Confused about ios touches code

Question

-(void)ccTouchesBegan...

UITouch* touch = [touches anyObject];

CGPoint location = [touch locationInView:[touch view]];

Can someone please explain in detail what exactly is going on in these two lines of code. Thanks

Have you maybe took the time to read the documentation to see how it is described there? — David Rönnqvist, Apr 06 '13 at 19:43
sorry I realized I should have asked for more detail, that's why I asked this one — user2252901, Apr 06 '13 at 19:48

score 1 · Accepted Answer · answered Apr 06 '13 at 19:43

UITouch *touch = [touches anyObject];

touches is a NSSet of UITouch. The code simply gets one object from touches and assigns it to a variable named touch. This is implicitly assuming that the NSSet hold only one element.

CGPoint location = [touch locationInView:[touch view]];

the above line gets the (x,y) coordinates of the touch in the coordinate system of the view that intercepted the touch. CGPoint is nothing more than a C struct with two float values, x and y.

So bottom line you will obtain the coordinates of the touch in the view.

Confused about ios touches code

1 Answers1