IOS error undefined symbols for architecture i386

Undefined symbols for architecture i386 This error bothered me for a few hours.

A lot of questions on the Internet, the answer is basically said in target to go to the armv64 what.

But the problem is not here at all!

The big simple problem is the lack of necessary libraries! Enter Target-general, add libz.dylib

Done!

But the various answers on the internet have caused me to be deeply misled, so I wasted a few hours in vain. I was surprised to ask what the answer was not found on the internet, and I stumbled upon it.

But there is nothing to use this library, and what the library does, I haven't had time to study it in detail.

IOS error undefined symbols for architecture i386