如何允许所有库在arm64和armv7上运行？

Question

我收到了这个错误：

undefined symbols for architecture x86_64:
  "_OBJC_CLASS_$_PayTabCardReaderViewController", referenced from:
      objc-class-ref in PayViewController.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

PayTabsLibrary.a可以仅在armv7上运行，而不是在arm64上运行。但我有其他库在arm64上运行，所以这就是我收到错误的原因。

如何允许所有库在arm64和armv7上运行？