IOS animated pulsing circle like blue ball on maps

try this for SWIFT

let view:UIView = UIView(frame: CGRectMake(200, 200, 100, 100))
view.layer.cornerRadius = 50
view.backgroundColor = UIColor.blueColor()

self.view.addSubview(view)

let scaleAnimation:CABasicAnimation = CABasicAnimation(keyPath: "transform.scale")

scaleAnimation.duration = 0.5
scaleAnimation.repeatCount = 30.0
scaleAnimation.autoreverses = true
scaleAnimation.fromValue = 1.2;
scaleAnimation.toValue = 0.8;

view.layer.addAnimation(scaleAnimation, forKey: "scale")

Try this:

UIView *view = [[UIView alloc] initWithFrame:CGRectMake(200, 200, 100, 100)];
view.backgroundColor = [UIColor blueColor];
view.layer.cornerRadius = 50;

[self.view addSubview:view];

CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
scaleAnimation.duration = 0.2;
scaleAnimation.repeatCount = HUGE_VAL;
scaleAnimation.autoreverses = YES;
scaleAnimation.fromValue = [NSNumber numberWithFloat:1.2];
scaleAnimation.toValue = [NSNumber numberWithFloat:0.8];

[view.layer addAnimation:scaleAnimation forKey:@"scale"];

Set the parameters as you like, to modify the effect.

Edit:

You have to add the QuartzCore framework, and include <QuartzCore/QuartzCore.h> for this to work.

Doing the animation programatically rather than with an image sequence is the better approach (and it's also how Apple do it). It has a number of advantages, not least of which is much better performance (your image sequence animation is unlikely to be running at 60FPS!).

You can achieve this animation in a number of ways: the easiest is probably to create your ring graphic in an image editor, and then create a UIImageView to hold it. You can then simply animate the scale, alpha, and frame properties (making sure your image view is set to resize the image on scale) of the view. To ensure your pulsating animation repeats indefinitely you can set the UIView animation repeat property. Your central 'blue ball' can be a separate UIImageView overlaid on top.

UIView animation is fairly straightforward, and Apple have a lot of sample code to get you going. You just enclose the properties you which to animate inside an animation block, along with your animation parameters (duration, repetition, etc), and iOS will do the rest. Searching on StackOverflow for 'UIView animation' will give you lots and lots of questions that might be of help.