UISwipeGestureRecognizer gesture start point

Is it possible to get a gesture start point from a UISwi开发者_Python百科peGestureRecognizer. like how its possible in

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

    UITouch * touch = [touches anyObject];
    gestureStartPoint = [touch locationInView:self];
}

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According to the UISwipeGestureRecognizer documentation you can:

You may determine the location where a swipe began by calling the UIGestureRecognizer methods locationInView: and locationOfTouch:inView:. The former method gives you the centroid if more than one touch was involved in the gesture; the latter gives the location of a particular touch.

PS: you really should first look at the documentation, the answer was in the class reference of UISwipeGestureRecognizer, shouldn't be hard to find. Part of being a developer is being able to look things up, Apple has excellent documentation, use it!

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WARNING

Amy's answer is totally INCORRECT! Recognizer may generate UIGestureRecognizerStateBegan but on swipe UISwipeGestureRecognizer generates UIGestureRecognizerStateEnded event only.

But touchesBegan: works instead. The problem is if it supports user interaction then it works for current view only and you need to pass it to a parent view.

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Yes, it is possible. See code below:

if ([recognizer state] == UIGestureRecognizerStateBegan || [recognizer state] != UIGestureRecognizerStateChanged) {
    NSLog(@"StateBegan :::::");
}