iOS开发--提交应用Your binary is not optimized for iPhone 5

ERROR ITMS-9000: "Your binary is not optimized for iPhone 5 - New iPhone apps and app updates submitted must support the 4-inch display on iPhone 5 and must include a launch image referenced in the info.plist under UILaunchImage with a UILaunchImageSize value set to {320, 568}. Launch images must be PNG files and located at the top-level of your bundle, or provided within each .lproj folder if you localize your launch images.

提交应用时报上面的错，上网搜索了下，下面这个方法可以解决

If you are working with Images.xcassets make sure in your projects settings, General > App Icons and Launch Images > Launch Image Source is set.