Class CalendarModel is implemented in both A and B One of the two will be used. Which one is .....

Class CalendarModel is implemented in both /Users/zhongqihulian/Library/Developer/CoreSimulator/Devices/5827D04B-BADE-4213-B278-4DE0EFC329ED/data/Containers/Bundle/Application/EE52F2FE-7D17-499B-9274-7FB1E68473F7/XYFrameWork.app/XYFrameWork and /Applications/Xcode_7.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/System/Library/Frameworks/EventKitUI.framework/EventKitUI. One of the two will be used. Which one is undefined.

solve:

Set "Bundle Loader" correctly to $(BUILT_PRODUCTS_DIR)/AppName.app/AppName Set "Symbols Hidden by Default" to NO (in Build Settings of the target application). This is where the linker errors come from because it is YES by default!. I've been struggling with this for so long!.

无效 实际上是 CalendarModel 与系统的 日历库EventKitUI 命名冲突 但为何 出现 还未发现