在Xcode12以下版本沒暴露出來問題，能正常的運行。
一、項目中有重復的文件的報錯
類中文件報 Property has a previous declaration
有重復文件刪除一個就OK了
二、關于sdwebimage報錯
報錯：objc_msgSend(delegate, @selector(webImageManager:didFinishWithImage:forURL:), self, image, url);
Too many arguments to function call, expected 0, have 5
解決：選Build Settings，將 Enable Strict Checking of objc_msgSend Calls 設置為NO
三、類似ld: library not found for -l“”
報錯：
ld: library not found for -lPods-SendCard
clang: error: linker command failed with exit code 1 (use -v to see invocation)
解決：Build Phases -->Link Binary With Libraries 找到Pods-SendCard刪除
四、類似building for iOS Simulator, but linking in object file built for iOS, file
/Users/XXX/Pods/UMengAnalytics/umsdk_IOS_analyics_idfa_v4.1.4/UMMobClick.framework/UMMobClick(UMAOCTools.o), building for iOS Simulator, but linking in object file built for iOS, file '/Users/XXX/Pods/UMengAnalytics/umsdk_IOS_analyics_idfa_v4.1.4/UMMobClick.framework/UMMobClick' for architecture arm64
Target — Build Settings — VALID_ARCHS 的值刪掉
如果項目中用到 x86_64
需VALID_ARCHS 加上 x86_64
https://developer.apple.com/forums/thread/657913
http://www.itdecent.cn/p/55d290a204e7
五、
錯誤you don't have permission,to view or change permissions,select the item in the finder and choose file > Get Info
解決方法
Target——Build Settings最下面有個VALID_ARCHS，加一個x86_64
（部分報錯中也提示arm64，同理加上就可以）
