Now, I am going to explain how to draw in iPhone.
For drawing we can use touch events (touchBegin and touchMoved).
First,create a View Based Application.
And then Add a new class which inherits from uiimageview, name of class be "MyImageView"
After that in MyImageView.h, add a CGPoint to store the starting Point and NSstring to to knoe the brush is for Drawing or Erasing.
MyImageView.h file look like
And in implemation File(MyImageView.m) look like
To Download complete project Sample Code here



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