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    <p>That's true that before 3.2 UISwipeGestureRecognizer is compiled without warning or errors as stated before but however, I experienced a problem about that. My app was compiled but when I run my app in a 3.1 iphone, UISwipeGestureRecognizer was detecting a swipe event twice. So, I made some conditional coding. My implementation:</p> <pre><code>- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { float version = [[[UIDevice currentDevice] systemVersion] floatValue]; if (version &lt; 3.2) { UITouch *touch = [touches anyObject]; startPosition = [touch locationInView:self]; } [super touchesBegan:touches withEvent:event]; } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { float version = [[[UIDevice currentDevice] systemVersion] floatValue]; if (version &lt; 3.2){ UITouch *touch = [touches anyObject]; CGPoint endPosition = [touch locationInView:self]; if (endPosition.x-startPosition.x&gt;30) { //difference between end and start must be min. 30 pixels to be considered as a swipe. if you change it as startPosition.x-endPosition.x you could detect left swipe [self handleSwipe]; //my swipe handler } } [super touchesEnded:touches withEvent:event]; } </code></pre> <p>and in another method, let's say in viewdidload</p> <pre><code>float version = [[[UIDevice currentDevice] systemVersion] floatValue]; if (version &gt;= 3.2){ UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipe)]; [self addGestureRecognizer:swipe]; } </code></pre> <p>This implementation saves you from the risk of using a private api, although it is not private now. Also, it eliminates the duplicate swipe event problem.</p>
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    1. POUISwipeGestureRecognizer swipe gesture in iOS 3.2
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    1. USÇağatay Gürtürk
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