iOS Programming: The Big Nerd Ranch Guide (6th Edi
18. Touch Events and UIResponder
About the 18. Touch Events and UIResponder category
How can I adapt TouchTracker to draw freeform lines?
Writing Mistakes and Omission
Trouble with the chapter
Do not send the message directly to the next responder
Solution for Ch 18 Silver, and Gold Challenge
"line" var in "override func touchesEnded" -- where is it coming from?
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