xcode 12 问题记录

1  终端pod  报错 如下

(xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools)

解决方法在终端直接 打  xcode-select --install 更新等待一段时间之后 重启终端

2

解决如下 

Step 1: Go to TARGETS -> Build Settings -> No Common Blocks -> No

Step 2: Go to TARGETS -> Build Settings -> enable testability -> No