今天在打包app时报了下面的错误，现以解决写此文章记录一下，希望能给遇到同样问题的朋友参考一下。
问题描述：
ERROR ITMS-90096: "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 UILaunchImages 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. Learn more about iPhone 5 support and app launch images by reviewing the 'iOS Human Interface Guidelines' at https://developer.apple.com/ios/human-interface-guidelines/graphics/launch-screen."
ERROR ITMS-90096: "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 UILaunchImages 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. Learn more about iPhone 5 support and app launch images by reviewing the 'iOS Human Interface Guidelines' at https://developer.apple.com/ios/human-interface-guidelines/graphics/launch-screen."
解决方案：
在工程里的Images.xcassets添加并设置LaunchImage对解决ERROR ITMS-90096根本不会起到任何作用，需要单独添加针对iPhone 5的载入图片。
关键点有三项：
1、图片的名称必须叫Default-568.png。
2、必须把图片放在工程的根目录下。
3、图片尺寸必须是320*568。
<key>UILaunchImages</key>
<array>
<dict>
<key>UILaunchImageName</key>
<string>Default-568</string>
<key>UILaunchImageSize</key>
<string>{320, 568}</string>
</dict>
</array>
PS: 查看plist文件的方法如下图
