Multiple Gesture Recognizers
Let’s add another gesture recognizer that allows the user to select a line. (Later, a user will be able to delete the selected line.) You will install another UITapGestureRecognizer on the BNRDrawView that only requires one tap.
In BNRDrawView.m, modify initWithFrame:.
[self addGestureRecognizer:doubleTapRecognizer]; UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self ...