问题
I know there's no way for my app to control multitasking gestures, but I'm wondering if there might be a way I can check to see if they're on or off.
回答1:
As far as I know its not possible to know from code if this feature is ON or OFF.
This can only be turned ON or OFF by the user from the "Settings".
Well if we are talking about Jailbroken iOS device, then its a different ball-game. There it might be possible to do this.
来源：https://stackoverflow.com/questions/8009590/ios-multitasking-gestures-is-there-any-way-to-check-if-the-user-has-them-turned