draw a circle of rectangles in Xcode - ios

Question

I have tried this code to draw a circle of rectangle
incNumberDefault=0;
for (int i = 0; i < maxNumber; i++) {
incNumberDefault = incNumberDefault +5;
UIView *myView = [[UIView alloc] initWithFrame:CGRectMake(incNumberDefault, 100, 3, 15)];
myView.center = CGPointMake(130,130);
myView.transform = CGAffineTransformMakeRotation(DegreesToRadians(incNumberDefault));
myView.backgroundColor = [UIColor lightGrayColor];
[self.speedDisplay addSubview:myView];
}
the outputs seems close circle where as i need transparent or space in middle of circle.

Answer 1

You can set UIView cornerRadius to half of the UIView width or height like,
myView.layer.cornerRadius=myview.frame.size.width / 2; or
myView.layer.cornerRadius=myview.frame.size.height / 2
For that you have to give same width and height to your UIView.

Answer 2

Try this :
// initialize the view with same height and width for perfect circle.
UIView *myView = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 15, 15)];
// round the corner of view with required radius.
myView.layer.cornerRadius = myView.frame.size.width/2; // height can also be used
// circle with space in middle.
myView.backgroundColor = [UIColor clearColor];
myView.layer.borderColor = [UIColor lightGrayColor].CGColor;
myView.layer.borderWidth = 2.0f;
[self.speedDisplay addSubview:myView];
Hope it will solve your problem.

Answer 3

Thank you for your answer but i want to develop a dashed circle in certain distance and i have tired this code :
incNumberDefault=0;
for (int i = 0; i < maxNumber; i++) {
UIView *myView = [[UIView alloc] initWithFrame:CGRectMake(100+60 * sin(incNumberDefault), 100+60*cos(incNumberDefault), 3, 15)];
//myView.transform = CGAffineTransformMakeRotation(DegreesToRadians(incNumberDefault));
myView.backgroundColor = [UIColor lightGrayColor];
[self.speedDisplay addSubview:myView];
incNumberDefault = incNumberDefault +9;
}
but it generate random rectangle in a circle.
I want it in sequence.
Thank you.