问题
If I try to display the multitasking menu with keyboard gestures in iOS Simulator 10.3 bundled with Xcode 8.3, it fails to respond; hovever, the single button press and the option from the menu still works. What can I do to get it to work again?
回答1:
If you disconnect the hardware keyboard (⌘⌥K), it starts working again. This seems to be a bug with iOS Simulator 10.3.
来源：https://stackoverflow.com/questions/43232769/double-home-button-press-does-not-work-in-ios-simulator