Lag while drawing in ios7

Question

I am having an app in which I am doing some sketching on a view.

So far, it was working fine until I installed ios7.

My app uses touches moved met

Answer 1

Here's listed same code with same problem on ios7 https://stackoverflow.com/questions/18198129/ios-7-making-my-apps-drawing-algorithm-lag people suggest moving drawing logic into drawRect: