Circle animation on complete view controller

How to show the time with animation of circle line, when time is change the small circle line are rotating and make a digit to show the time. I have done these functionality and get the circles with rotating line but, in my approach i have use the UIView to show the circle and two another view inside the circle view to show the two circle line, and then i am rotating these circle line view with transformation to make the number. I have successfully get the time with animating circle line but the main problem is app is too slow. I have created a lot view in view controller that take too much time to handle these view. This is the screenshot of my page.

enter image description here

Please help me.

Thank you in advance.