How can i remove the circle drawn in iOS? - ios

Question

I have this code where I draw circles on the screen, and I want to remove just the last circle drawn. What can I do? The code is set to draw a circle when I tap twice. I want to remove the last circle drawn when I tap one time.
- (UIBezierPath *)makeCircleAtLocation:(CGPoint)location radius:(CGFloat)radius {
iOSCircle *circle = [[iOSCircle alloc] init];
circle.circleCenter = location;
circle.circleRadius = radius;
[totalCircles addObject:circle];
UIBezierPath *path = [UIBezierPath bezierPath];
[path addArcWithCenter:circle.circleCenter
radius:circle.circleRadius
startAngle:0.0
endAngle:M_PI * 2.0
clockwise:YES];
return path;
}
- (IBAction) tapEvent: (UIGestureRecognizer *) sender
{
CAShapeLayer *shapeLayer = [CAShapeLayer layer];
shapeLayer.path = [[self makeCircleAtLocation:location radius:2.5] CGPath];
shapeLayer.strokeColor = [[UIColor redColor] CGColor];
//shapeLayer.fillColor = nil;
shapeLayer.lineWidth = 2.5;
// Add CAShapeLayer to our view
[self.view.layer addSublayer:shapeLayer];
// Save this shape layer in a class property for future reference,
// namely so we can remove it later if we tap elsewhere on the screen.
self.circleLayer = shapeLayer;
}
}

Answer 1

Create your circle in a distinct CAShapeLayer layer using a CGPath, and add it as a sublayer of your view.layer. That way, you will have total control over that circle (showing or hiding it).