App not sized properly iOS 8 iPhone simulator

问题:

I decided to rewrite one of my apps from scratch to clean up the code & perhaps optimize it for iOS 8, but when I run the new version in the iPhone simulator the resolution doesn't seem to be correct. There is letterboxing around the top and bottom edges of the app, but the old version doesn't have that even when run on the same Xcode 6 simulator.

Even though I'm using the iPhone 5 simulator (which should be 640 x 1136), the output of [[UIScreen mainScreen] bounds].size is 640 x 960. Every simulator just seems to be running the app at the iPhone 4 resolution. Any ideas what might be causing this?

回答1:

You need to include Launch Images for all the resolutions you want to support. Default is only 640 x 960. If you include an image with the resolution of 640 x 1136 as a launch image you will support iPhone5. For iPhone6 and 6Plus include launch images in the correct size. See https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/MobileHIG/IconMatrix.html