How to fix invalid context 0x0 with UIBezierPath? - ios

Question

I am trying to find the best way to implement an rounded rectangle (e.g. looling like the iphone icons). My search suggested using UIBezierPath.
In order to test that class I made a new xcode template (single view application) and basically just added the following lines in ViewController's viewDidLoad:
UIBezierPath* path = [UIBezierPath
bezierPathWithRoundedRect: CGRectMake(10, 10, 120, 120)
cornerRadius: 5];
[[UIColor colorWithRed:0.5 green:0.5 blue:0.5 alpha:1.0] setFill];
[path stroke];
[path fill];
Now I get several "...invalid context 0x0 error...". I assume that I have to set a context first?! But how do I do this or if not fix those errors otherwise?
My search on that error came up with a few posts. Unfortunaltely all of them seemed to have rather complex coding associated. I'm pretty sure however that I have just a very basic misunderstanding here.
Thank you!

Answer 1

you can use this and assign that in layer of your view
UIBezierPath *maskpath=[UIBezierPath bezierPathWithRoundedRect:view1.bounds
byRoundingCorners:UIRectCornerBottomLeft|UIRectCornerBottomRight
cornerRadii:CGSizeMake(10.0,10.0)];
CAShapeLayer *maskLayer=[CAShapeLayer layer];
maskLayer.frame=view1.bounds;
maskLayer.path=maskpath.CGPath;
[view1.layer addSublayer:maskLayer];

Answer 2

in case it is helpful for someone else: on basis of the code provided by johnykumar and another post on a similar topic:
- (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor blackColor];
CGRect frame = CGRectMake(50.0, 50.0, 150.0, 150.0);
CGFloat radius = 20.0;
UIView *frontView = [[UIView alloc] initWithFrame:frame];
frontView.backgroundColor = [UIColor redColor];
CAShapeLayer * maskLayer = [CAShapeLayer layer];
maskLayer.path = [UIBezierPath bezierPathWithRoundedRect:frontView.bounds
byRoundingCorners:UIRectCornerAllCorners
cornerRadii:CGSizeMake(radius, radius)].CGPath;
frontView.layer.mask = maskLayer;
[self.view addSubview:frontView];
}