“Failed to receive system gesture state notification before next touch”

转载自: http://stackoverflow.com/questions/23452651/failed-to-receive-system-gesture-state-notification-before-next-touch

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I have an app with an app with a UIScrollView. I am letting IOS handle all the I/O (i.e., no gesture recognizers). I have a cat that likes playing on the iPad and she is able to manipulate the scroll view in such a way that it gets the error in the title. I have seen this mentioned in other posts where there were pinch guested recognizer. What would be causing this in the absence of one? What does it mean? I don't know what the cat does to cause this. She can do it nearly on demand. I can't do it at all.

Switch off Multitasking Gestures. This can be done in the Settings panel.

iOS 7 adds support for gestures which allow you to control audio or consult the calendar. You do not need to add gesture recognizers of your own; the OS brings them in all by itself. They also cannot be disabled from within the app.

Now for what I suspect is the reason for the messages: It seems your cat is sending so many touch events to the touch recognizer that it is overloaded. This is in essence what the error message means. It could not process all touch events in a timely manner.
After all, a cat has four paws ...

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