objective-c - I made a demo of Baidu map positioning, but there were many errors.

Question

1. Baidu Cloud Disk 15M Please help me take a look http://pan.baidu.com/s/1dFfSUHj
2. My previous approach was to initialize a BMKManager object in AppDelegate.m to obtain network status and usage permissions. Then change a .m to .mm
3. A lot of mistakes happened at this step

Answer 1

Copy an error code and search it in Baidu. The answer is that a system class library is missing.

Answer 2

There is usually a demo, so run a simple demo first to try.