If I have a mobile web app (website with meta tag name="apple-mobile-web-app-capable" content="yes") and save it to the homescreen to create the "app"... then open the app and use the four finger swipe to switch applications and switch back to the mobile web app... it will bring me back, but the app is completely locked/frozen/disabled.
Is there any way to make it so the app doesn't get locked when swiping away and back to it? If not, I suppose it would be better to restart the app than bring up a frozen screen.. so would that be possible?
Restarting the app is easy.
I dont know of any programatic way to disable the 4-finger swipe. I believe you go to settings> general> Multitasking gestures and turn them off.
来源：https://stackoverflow.com/questions/9114270/how-can-i-prevent-ipad-multitasking-gesture-from-locking-mobile-web-app