1、手机IOS12GM版本，收不到正式版推送，可以下载固件：https://ipsw.me/
iTunes 链接iPhone  按下【option+检查版本更新！

2、iPhone尺寸，新增了xr、xs、xrmax

5.8英寸：1125 x2436@3x.png

iPhone XR6.1：828px x 1792@2x.png
6.5英寸：1242x2688@3x.png

https://www.cnblogs.com/superbobo/p/5201526.html
https://help.apple.com/app-store-connect/#/dev4e413fcb8
https://mp.weixin.qq.com/s/8hwfg64SA5BdxV8VkQOs7A

3、xcode10中 libstdc++.6.0.9.tbd 找不到

https://www.jianshu.com/p/cd27028b38ab

https://www.jianshu.com/p/b8b51d71064c

POD文件加入：
post_install do |installer|installer.pods_project.targets.each do |target|target.build_configurations.each do |config|# Fix libstdc++.6在Xcode10编译报错问题if target.name == "CDC"xcconfig_path = config.base_configuration_reference.real_pathxcconfig = File.read(xcconfig_path)new_xcconfig = xcconfig.sub('stdc++.6', 'c++')File.open(xcconfig_path, "w") { |file| file << new_xcconfig }endendend
end

目前亲测有效的方法（感谢海森同学  https://www.jianshu.com/p/8edf6f415877 ）：

<1>、打开真机路径   /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib/

模拟器路径： /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib/

<2>、将libstdc++.6.0.9.tbd  libstdc++.6.tbd  libstdc++.tbd文件件复制到上面相应的路径的路径

真机文件下载地址：http://pbdfw90tv.bkt.clouddn.com/%E7%9C%9F%E6%9C%BA%E6%96%87%E4%BB%B6.zip

模拟器文件下载地址：http://pbdfw90tv.bkt.clouddn.com/%E6%A8%A1%E6%8B%9F%E5%99%A8%E6%96%87%E4%BB%B6.zip

4、Xcode12.0 真机包

http://pbdfw90tv.bkt.clouddn.com/12.0%20%2816A366%29.zip

5、报错：Multiple commands produce '/Users/shaoguangbo/Library/Developer/Xcode/DerivedData/

Xcode10 默认使用New Build System编译，会严格解析各个文件的依赖关系，

编译不过，可以退回Legacy Build System

Xcode -> File -> Workspace Settings

6、our app crashed in iOS9 which upload by Xcode 10 GM Seed

https://stackoverflow.com/questions/52364231/our-app-crashed-in-ios9-which-upload-by-xcode-10-gm-seed

暂时用xcode9打包吧!

7、TabBarItem错误偏移(iOS12.1)临时解决方法：

[[UITabBar appearance] setTranslucent:NO];

8、