为了它的价值，我的是固定后，我去了目标->构建阶段->链接二进制与库，删除libstdc++。TBD引用，然后添加了对libstdc++.6.0.9. TBD的引用。

我在安装shareKit时遇到了这个问题。它可以在模拟器中运行，但不能在设备上运行。我从其他链接器标志中删除了-all_load，一切都在模拟器和iphone设备中正常工作。

当我使用admob库时，我也有同样的问题，我修复了它将“架构”更改为“标准架构armv7, armv7s”，而不包括64位。

将m文件(包括funcs方法)重命名为mm，反之亦然。 我的解决了将mm重命名为m 或者m到mm。

常见的原因

导致“架构armv7中未定义的符号”的常见原因有:

You import a header and do not link against the correct library. This is common, especially for headers for libraries like QuartzCore since it is not included in projects by default. To resolve: Add the correct libraries in the Link Binary With Libraries section of the Build Phases. If you want to add a library outside of the default search path you can include the path in the Library Search Paths value in the Build Settings and add -l{library_name_without_lib_and_suffix} (eg. for libz.a use -lz) to the Other Linker Flags section of Build Settings. You copy files into your project but forgot to check the target to add the files to. To resolve: Open the Build Phases for the correct target, expand Compile Sources and add the missing .m files. If this is your issue please upvote Cortex's answer below as well. You include a static library that is built for another architecture like i386, the simulator on your host machine. To resolve: If you have multiple library files from your libraries vendor to include in the project you need to include the one for the simulator (i386) and the one for the device (armv7 for example). Optionally, you could create a fat static library that contains both architectures.

最初的回答:

您没有链接到正确的libz文件。如果你右键点击该文件并在finder中显示它的路径应该在iOS sdk文件夹中的某个地方。这是我的例子

/开发/平台/ iPhoneOS.platform /开发/ sdk / iPhoneOS4.3.sdk / usr / lib

我建议删除引用，然后在目标的构建阶段Link Binary With Libraries部分重新添加它。

下面是我是如何得到这个问题的:

我从另一个项目中添加了.h， .m和NIB，把它们拖到我的项目导航器上。Xcode没有正确地将它们添加到构建阶段。

检查我的答案，因为我有一个类似的问题，我可以通过做一些步骤来解决。