Create a view with rounded corners (quarter circle)

I want to create a view as shown below

to achieve this I have tried the following:

UIView *myView = [[UIView alloc] init];
imgView.frame = CGRectMake(50, 150, 200, 200);
[self.view addSubview:imgView];

UIBezierPath *maskPath;
maskPath = [UIBezierPath bezierPathWithRoundedRect:myView.bounds
                                 byRoundingCorners:UIRectCornerTopRight
                                       cornerRadii:CGSizeMake(50.0, 50.0)];

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

but it hasn't worked for me. Could someone help me out?

Pseudo code :

    UIView *myView = [[UIView alloc] initWithFrame:CGRectMake(50, 150, 200, 200)];
myView.backgroundColor = [UIColor blueColor];
UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:myView.bounds
                                 byRoundingCorners:UIRectCornerAllCorners
                                       cornerRadii:CGSizeMake(CGRectGetWidth(myView.frame), CGRectGetHeight(myView.frame))];

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


CGRect frame = myView.frame;
CGRect remainder, slice;

CGRectDivide(frame, &slice, &remainder, CGRectGetHeight(frame)/2, CGRectMaxYEdge);

NSLog(@"%@",NSStringFromCGRect(frame));
NSLog(@"%@",NSStringFromCGRect(remainder));
NSLog(@"%@",NSStringFromCGRect(slice));

CGRect remainder2, slice2;
CGRectDivide(remainder, &slice2, &remainder2, CGRectGetWidth(remainder)/2, CGRectMaxXEdge);

NSLog(@"%@",NSStringFromCGRect(remainder));
NSLog(@"%@",NSStringFromCGRect(remainder2));
NSLog(@"%@",NSStringFromCGRect(slice2));

myView.frame = remainder2;
[self.view addSubview:myView];

hopefully y answer is clear .. 😁