iphone - How could Dan Briklin's Note Taker draw lines so smoothly? -

I tried writing a similar hand drawing app. But line drawing is always a bit slow.

If you have written a similar app and have optimized the line drawing, please understand a bit.

I will use some of these settings.

Note the lower setting of AllowAntialiasing.

  CGContextBeginPath (reference); CGContextSetInterpolationQuality (reference, take the KCG interpolation); CGContextSetAllowsAntialiasing (context, true);