Ios 用于_NTP_日志记录的架构armv7的未定义符号

首先，有很多问题被问到如何解决在导入lib/文件时出现的编译错误。谁能首先解释一下“架构armv7的未定义符号”是什么意思。我为ntp client for iso（）导入了文件，它在自己的Xcode项目中工作，但当我移动到我的项目时，它失败了，出现了以下错误和警告。有什么想法吗

    Undefined symbols for architecture armv7:
     "_NTP_Logging", referenced from:
      -[NetAssociation evaluatePacket] in NetAssociation-586077E517B5DC42.o
      -[NetworkClock associationTrue:] in NetworkClock-496336397AA5FC44.o
      -[NetworkClock associationFake:] in NetworkClock-496336397AA5FC44.o
    "_DEFINE_SHARED_INSTANCE_USING_BLOCK", referenced from:
     +[NetworkClock sharedInstance] in NetworkClock-496336397AA5FC44.o
    "_LogInProduction", referenced from:
     -[NetAssociation enable] in NetAssociation-586077E517B5DC42.o
     -[NetAssociation finish] in NetAssociation-586077E517B5DC42.o
     -[NetAssociation onUdpSocketDidClose:] in NetAssociation-586077E517B5DC42.o
     -[NetworkClock createAssociations] in NetworkClock-496336397AA5FC44.o
     -[NetworkClock applicationBack:] in NetworkClock-496336397AA5FC44.o
     -[NetworkClock applicationFore:] in NetworkClock-496336397AA5FC44.o
  ld: symbol(s) not found for architecture armv7
  clang: error: linker command failed with exit code 1 (use -v to see invocation)


  Warning: no rule to process file '$(PROJECT_DIR)/SwapViews_3/NetAssociation.h' of type   
 sourcecode.c.h for architecture armv7

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在要编译的.c文件中不应该有.h文件。 转到目标的“构建阶段”选项卡。然后检查“编译源代码”部分并删除.h文件