In our MonoTouch projects, is adding a Default-568h@2x.png image, at 640 x 1136 all that is needed to support the app as is on an iPhone 5 ?
t9mike
That is the key change required for the OS to size the window to fill the iPhone 5 display. Redth# has posted a writeup on this and other size-related tweaks you might need to make.
来源：https://stackoverflow.com/questions/12412063/monotouch-adding-default-568h2x-png-for-iphone-5-retina-4