Getting all touch events of an app

Question

I've been looking for a way to intercept all touch events of an app. I saw that I can add a gesture recognizer to the main window and get all the touches by using it's delegate method:

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
NSLog(@"%@",touch);
return NO;
}

This way I don't harm all of the other touch events the app has. The problem is that I cannot get swipe events and such this way. Moreover, I cannot override UIWindow sendEvents because my app is an outside framework. I also do not want to add a transparent UIView on top.

Is there any other way to get swipes and other gesturs?

Check out this answer http://stackoverflow.com/a/309535/1176219 — Moonkid, Mar 26 '14 at 15:16

score 0 · Answer 1 · answered Mar 26 '14 at 16:59

0

To intercept all touch events of an app, use a UIWindow subclass and override sendEvent:.... Every touch event passes through this bottleneck method. Be warned that you are now operating at a very low level and can easily break everything.

answered Mar 26 '14 at 16:59

matt

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1

As I mentioned, I cannot do that as I'm working on a framework. – Adam Mar 31 '14 at 15:04

score 0 · Accepted Answer · answered Mar 31 '14 at 15:09

I managed to get this to work by using a custom gesture recognizer attached to the keyWindow and with using the method:

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}

Which also gives me all the touches and doesn't disturb any other recognizers.

If anyone know why I shouldn't be doing that, I'd be happy to hear about it.

Getting all touch events of an app

2 Answers2