cant add a shape layer into a view's layer

Question

I'm working on CAShapeLayer by creating a layer using CAShapeLayer like following:

CAShapeLayer *shapeLayer = [CAShapeLayer layer];
shapeLayer.frame = CGRectMake(150, 50, 200, 200);
shapeLayer.fillColor = [UIColor whiteColor].CGColor;
shapeLayer.strokeColor = [UIColor orangeColor].CGColor;
[self.view.layer addSublayer:shapeLayer];

However, when I execute the codes and I cant see my shapeLayer in the simulator/device.
What I am missing here.

PS : If I am using CALayer *shapeLayer = [CALayer layer]; it works.Confused

Answer 1

add a path to it, like

 shapeLayer.path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, 2.0*radius, 2.0*radius) 
                                              cornerRadius:radius].CGPath;

A shaped layer needs a shape…

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I put this in my View Controller and it works fine:

- (void)viewDidLoad
{
    [super viewDidLoad];

    CAShapeLayer *shapeLayer = [CAShapeLayer layer];
    shapeLayer.frame = CGRectMake(150, 50, 200, 200);
    shapeLayer.fillColor = [UIColor whiteColor].CGColor;
    shapeLayer.strokeColor = [UIColor orangeColor].CGColor;

    NSUInteger radius = 90;
    shapeLayer.path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, 2.0*radius, 2.0*radius)
                                                 cornerRadius:radius].CGPath;
    [self.view.layer addSublayer:shapeLayer];   
}

If you change the path like

shapeLayer.path = [UIBezierPath bezierPathWithRect:shapeLayer.bounds].CGPath;

it'll result in