To create a line graph, I am going to reuse the same project that we used for drawing bars in the previous part of the series. We won’t need the logic for drawing bars anymore, so comment out a dozen of lines of code in the end of the drawRect method, those that deal with bars. I’ve also changed the value of kOffsetX to 0, so that the line graph starts from the left edge of the view. We’ll need to add a couple of values to the dataset, and you can choose any values between 0 and 1
BuildMobile: Creating a Graph With Quartz 2D: Part 3
Alexander wrote his first program in FORTRAN in the year 1979, in Java - in 1996, and also spent a number of years doing Web development with PHP. He is now a founder and a Director of Sirius Lab Ltd, a company offering solutions for iOS and Android platforms. You can also read his Sundraw blog.