Draw Scalable rectangle in xcode..

Hi all

one of my juniors had to make a app in which image cropping was required.The part which required drawing a scalable rectangle on screen was bit tough so here is a simple project...use it where ever u want it ..
Happy coding (touch the corner of rectangle and drag it to scale the rectangle)

dwnload link:-     https://www.dropbox.com/s/2xgu7dhemnary11/PictureKeyBoard.zip

i have used delegate method to call drawrect of the board have called the delegate from touches moved