Circular animation - ios

Question

I want to implement an animation, its like from a point view starts expanding circularly and filling the entire view. I have implemented the following code but it does not fill the view circularly. Any ideas?
- (void)viewDidLoad {
[super viewDidLoad];
myView =[[UIView alloc]init];
myView.frame=CGRectMake(self.view.frame.size.width/2,self.view.frame.size.height/2+100, .1, .1);
myView.backgroundColor=[UIColor redColor];
[self.view addSubview:myView];
[self animate];
}
-(void)animate{
[UIView animateWithDuration:1.0
delay: 0.0
options:UIViewAnimationOptionCurveEaseOut
animations:^{
[self setRoundedView: myView toDiameter:1000];
}
completion:nil];
}
-(void)setRoundedView:(UIView *)roundedView toDiameter:(float)newSize;
{
CGPoint saveCenter = roundedView.center;
CGRect newFrame = CGRectMake(roundedView.frame.origin.x, roundedView.frame.origin.y, newSize, newSize);
roundedView.frame = newFrame;
roundedView.layer.cornerRadius = newSize / 2.0;
roundedView.center = saveCenter;
}

Answer 1

You can create a CAShape layer with circular Bezier Path and animate the path property.
CABasicAnimation* animation = [CABasicAnimation animationWithKeyPath: #"path"];
Check here for more details : Animating CAShapeLayer size change
If you dont want to use CAnimation you can just scale your rounded view like this :
[UIView animateWithDuration:1.0
delay: 0.0
options:UIViewAnimationOptionCurveEaseOut
animations:^{
myView.transform = CGAffineTransformMakeScale(scaleX,scaleY);
}
completion:nil];

Answer 2

Try this code. May be helpful.
// Set up the shape of the circle
int radius = 100;
CAShapeLayer *circle = [CAShapeLayer layer];
// Make a circular shape
circle.path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, 2.0*radius, 2.0*radius)
cornerRadius:radius].CGPath;
// Center the shape in self.view
circle.position = CGPointMake(CGRectGetMidX(self.view.frame)-radius,
CGRectGetMidY(self.view.frame)-radius);
// Configure the apperence of the circle
circle.fillColor = [UIColor redColor].CGColor;
circle.strokeColor = [UIColor blackColor].CGColor;
circle.lineWidth = 5;
// Add to parent layer
[self.view.layer addSublayer:circle];
// Configure animation
CABasicAnimation *drawAnimation = [CABasicAnimation animationWithKeyPath:#"strokeEnd"];
drawAnimation.duration = 10.0; // "animate over 10 seconds or so.."
drawAnimation.repeatCount = 1.0; // Animate only once..
// Animate from no part of the stroke being drawn to the entire stroke being drawn
drawAnimation.fromValue = [NSNumber numberWithFloat:0.0f];
drawAnimation.toValue = [NSNumber numberWithFloat:1.0f];
// Experiment with timing to get the appearence to look the way you want
drawAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];
// Add the animation to the circle
[circle addAnimation:drawAnimation forKey:#"drawCircleAnimation"];