iOS Programming: The Big Nerd Ranch Guide

Bronze Challenge: Clearing Lines

Right now, the TouchDrawView clears its lines whenever the user double taps. Keep this same functionality but have a gesture recognizer perform the recognition of the double tap instead of touchesBegan:withEvent:. Make sure you remove the following code from touchesBegan:withEvent:.

i​f​ ​(​[​t​ ​t​a​p​C​o​u​n​t​]​ ​>​ ​1​)​ ​{​
 ​ ​ ​ ​[​s​e​l​f​ ​c​l​e​a​r​A​l​l​]​;​
 ​ ​ ​ ​r​e​t​u​r​n​;​
}​