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POObjective C & iOS: running a timer? NSTimer/Threads/NSDate/etc
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copied!<p>I am working on my first iOS app, and have run in the first snag I have not been able to find a good answer for.</p> <p>The problem: I have a custom <code>UIGestureRecognizer</code> and have it all wired up correctly, and I can run code for each touch in the <code>@selector</code> after recognition. This has been fine for most things, but it's a little too much input for others. </p> <p>My goal: To make a timer that triggers at a specified interval to run the logic, and to be able to cancel this at the moment touches are cancelled.</p> <p>Why I am asking here: There are a lot of possibilities for solutions, but none has stood out as the best to implement. So far it seems like</p> <ul> <li><code>performSelector</code> (and some variations on this)</li> <li><code>NSThread</code></li> <li><code>NSTimer</code></li> <li><code>NSDate</code></li> <li>Operation Queues</li> <li>I think I found some others as well...</li> </ul> <p>From all the research, some form of making a thread seems the route to go, but I am at a loss at which would work best for this situation. </p> <p>An example of an implementation: an <code>NSPoint</code> is taken every 0.10 seconds, and the distance between the previous and current point is taken. [Taking the distance between every point was yielding very messy results]. </p> <p>The relevant code:</p> <pre><code>- (void)viewDidLoad { CUIVerticalSwipeHold *vSwipe = [[CUIVerticalSwipeHold alloc] initWithTarget:self action:@selector(touchHoldMove:)]; [self.view addGestureRecognizer:vSwipe]; [vSwipe requireGestureRecognizerToFail:doubleTap]; } ... - (IBAction)touchHoldMove:(UIGestureRecognizer *)sender { if (sender.state == UIGestureRecognizerStateEnded) { } if (sender.state == UIGestureRecognizerStateBegan) { } //other stuff to do goes here } </code></pre>

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