Xcode中提交二进制文件到App Store后，收到Apple的邮件：
Missing required icon file - The bundle does not contain an app icon for iPad of exactly '76x76' pixels, in .png format for iOS versions >= 7.0.
Missing required icon file - The bundle does not contain an app icon for iPad of exactly '167x167' pixels, in .png format for iOS versions supporting iPad Pro.
Missing required icon file - The bundle does not contain an app icon for iPad of exactly '152x152' pixels, in .png format for iOS versions >= 7.0.
Once these issues have been corrected, you can then redeliver the corrected binary.
因为本来就不打算支持ipad，在XCode中确实没有设置ipad版的icon。在XCode的General页面中，将Devices从Universal改为iPhone，重新编译后提交，就搞定了!