如何在构建 Unity 项目后修复 Xcode 中的“Undefined symbols for architecture arm64:”错误？

Question

In my Unity project I wanna use Google Mobile Ads and when I build it for Xcode and try to launch on a device, I get the next error.

---

This is what I'm getting. ld: warning: arm64 function not 4-byte aligned: _unwind_tester from /path_to_my_project/Libraries/libiPhone-lib.a(unwind_test_arm64.o). Undefined symbols for architecture arm64: .

---

Answer 1

I had struggled with this issue too and turns out my problem was because my iPhone IOS version didn't match with the setting in the Xcode.

Answer 2

had a similar issue with some of the latest versions of xcode, i solved it by doing the following:

• Install Xcode 9.3.1 (probably other older version will work as well)

• Go to /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib in the xcode 9.3.1 installation

• copy the libc++ and libstdc++ libraries (there might be some other libraries im missing here, i did this a while ago) over to the same place in your current xcode installation and restart the current xcode and try to build again.

hope this helps!