds;
maskLayer.path  = maskPath.CGPath;
self.viewOutlet.layer.mask = maskLayer;

Update:
If You need border just create another CAShapeLayer and add it to view's layer as sublayer. Like this (place this code below upper code):

CAShapeLayer *borderLayer = [[CAShapeLayer alloc] init];
borderLayer.frame = self.view.bounds;
borderLayer.path  = maskPath.CGPath;
borderLayer.lineWidth   = 4.0f;
borderLayer.strokeColor = [UIColor blackColor].CGColor;
borderLayer.fillColor   = [UIColor clearColor].CGColor;

[self.viewOutlet.layer addSublayer:borderLayer];

In swift 3.0 like this:

let maskPath = UIBezierPath.init(roundedRect: self.viewOutlet.bounds, byRoundingCorners:[.topLeft, .bottomLeft], cornerRadii: CGSize.init(width: 10.0, height: 10.0))
let maskLayer = CAShapeLayer()
maskLayer.frame = self.viewOutlet.bounds
maskLayer.path = maskPath.cgPath
self.viewOutlet.layer.mask = maskLayer

Answer 2

Tested in xcode 8 and swift 3

extension UIView {
    func roundCorners(corners:UIRectCorner, radius: CGFloat) {
      let path = UIBezierPath(roundedRect: self.bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius))
      let mask = CAShapeLayer()
      mask.path = path.cgPath
      self.layer.mask = mask
    }
}

And use like this

YourView.roundCorners([.topLeft, .bottomLeft], radius: 10)

Answer 3

On iOS 11, What you only need is the maskedCorners.

    let cornerRadius: CGFloat = 6.0
    if #available(iOS 11, *) {
        productImageView.layer.cornerRadius  = cornerRadius
        productImageView.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]

    } else {
        let path        = UIBezierPath(roundedRect: bounds, byRoundingCorners: [.topLeft , .topRight], cornerRadii:CGSize(width: cornerRadius, height: cornerRadius))
        let maskLayer   = CAShapeLayer()
        maskLayer.frame = bounds
        maskLayer.path  = path.cgPath
        productImageView.mask                = maskLayer
        productImageView.layer.masksToBounds = true
    }

Answer 4

use this code corner radius of view only two sides.after long time i got suggestion ios. here viewFilter is view outlet which we want rounded.

-(void) viewDidAppear:(BOOL)animated{
[super viewDidAppear:animated];
[self setMaskTo:viewFilter byRoundingCorners:UIRectCornerBottomLeft | UIRectCornerBottomRight];
}

-(void)setMaskTo:(UIView*)view byRoundingCorners:(UIRectCorner)corners{

UIBezierPath *rounded = [UIBezierPathbezierPathWithRoundedRect:view.bounds byRoundingCorners:corners cornerRadii:CGSizeMake(20.0, 20.0)];

CAShapeLayer *shape = [[CAShapeLayer alloc] init];
shape.frame = self.view.bounds;
[shape setPath:rounded.CGPath];
view.layer.mask = shape;
}