Seems like clearing a drawing on IOS works only when dealing with opaque colors.
I need to draw on an image , And I need to clear the drawing if needed.
Tried both clear() and clearWithColor() but :
- clear() or clearWithColor with an opque color = fill all with a color (= no transparency of course)
- clearWithColor with a transparent color = wont erase the content before applying (adding) a transparent color = fail
How can I erase the drawing and having it back to transparent ?
Thanks