iOS 不同target之间的代码共享

1， hostapp的源代码，创建静态库，或者framework的target，编译库后，拖入到extension target中
2， hostapp的源代码，添加compile source files中。
3，注意事项：
扩展app下列方法被禁止调用，
UIApplication sharedApplication方法

build settings编译器选项不同target需要注意设置prefix-header，preprocessor macros

iOS extension扩展和宿主app之间的数据共享

宿主：

userdefults目录
/Users/ff/Library/Developer/CoreSimulator/Devices/CDE3ED20-8AC7-426E-935E-F3226A26302A/data/Containers/Data/Application/4A7E7EEB-63E9-412C-A161-09ACE2871DCC/Library/Preferences/com.lanqxyihhenguisleu.1.plist

bundle目录
/Users/ff/Library/Developer/CoreSimulator/Devices/CDE3ED20-8AC7-426E-935E-F3226A26302A/data/Containers/Bundle/Application/27A672B2-DF17-41D4-9939-0DBB4DE176F1/GitWorkFlowTest.app/PlugIns/MyActionExtension.appex


doc目录
/Users/ff/Library/Developer/CoreSimulator/Devices/CDE3ED20-8AC7-426E-935E-F3226A26302A/data/Containers/Data/PluginKitPlugin/9D7D2E19-20B3-4612-9D7E-D746959B346A


扩展：
userdefults目录

/Users/ff/Library/Developer/CoreSimulator/Devices/CDE3ED20-8AC7-426E-935E-F3226A26302A/data/Containers/Data/PluginKitPlugin/FF3BF7B6-57C8-479C-A390-916567D9C797/Library/Preferences/com.lanqxyihhenguisleu.1.MyActionExtension.plist


/Users/ff/Library/Developer/CoreSimulator/Devices/CDE3ED20-8AC7-426E-935E-F3226A26302A/data/Containers/Bundle/Application/4035127B-AD0C-4F8F-A790-4591A0C4A198/GitWorkFlowTest.app




/Users/ff/Library/Developer/CoreSimulator/Devices/CDE3ED20-8AC7-426E-935E-F3226A26302A/data/Containers/Data/Application/92DA7147-377D-44D0-BDAE-1788C9ACEB2A

1，都有自己的沙盒目录
/var/mobile/Containers/Data/PluginKitPlugin/780B11AA-B897-46E8-B85A-8CD19A169B28/Library/Caches
/var/mobile/Containers/Data/PluginKitPlugin/B608EAB9-E257-4BA2-9094-55DA5209758E/Library/Caches

2，bundle目录，宿主app的bundle子目录下PlugIns目录中
/private/var/containers/Bundle/Application/0D6DF0DC-6F4C-46D1-BE1F-D3EC11755F52/GitWorkFlowTest.app/PlugIns/MyNotficationServiceExt.appex
/private/var/containers/Bundle/Application/9992E4CA-AB6A-4D5D-B28E-F36BE2808F02/GitWorkFlowTest.app/PlugIns/MyTodayExtension.appex

3，多任务环境
TodayExtension工作在主线程，queue: com.apple.main-thread(serial)
UNNotificationServiceExtension工作在queue:com.apple.NSXPCC.ection.user.endpoint(serial)
UNNotificationContentExtension工作在queue：com.apple.main-thread(serail)