ios - 构建 iOS 项目得到架构 i386 错误的重复符号

Question

我在我的项目中使用 paho MQTT 库。

当我在模拟器上构建项目时，出现以下错误。

重复符号 _client_version_eye 在: /Users/xieweizhi/Library/Developer/Xcode/DerivedData/mgiosapp-bctgnqpjhalyqageaduowfwrsrkh/Build/Intermediates/mgiosapp.build/Debug-iphonesimulator/mgiosapp.build/Objects-normal/i386/MQTTClient.o /Users/xieweizhi/Library/Developer/Xcode/DerivedData/mgiosapp-bctgnqpjhalyqageaduowfwrsrkh/Build/Intermediates/mgiosapp.build/Debug-iphonesimulator/mgiosapp.build/Objects-normal/i386/MQTTAsync.o 重复符号 _Log_levels 在: /Users/xieweizhi/Library/Developer/Xcode/DerivedData/mgiosapp-bctgnqpjhalyqageaduowfwrsrkh/Build/Intermediates/mgiosapp.build/Debug-iphonesimulator/mgiosapp.build/Objects-normal/i386/MQTTPacket.o /Users/xieweizhi/Library/Developer/Xcode/DerivedData/mgiosapp-bctgnqpjhalyqageaduowfwrsrkh/Build/Intermediates/mgiosapp.build/Debug-iphonesimulator/mgiosapp.build/Objects-normal/i386/MQTTAsync.o 重复符号 _Log_levels 在: /Users/xieweizhi/Library/Developer/Xcode/DerivedData/mgiosapp-bctgnqpjhalyqageaduowfwrsrkh/Build/Intermediates/mgiosapp.build/Debug-iphonesimulator/mgiosapp.build/Objects-normal/i386/MQTTPacket.o /Users/xieweizhi/Library/Developer/Xcode/DerivedData/mgiosapp-bctgnqpjhalyqageaduowfwrsrkh/Build/Intermediates/mgiosapp.build/Debug-iphonesimulator/mgiosapp.build/Objects-normal/i386/MQTTProtocolClient.o 重复符号 _Log_levels 在: /Users/xieweizhi/Library/Developer/Xcode/DerivedData/mgiosapp-bctgnqpjhalyqageaduowfwrsrkh/Build/Intermediates/mgiosapp.build/Debug-iphonesimulator/mgiosapp.build/Objects-normal/i386/MQTTPacket.o /Users/xieweizhi/Library/Developer/Xcode/DerivedData/mgiosapp-bctgnqpjhalyqageaduowfwrsrkh/Build/Intermediates/mgiosapp.build/Debug-iphonesimulator/mgiosapp.build/Objects-normal/i386/Socket.o 重复符号 _Log_levels 在: /Users/xieweizhi/Library/Developer/Xcode/DerivedData/mgiosapp-bctgnqpjhalyqageaduowfwrsrkh/Build/Intermediates/mgiosapp.build/Debug-iphonesimulator/mgiosapp.build/Objects-normal/i386/MQTTPacket.o /Users/xieweizhi/Library/Developer/Xcode/DerivedData/mgiosapp-bctgnqpjhalyqageaduowfwrsrkh/Build/Intermediates/mgiosapp.build/Debug-iphonesimulator/mgiosapp.build/Objects-normal/i386/MQTTPersistence.o 重复符号 _Log_levels 在: /Users/xieweizhi/Library/Developer/Xcode/DerivedData/mgiosapp-bctgnqpjhalyqageaduowfwrsrkh/Build/Intermediates/mgiosapp.build/Debug-iphonesimulator/mgiosapp.build/Objects-normal/i386/MQTTPacket.o /Users/xieweizhi/Library/Developer/Xcode/DerivedData/mgiosapp-bctgnqpjhalyqageaduowfwrsrkh/Build/Intermediates/mgiosapp.build/Debug-iphonesimulator/mgiosapp.build/Objects-normal/i386/Thread.o 重复符号 _Log_levels 在: /Users/xieweizhi/Library/Developer/Xcode/DerivedData/mgiosapp-bctgnqpjhalyqageaduowfwrsrkh/Build/Intermediates/mgiosapp.build/Debug-iphonesimulator/mgiosapp.build/Objects-normal/i386/MQTTPacket.o /Users/xieweizhi/Library/Developer/Xcode/DerivedData/mgiosapp-bctgnqpjhalyqageaduowfwrsrkh/Build/Intermediates/mgiosapp.build/Debug-iphonesimulator/mgiosapp.build/Objects-normal/i386/MQTTProtocolOut.o ld:架构 i386 的 25 个重复符号 clang:错误:链接器命令失败，退出代码为 1(使用 -v 查看调用)

Answer 1

MQTTClient.c 和 MQTTAsync.c 不应包含在同一个项目中。它们用于构建不同的库。决定您是想要阻塞还是异步行为并使用该文件。