我正在我的应用程序中实现推送通知(城市飞艇)。我已经编写了代码并添加了包括 libUAirship-1.1.1.a 在内的必要框架,但它显示了以下错误。
Undefined symbols for architecture i386:
"_UTTypeCreatePreferredIdentifierForTag", referenced from:
+[UA_ASIHTTPRequest mimeTypeForFileAtPath:] in libUAirship-1.1.1.a(UA_ASIHTTPRequest.o)
"_UTTypeCopyPreferredTagWithClass", referenced from:
+[UA_ASIHTTPRequest mimeTypeForFileAtPath:] in libUAirship-1.1.1.a(UA_ASIHTTPRequest.o)
"_kUTTagClassFilenameExtension", referenced from:
+[UA_ASIHTTPRequest mimeTypeForFileAtPath:] in libUAirship-1.1.1.a(UA_ASIHTTPRequest.o)
"_kUTTagClassMIMEType", referenced from:
+[UA_ASIHTTPRequest mimeTypeForFileAtPath:] in libUAirship-1.1.1.a(UA_ASIHTTPRequest.o)
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
我不明白为什么会产生这个错误。