ios - iOS 7 UITextView is slow after typing lots of text

Question

I\'m having trouble with a slowdown that occurs in UITextView on iOS 7 when typing lots of text. I put a tracer in NSLayoutManager and identified that drawGlyphsForGlyphRange ru

Answer 1

Is the slows down happen when you plugged in (Xcode debugging) your ipad to the macbook/iMac? If yes, try to unplug the cable and try it again with the cable unplugged, see if it still slows down or not. If not, then it only happen when debugging process. (It's just my guess, since I'm not owner of an external keyboard)

Answer 2

Turn off Background App Refresh in Settings General. Also, get rid of NSLog--they slow down beyond what it takes them to print.

I was able to reproduce the slow down effect on iPad under IOS7. In fact IOS6 did not have Background App Refresh.

I believe Apple aims for top of the line models, all others have to adjust.